All Wiring Diagrams for Chevrolet Forward Control P30 1999

AIR CONDITIONING

4.3L

4.3L VIN W, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 4.3L VIN W, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999:

• (at left rear of cylinder head) g114
• (in engine harness approximately 4 cm (2 in) from breakout for 36 pin in-line connector, left side of firewall towards grommet on same) s110
• (in engine harness approximately 7 cm (3 in) from throttle position sensor breakout toward an engine to fuel injector in-line harness connector: (12 pin, 4.3l vin w) (16 pin, 5.7l vin r) s138
• (in engine harness, approximately 11 cm (4 in) from 36 pin in-line connector breakout on left side of firewall, towards grommet on left side of firewall) s144
• (in engine harness, approximately 19 cm (8 in) from 36 pin in-line connector breakout on left side of firewall towards maf sensor) s132
• (left interior bulkhead near relay bracket) g202
• (on left side of radiator support) vehicle control module (vcm)
• 13 cm (5 in) from a/c compressor high pressure cut-off switch breakout) s124
• A/c compressor clutch (left side of engine)
• A/c compressor enable rly ctrl
• A/c compressor high pressure cut-off switch (opens: 430 +/- 20 psi) (closes: 200 +/- 50 psi) (on rear of a/c compressor)
• A/c compressor nca clutch diode (in engine harness, approx 13 cm (5 in) from breakout toward a/c compressor high pressure cut-off switch)
• A/c compressor refrigerant pressure switch (body builder installed) (on a/c accumulator)
• A/c compressor relay (on engine firewall relay bracket, under battery junction block)
• A/c low pressure switch signal
• A/c request signal
• Breakout to maf sensor from inline resistor) s142
• Eng bat fuse 10 15a
• Gauges fuse 8 20a
• Hot at all times
• Hot in run & start
• I/p fuse block (body builder installed) (behind dash panel)
• Nca
• Nca a
• Pnk
• Provisions for body builder hvac
• Resistor (in engine harness, approx 23 cm (9 in) from breakout to maf & iat sensors)
• S125

5.7L

5.7L VIN R, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 5.7L VIN R, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999:

• (at left rear of cylinder head) g114
• (in engine harness approximately 4 cm (2 in) from breakout for 36 pin in-line connector, left side of firewall towards grommet on same) s110
• (in engine harness approximately 7 cm (3 in) from throttle position sensor breakout toward an engine to fuel injector in-line harness connector: (12 pin, 4.3l vin w) (16 pin, 5.7l vin r) s138
• (in engine harness, approximately 11 cm (4 in) from 36 pin in-line connector breakout on left side of firewall, towards grommet on left side of firewall) s144
• (in engine harness, approximately 19 cm (8 in) from 36 pin in-line connector breakout on left side of firewall towards maf sensor) s132
• (left interior bulkhead near relay bracket) g202
• (on left side of radiator support) vehicle control module (vcm)
• 13 cm (5 in) from a/c compressor high pressure cut-off switch breakout) s124
• A/c compressor clutch (left side of engine)
• A/c compressor enable rly ctrl
• A/c compressor high pressure cut-off switch (opens: 430 +/- 20 psi) (closes: 200 +/- 50 psi) (on rear of a/c compressor)
• A/c compressor nca clutch diode (in engine harness, approx 13 cm (5 in) from breakout toward a/c compressor high pressure cut-off switch)
• A/c compressor refrigerant pressure switch (body builder installed) (on a/c accumulator)
• A/c compressor relay (on engine firewall relay bracket, under battery junction block)
• A/c low pressure switch signal
• A/c request signal
• Breakout to maf sensor from inline resistor) s142
• Eng bat fuse 10 15a
• Gauges fuse 8 20a
• Hot at all times
• Hot in run & start
• I/p fuse block (body builder installed) (behind dash panel)
• Nca
• Nca a
• Pnk
• Provisions for body builder hvac
• Resistor (in engine harness, approx 23 cm (9 in) from breakout to maf & iat sensors)
• S125

6.5L

6.5L VIN F, Manual A/C Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Manual A/C Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

• (at rear of left cylinder head) g114
• (in engine harness on end of a/c compressor clutch diode, approximately 13 cm (5 in) from a/c compressor high pressure cut-off switch breakout) s124
• (in engine harness, approximately 11 cm (4 in) from breakout for 36 pin in-line connector in left side of firewall, toward a/c compressor connectors) s132
• (left interior bulkhead near relay bracket) g202
• A/c compressor clutch
• A/c compressor clutch diode
• A/c compressor high pressure cut-off switch (on rear of a/c compressor)
• A/c compressor refrigerant pressure switch (body builder installed) (on a/c accumulator)
• A/c compressor relay (on engine firewall relay bracket, under battery junction block)
• A/c compressor relay ctrl
• A/c request signal
• Approximately 4 cm (2 in) from starter motor breakout towards black black 15 pin harness in-line connector on frame rail) s118
• Eng bat fuse 10 15a
• Gauges fuse 8 20a
• Hot at all times
• Hot in run & start
• I/p fuse block (body builder installed) (behind dash panel)
• Nca
• Pnk
• Powertrain control module (pcm) (on left side of driver's island on relay bracket)
• Resistor nca (in engine harness, approximately 25 cm (10 in) from powertrain control module (pcm) connector c3)
• S125

6.5L VIN F, Manual A/C Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Manual A/C Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999:

• (at right rear of cylinder head) g117
• (in breakout for a/c compressor clutch, 21 cm (9 in) from a/c compressor clutch connector) s123
• (in engine harness, 35 cm (13 in) from grommet left side of firewall in engine compartment) s115
• (mounted to top front of steering column support plate) g207
• A/c compressor clutch
• A/c compressor clutch diode
• A/c compressor high pressure cut-off switch (on rear of a/c compressor)
• A/c compressor refrigerant pressure switch (body builder installed) (on a/c accumulator)
• A/c compressor relay (on right side of driver's island)
• A/c compressor relay ctrl
• A/c request signal
• Eng bat fuse 10 15a
• Gauges fuse 8 20a
• Grommet toward 56-pin in-line connector on left side of dash) s235
• Hot at all times
• Hot in run & start
• I/p fuse block (body builder installed) (behind dash panel)
• Nca
• Pnk
• Powertrain control module (pcm) (on left side of driver's island on relay bracket)
• S122 (in breakout for a/c compressor clutch, 21 cm (9 in) from a/c compressor clutch connector)
• S168 (in engine harness, 4 cm (2 in) from breakout for 2 in-line connectors near battery junction block, left side of firewall)
• Stoplamp switch)

6.5L VIN Y, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999:

• (in engine harness on end of a/c compressor clutch diode, approximately 13 cm (5 in) from a/c compressor high pressure cut-off switch breakout) s124
• (in engine harness, approximately 4 cm (2 in) from breakout for abs harness in-line connectors) s110
• (left interior bulkhead near relay bracket) g202
• A/c compressor clutch
• A/c compressor clutch diode
• A/c compressor high pressure cut-off switch (open: 430 +/- 20 psi) (close: 200 +/- 50 psi) (on rear of a/c compressor)
• A/c compressor refrigerant pressure switch (body builder installed) (on a/c accumulator)
• A/c compressor relay (on engine firewall relay bracket, under battery junction block)
• Eng-bat fuse 10 15a
• Hot at all times
• I/p fuse block (body builder installed) (behind dash panel)
• Nca
• S125

7.4L

7.4L VIN J, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999:

• (at right rear of cylinder head) g117
• (body builder a/c controls)
• (in breakout for a/c compressor clutch, 21 cm (9 in) from a/c compressor clutch connector) s123
• (in breakout for vcm, 20 cm (8 in) from main engine harness) s132
• (in breakout for vcm, 20 cm (8 in) from main engine harness) s140
• (in engine harness, 35 cm (13 in) from grommet left side of firewall in engine compartment) s115
• (mounted to top front of steering column support plate) g207
• 1100 ohms (+/- 1%) 0.75 watt (in engine harness, 20 cm (8 in) from abs harness breakout)
• A/c compressor clutch
• A/c compressor enable rly ctrl
• A/c compressor high pressure cut-off switch (on rear of a/c compressor)
• A/c compressor refrigerant pressure switch (body builder installed) (open: 2-9 psi) (close: 22-32 psi) (on a/c accumulator)
• A/c compressor relay (on right side of driver's island)
• A/c request signal
• Diode
• Eng bat fuse 10 15a
• Gauges fuse 8 20a
• Grommet toward 56-pin in-line connector on left side of dash) s235
• Hot at all times
• Hot in run & start
• I/p fuse block (body builder installed) (behind dash panel)
• Low pressure cutout signal
• Nca
• Pnk
• S122 (in breakout for a/c compressor clutch, 21 cm (9 in) from a/c compressor clutch connector)
• S150
• Vehicle control module (vcm) (on top of radiator support)

ANTI-LOCK BRAKES

Anti-lock Brake Wiring Diagrams, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Anti-lock Brake Wiring Diagrams, Commercial Chassis for Chevrolet Forward Control P30 1999:

• (gas, mech diesel) (electric diesel)
• 1-3 fuse 9 10a
• 32 cm from breakout to battery junction block)
• Abs diagnostic link
• Abs ind
• Abs lamp control
• Battery
• Brake ind
• Brake pressure differential switch (internal to electronic brake control module)
• Brake sw input
• Brake warning lamp
• Data link connector (below dash, near steering column)
• Diesel
• Diode network (on i/p harness, body builder installed)
• Electronic brake control module (below radiator, on lower crossmember)
• Engine control system
• Fuse link (in battery junction block, at left rear of engine compt)
• G113 (left front frame rail)
• G125 (top of thermostat housing)
• Gas
• Gauges fuse 8 20a
• Ground
• Hot at all times
• Hot in run
• Hot in run and start
• I/p fuse block (behind dash panel, body builder installed)
• Ignition
• Instrument cluster
• Left front wheel speed sensor
• Module (left side of radiator support)
• Nca
• Pnk
• Powertrain control module (left side of driver's island on relay bracket)
• Red
• Right front wheel speed sensor
• S104 (diesel) s150 (gas) (engine harn, 18 cm from breakout to abs connectors) (gas) (engine harn, 25 cm from breakout to battery junction block) (diesel)
• S133 s233
• S161
• S165 (abs harn, 10 cm from breakout to abs connectors)
• S200 (gas) s102 (diesel) (gas: dash side of engine harn, 19 cm from p100; diesel: engine harn,
• S207
• Sensor high
• Sensor low
• Serial data line
• Stoplamps switch (at brake pedal support)
• Tan
• Vehicle control
• Vehicle speed input
• Vehicle speed sensor calibrator (left side of driver's island on relay bracket)
• Warnings system

Anti-lock Brake Wiring Diagrams, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Anti-lock Brake Wiring Diagrams, Motor Home Chassis for Chevrolet Forward Control P30 1999:

• (gas) (diesel)
• (gas: engine harn, 15 cm from breakout to abs connectors; diesel: dash side of engine harn, 7 cm from breakout to wiper switch)
• 1-3 fuse 9 10a
• Abs diagnostic link
• Abs ind
• Abs lamp control
• Battery
• Brake ind
• Brake pressure differential switch (internal to electronic brake control module)
• Brake sw input
• Brake warning lamp
• Data link connector (below dash, near steering column)
• Diesel
• Diode network (on i/p harness, body builder installed)
• Electronic brake control module (below radiator, on lower crossmember)
• Electronic transmission system
• Fuse link (in battery junction block, at left rear of engine compt)
• G113 (left front frame rail)
• G125 (top of thermostat housing)
• Gas
• Gauges fuse 8 20a
• Ground
• Hot at all times
• Hot in run
• Hot in run and start
• I/p fuse block (behind dash panel, body builder installed)
• Ignition
• Instrument cluster
• Left front wheel speed sensor
• Module (top of radiator support)
• Nca
• Pnk
• Powertrain control module (left side of driver's island on relay bracket)
• Red
• Right front wheel speed sensor
• S102 (gas) s200 (diesel) (gas: engine harn, 25 cm from breakout to windshield wiper; diesel: dash side of engine harn, 8 cm from breakout to turn signal switch)
• S116 s229
• S165 (abs harn, 10 cm from breakout to abs connectors)
• S167
• S170 (gas)
• S202 (diesel)
• S211
• Sensor high
• Sensor low
• Serial data line
• Stoplamps switch (at brake pedal support)
• Tan
• Vehicle control
• Vehicle speed input
• Vehicle speed sensor calibrator (left side of driver's island on relay bracket)
• Warnings system

COMPUTER DATA LINES

Computer Data Lines, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Computer Data Lines, Commercial Chassis for Chevrolet Forward Control P30 1999:

• B10
• Data clss 2
• Data link connector (dlc) (below dash, near steering column)
• Diesel gas
• Electronic brake control module (ebcm) (below radiator, on lower crossmember)
• Eng bat fuse 10 15a
• G114 (left rear of engine)
• G200 (left interior bulkhead, near relay bracket)
• Hot at all times
• I/p fuse block
• S110
• S143
• S144
• S150 (diesel- eng harn, 14 cm from left rear eng compartment grommet, gas- eng harn, 4 cm from battery junction block breakout)
• Serial data
• Tan
• Transmission control module (tcm) (diesel a/t only) (on left side of driver's island, on relay bracket)
• Vehicle control module (vcm) powertrain control module (pcm) (gas- on left side of driver's island, on relay bracket, diesel- on top of radiator support)

Computer Data Lines, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Computer Data Lines, Motor Home Chassis for Chevrolet Forward Control P30 1999:

• (engine harness, 15 cm from cruise control module breakout) (gas) g201
• Data clss 2
• Data link connector (below dash, near steering column)
• Diag sig
• Diesel
• Electronic brake control module (ebcm) (below radiator, on lower crossmember)
• Eng bat fuse 10 15a
• G125 (top of thermostat housing)
• G202 (left side of dash)
• Gasoline
• Hot at all times
• I/p fuse block
• Powertrain control module (pcm) (on left side of driver's island, on relay bracket)
• S101
• S143
• S144
• S202 (diesel) (engine harness, 7 cm from wiper switch breakout)
• Serial data
• Vehicle control module (vcm) (top of radiator support)

COOLING FAN

6.5L

6.5L VIN F, Cooling Fan Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Cooling Fan Wiring Diagram for Chevrolet Forward Control P30 1999:

• (in dash side of engine harness, 28 cm (11 in) from grommet left side of firewall) s228
• (in engine harness, 9 cm (4 in) from breakout for auxiliary engine coolant fan, toward grommet left side of firewall) s113
• (mounted to top front of steering column support plate) g207
• Auxiliary engine coolant fan a/c pressure switch (close at: 205-265 psi) (open at: 125 psi min) (in a/c compressor high pressure line (body builder installed)
• Auxiliary engine coolant fan temperature switch (in thermostat housing crossover, front of engine)
• Auxiliary engine cooling fan (mounted on front of radiator)
• Eng-1 fuse 15 20a
• Fan control relay (on top of steering column support, behind steering column)
• Hot at all times
• Hot in run & start
• I/p fuse block (body builder installed) (behind dash panel)
• Pnk
• Red
• S101 (in engine harness, 16 cm (7 in) from breakout for auxiliary engine coolant fan, toward grommet left side of firewall)

6.5L VIN Y, Cooling Fan Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Cooling Fan Wiring Diagram for Chevrolet Forward Control P30 1999:

• (in engine harness, approximately 5 cm (2 in) from breakout for cold advance solenoid, engine coolant temperature switch, toward glowplug controller breakout) s116
• (left interior bulkhead near relay bracket) g202
• Auxiliary engine coolant fan (mounted on front of radiator)
• Auxiliary engine coolant fan a/c pressure switch (body builder installed) (close at: 205-265 psi) (open at 125 psi min) (in a/c compressor high pressure line)
• Eng-1 fuse 15 20a
• Fan control relay (on engine firewall relay bracket, under battery junction block)
• Hot at all times
• Hot in run & start
• I/p fuse block (body builder installed) (behind dash panel)
• Pnk
• Red
• S110 (in engine harness, approximately 4 cm (2 in) from breakout for abs harness connectors)

7.4L

7.4L VIN J, Cooling Fan Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, Cooling Fan Wiring Diagram for Chevrolet Forward Control P30 1999:

• (top of steering column support plate) g207
• Aux fan ctrl
• Aux fan sw signal
• Auxiliary engine coolant fan a/c pressure switch (close at: 205-265 psi) (open at: 125 psi min) (in a/c compressor high pressure line (body builder installed)
• Eng-bat fuse 10 15a
• Engine coolant fan motor (mounted to radiator)
• Fan control relay (on top of steering column support, behind steering column)
• Hot at all times
• I/p fuse block (behind dash panel)
• In-line connector on left side of dash) s235
• Red
• Vehicle control module (vcm) (on top of radiator support)

CRUISE CONTROL

4.3L

4.3L VIN W, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 4.3L VIN W, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999:

• 1-3 fuse 9 15a
• A/t iss high
• A/t iss low
• Automatic transmission shaft speed sensor (a/t iss) (left side of transmission)
• Brake sw input
• Cruise control module (on left radiator support bracket)
• Cruise control switch
• Cruise engaged
• Cruise engaged in
• Cruise on/off input
• Exterior lights system
• G117 (rear of right cylinder head)
• G125 (on top of thermostat housing)
• Ground
• Hazard lamps flasher (left of steering column)
• Hot at all times
• Hot in run
• I/p fuse block (behind dash panel) (body builder installed)
• Ignition
• Nca
• Off
• R/a
• R101 resistor (engine harness, 7 cm from breakout to engine coolant fan motor conn)
• Resume/accel input
• S/c
• S102 (engine harness, near bulkhead)
• S116
• S124 (engine harness, 11 cm from breakout to cruise control module)
• S126
• S143
• Set/coast input
• Stop/haz fuse 1 15a
• Stoplamp sw signal
• Stoplamps switch (above brake pedal)
• Torque converter clutch & stoplamps switch (above brake pedal)
• Vehicle control module (vcm) (on left radiator support bracket)
• Vss input
• Vss output

5.7L

5.7L VIN R, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 5.7L VIN R, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999:

• 1-3 fuse 9 15a
• A/t iss high
• A/t iss low
• Automatic transmission shaft speed sensor (a/t iss) (left side of transmission)
• Brake sw input
• Cruise control module (on left radiator support bracket)
• Cruise control switch
• Cruise engaged
• Cruise engaged in
• Cruise on/off input
• Exterior lights system
• G117 (rear of right cylinder head)
• G125 (on top of thermostat housing)
• Ground
• Hazard lamps flasher (left of steering column)
• Hot at all times
• Hot in run
• I/p fuse block (behind dash panel) (body builder installed)
• Ignition
• Nca
• Off
• R/a
• R101 resistor (engine harness, 7 cm from breakout to engine coolant fan motor conn)
• Resume/accel input
• S/c
• S102 (engine harness, near bulkhead)
• S116
• S124 (engine harness, 11 cm from breakout to cruise control module)
• S126
• S143
• Set/coast input
• Stop/haz fuse 1 15a
• Stoplamp sw signal
• Stoplamps switch (above brake pedal)
• Torque converter clutch & stoplamps switch (above brake pedal)
• Vehicle control module (vcm) (on left radiator support bracket)
• Vss input
• Vss output

6.5L

6.5L VIN F, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999:

• (behind dash panel (body builder installed)
• 1-3 fuse 9 15a
• A/t iss high
• A/t iss low
• A11
• Automatic transmission shaft speed sensor (a/t iss) (left side of transmission)
• B10
• Cruise control switch
• Cruise on/off input
• D10
• D11
• Exterior lights system
• Hazard lamps flasher (left of steering column)
• Hot at all times
• Hot in run
• I/p fuse block
• Nca
• Off
• Powertrain control module (pcm) (on left side of driver's island)
• R/a
• Resume/accel input
• S/c
• S200 (i/p side of engine harn, 8 cm from breakout to turn signal switch conn)
• S224 (i/p side of engine harness, 16 cm from p100)
• S229
• Set/coast input
• Stop/haz fuse 1 15a
• Stoplamp sw signal
• Stoplamps switch (above brake pedal)
• Tcc/stop sw sig
• Torque converter clutch & stoplamps switch (above brake pedal)

6.5L VIN Y, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999:

• (behind dash panel (body builder installed)
• 1-3 fuse 9 15a
• A/t iss high
• A/t iss low
• A11
• Automatic transmission shaft speed sensor (a/t iss) (left side of transmission)
• B10
• Cruise control switch
• Cruise on/off input
• D10
• D11
• Exterior lights system
• Hazard lamps flasher (left of steering column)
• Hot at all times
• Hot in run
• I/p fuse block
• Nca
• Off
• Powertrain control module (pcm) (on left side of driver's island)
• R/a
• Resume/accel input
• S/c
• S200 (i/p side of engine harn, 8 cm from breakout to turn signal switch conn)
• S224 (i/p side of engine harness, 16 cm from p100)
• S229
• Set/coast input
• Stop/haz fuse 1 15a
• Stoplamp sw signal
• Stoplamps switch (above brake pedal)
• Tcc/stop sw sig
• Torque converter clutch & stoplamps switch (above brake pedal)

7.4L

7.4L VIN J, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999:

• 1-3 fuse 9 15a
• A/t iss high
• A/t iss low
• Automatic transmission shaft speed sensor (a/t iss) (left side of transmission)
• Brake sw input
• Cruise control module (on left radiator support bracket)
• Cruise control switch
• Cruise engaged
• Cruise engaged in
• Cruise on/off input
• Exterior lights system
• G117 (rear of right cylinder head)
• G125 (on top of thermostat housing)
• Ground
• Hazard lamps flasher (left of steering column)
• Hot at all times
• Hot in run
• I/p fuse block (behind dash panel) (body builder installed)
• Ignition
• Nca
• Off
• R/a
• R101 resistor (engine harness, 7 cm from breakout to engine coolant fan motor conn)
• Resume/accel input
• S/c
• S102 (engine harness, near bulkhead)
• S116
• S124 (engine harness, 11 cm from breakout to cruise control module)
• S126
• S143
• Set/coast input
• Stop/haz fuse 1 15a
• Stoplamp sw signal
• Stoplamps switch (above brake pedal)
• Torque converter clutch & stoplamps switch (above brake pedal)
• Vehicle control module (vcm) (on left radiator support bracket)
• Vss input
• Vss output

ENGINE PERFORMANCE

4.3L

4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Forward Control P30 1999

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Forward Control P30 1999:

• (on throttle body assembly) idle air control (iac) valve
• (right front of engine at crankshaft pulley)
• (top right side of engine) evaporative emissions (evap) canister purge valve
• 1-2 shift sol ctrl
• 2-3 shift sol ctrl
• 3x ckp sens sig
• A pnk
• Anti- lock brake system
• Cam posit sens rtn
• Cam posit sens sig
• Camshaft position (cmp) sensor (internal to distributor)
• Ckp sens rtn
• Crankshaft position (ckp) sensor
• Ect sensor input
• Egr posit input
• Evaporative emissions (evap) canister vent valve (right frame rail in front of fuel tank)
• Fuel inj 1 ctrl
• Fuel inj 2 ctrl
• Fuel inj 3 ctrl
• Fuel inj 4 ctrl
• Fuel inj 5 ctrl
• Fuel inj 6 ctrl
• Fuel lev
• G114 (rear of left cylinder head)
• Hall effect sensor
• Heated oxygen sensor bank 1, sensor 1 pre-converter (left exhaust down pipe, before catalytic converter)
• Ho2s bnk1 sens1 gnd
• Ho2s bnk1 sens1 sig
• Ho2s bnk2 sens1 gnd
• Ho2s bnk2 sens1 sig
• Ho2s post sens2 gnd
• Ho2s post sens2 sig
• Iat sens sig
• Idle air ctrl (a-low)
• Idle air ctrl (b-low)
• Idle air ctrl (iac) a-hi
• Idle air ctrl (iac) b-hi
• Ign feed
• Knock sens sig
• Knock sensor (ks) (top center rear of engine)
• Map sensor input
• Mass air flow input
• Nca
• Pnk
• Pnk c
• Pnk d
• Pnk pnk pnk
• Purge vent ctrl
• Return
• S138
• S139
• S140
• Sensor signal
• Tan
• Tank press sens
• Tank pressure sensor (top of fuel tank)
• Tcc pwm sol ctrl
• Tft sig
• Throttle position sens
• Vehicle control module (vcm) (com. van: left side of radiator support motor home: top of radiator support)
• Vehicle speed out
• Vehicle speed sensor (vss) (left side of transmission)
• Vss rtn
• Vss sig
• Whl spd sig, left frt

4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Forward Control P30 1999

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Forward Control P30 1999:

• (rear of left cylinder head) g114
• (top front of engine) exhaust gas recirculation (egr) valve
• 1-2 shift solenoid
• 2-3 shift solenoid
• Automatic transmission (a/t) (if equipped) (rear of engine)
• Ecm 1 fuse 12 20a
• Eng 1 fuse 15 20a
• Fuel injector no.1
• Fuel injector no.2
• Fuel injector no.3
• Fuel injector no.4
• Fuel injector no.5
• Fuel injector no.6
• Heated oxygen sensor bank 2, sensor 1 (right exhaust down pipe, before catalytic converter)
• Heated oxygen sensor, bank 1 sensor 2 (on exhaust system after catalytic converter)
• Hot in run & start
• I/p fuse block (behind dash panel) (body builder installed)
• Nca
• Pnk
• Pnk d
• Pnk n
• Pressure control solenoid (pcs)
• Red
• Red p
• Rev
• S108
• S116
• S118
• S145
• Tan
• Tan a
• Tcc pwm solenoid
• Trans fuse 17 10a
• Transmission fluid temperature (tft) sensor
• Transmission range (tr) pressure switch assembly

4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Forward Control P30 1999

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Forward Control P30 1999:

• (eng harn, approx 23 cm from ect sensor breakout)
• (eng harn, approx 8cm from tps breakout) s136
• (engine harn, 7 cm from ignition control module breakout)
• (left frame rail, in front of fuel tank) g416
• 5v ref
• A/c compressor high pressure cut-off switch (rear of a/c compressor)
• Eng bat fuse 10 15a
• Engine coolant temperature (ect) sensor (top front of engine)
• Fuel gauge
• Fuel sender & fuel pump (top of fuel tank)
• G114 (rear of left cylinder head)
• G114 (rear of left cylinder head)
• Gauges fuse 8 10a
• Hot at all times
• Hot in run & start
• I/p fuse block (behind dash panel) (body builder installed)
• Instrument cluster
• Intake air temperature (iat) sensor (mounted in fresh air intake, behind filter box)
• Malfunction indicator lamp
• Manifold absolute pressure (map) sensor (near center of intake manifold, behind air intake)
• Map
• Mass air flow sensor (maf) (mounted in fresh air intake, behind air filter box)
• Nca
• Pnk
• Pnk pnk pnk
• R100 (1100 ohms .75 watts)
• Red
• Ref lo
• S119 (eng harn, approx 11cm from ect sensor breakout)
• S135
• S138
• S142 (eng harn, approx 23cm from maf sensor breakout)
• S144
• S145
• S207
• S218
• S406
• Speedo meter
• Tacho meter
• Tan a
• Temp
• Throttle position (tp) sensor (on throttle body, top of engine)

4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Forward Control P30 1999

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Forward Control P30 1999:

• (engine harn, 18 cm from breakout to bulkhead conn)
• (i/p side of eng harn, approx 19cm from left bulkhead grommet toward ignition sw)
• (left interior bulkhead near relay bracket) (body builder installed) g202
• (rear of left cylinder head)
• (rear of left cylinder head) g114
• 5v ref
• 5v return
• 87a
• A/c request sig
• A/c system
• Brake sig
• Cylinder 1
• Cylinder 2
• Cylinder 3
• Cylinder 4
• Cylinder 5
• Cylinder 6
• Data link connector (dlc) (partial) (below dash, near steering column)
• Distributor (top rear of engine)
• Ecm bat fuse 6 20a
• Egr valve ctrl
• Electronic brake control module
• Evap can purge ctrl
• Fuel level
• Fuel pump prime connector (taped to fuel pump relay breakout)
• Fuel pump relay (com. van: on engine firewall relay bracket, under battery junction block, motor home: on right side of driver's island)
• Fuel pump rly ctrl
• G114
• Ground
• High voltage coil wire
• Hot at all times
• Hot in run
• I-3 fuse 9 15a
• I/p fuse block (behind dash panel) (body builder installed)
• Ign feed
• Ignition coil (top right side of engine)
• Ignition control module (right top of engine, at ignition coil)
• Ignition feed
• Input spd sens rtn
• Input spd sens sig
• Mil ctrl
• Pcs sol (hi)
• Pcs sol (lo)
• Pnk
• Pnk a
• Pressure switch in
• Range sig "a"
• Range sig "b"
• Range sig "c"
• Red
• Relay ctrl
• S133
• S134
• S138
• S143
• S150
• S200
• Serial data
• Shift interlock system
• Spark plugs
• Timing control return
• Timing control signal
• Timing ctrl sig
• Torque converter clutch & stop lamp switch (at brake pedal suppport)
• Transmission input speed sensor (on left side of trnasmission, near the middle)
• Vcm ground
• Vehicle control module (vcm) (com van: left side of radiator support motor home: top of radiator support)
• Vss output

5.7L

5.7L VIN R, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Forward Control P30 1999

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Forward Control P30 1999:

• (on throttle body assembly) idle air control (iac) valve
• (right front of engine at crankshaft pulley) crankshaft position sensor (ckp)
• (top right side of engine) evaporative emissions (evap) canister purge valve
• 1-2 shift sol ctrl
• 2-3 shift sol ctrl
• 4x ckp sens sig
• A pnk
• Anti-lock brake system
• Cam posit sens rtn
• Cam posit sens sig
• Camshaft position (cmp) sensor (internal to distributor)
• Ckp sens rtn
• Ect sensor in
• Egr posit in
• Evaporative emissions (evap) canister vent solenoid valve (on right frame rail in front of fuel tank)
• Fuel inj 1 ctrl
• Fuel inj 2 ctrl
• Fuel inj 3 ctrl
• Fuel inj 4 ctrl
• Fuel inj 5 ctrl
• Fuel inj 6 ctrl
• Fuel inj 7 ctrl
• Fuel inj 8 ctrl
• Fuel lev signal
• Fuel tank pressure sensor (at fuel tank)
• G114 (rear of left cylinder head)
• Hall effect sensor
• Heated oxygen sensor, bank 1 sensor 1 (left exhaust down pipe, after catalytic converter)
• Heated oxygen sensor, bank 2 sensor 1 (right exhaust down pipe. before catalytic converter)
• Ho2s bnk1 sens1 gnd
• Ho2s bnk1 sens1 sig
• Ho2s bnk1 sens2 gnd
• Ho2s bnk1 sens2 sig
• Ho2s bnk2 sens1 gnd
• Ho2s bnk2 sens1 sig
• Ho2s bnk2 sens2 gnd
• Ho2s bnk2 sens2 sig
• Iat sens sig
• Idle air ctrl (a-low)
• Idle air ctrl (b-low)
• Idle air ctrl (iac) a-hi
• Idle air ctrl (iac) b-hi
• Knock sens sig
• Knock sensor (ks) (lower right side of engine)
• Map sensor in
• Mass air flow in
• Nca
• Pnk
• Pnk c
• Pnk d
• Pnk pnk
• Purge vent
• S138
• S139
• S140
• Tan
• Tan a
• Tank pressure
• Tcc pwm sol ctrl
• Tft sig
• Throttle posit sens
• Vehicle control module (vcm) (com. van: left side of radiator support, motor home: top of radiator support)
• Vehicle speed out
• Vehicle speed sensor (vss) (left side of transmission)
• Vss rtn
• Vss sig

5.7L VIN R, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Forward Control P30 1999

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Forward Control P30 1999:

• (rear of left cylinder head) g114
• 1-2 shift solenoid
• 2-3 shift solenoid
• Automatic transmission (a/t) (if equipped) (rear of engine)
• Ecm-1 fuse 12 20a
• Eng 1 fuse 15 20a
• Exhaust gas recirculation (egr) valve (top front of engine)
• Fuel injector
• Heated oxygen sensor, bank 1 sensor 2 (left exhaust system, after catalytic converter)
• Heated oxygen sensor, bank 2 sensor 2 (right exhaust system after catalytic converter)
• Hot in run & start
• I/p fuse block (behind dash panel) (body builder installed)
• Nca
• Pnk
• Pnk d
• Pnk n
• Pressure control solenoid (pcs)
• Red
• Red p
• Rev
• S108
• S116
• S118
• S145
• Tan
• Tan a
• Tcc pwm solenoid
• Transmission fluid temperature sensor
• Transmission range (tr) pressure switch assembly

5.7L VIN R, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Forward Control P30 1999

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Forward Control P30 1999:

• (eng harn, approx 23 cm from maf sensor breakout)
• (eng harn, approx 4 cm from breakout for in-line connector toward ignition control module)
• (eng harn, approx 8cm from ect sensor breakout)
• (eng harn, approx 8cm from tp sensor breakout)
• (left frame rail, in front of fuel tank) g416
• (rear of left cylinder head) g114
• 5v ref
• A/c compressor high pressure cut-off switch (rear of a/c compressor)
• Engine coolant temperature (ect) sensor (top front of engine)
• F2 eng-bat fuse 10 15a f1
• Fuel gauge
• Fuel sender & fuel pump (top of fuel tank)
• G114 (rear of left cylinder head)
• Gauges fuse 8 20a
• Hot at all times
• Hot in run & start
• I/p fuse block (behind dash panel) (body builder installed)
• Instrument cluster
• Intake air temperature (iat) sensor (mounted in fresh air intake, behind air filter box)
• Manifold absolute pressure (map) sensor (near center of intake manifold, behind air intake)
• Map
• Mass air flow (maf) sensor (mounted in fresh air intake, behind air filter box)
• Nca
• Pnk
• R100 (1100 ohms .75 watts)
• Red
• Ref lo
• S119 (eng harn, approx 4cm from ect sensor breakout)
• S135
• S136
• S138
• S142
• S144
• S145
• S207
• S218
• S406
• Service engine soon indicator
• Speedo meter
• Tacho meter
• Tan
• Tan a
• Temp
• Throttle position (tp) sensor (on throttle body, top of engine)
• Trans fuse 17 10a

5.7L VIN R, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Forward Control P30 1999

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Forward Control P30 1999:

• (below dash,
• (eng harn, approx 18 cm from breakout for in-line connector, toward left bulkhead grommet)
• (i/p harn, approx 19 cm from left bulkhead grommet)
• (left interior bulkhead near relay bracket) g202
• (rear of left cylinder head)
• (rear of left cylinder head) g114
• 5v ref
• 5v rtn
• 87a
• A/c compressor enable
• A/c request sig
• A/c sw in
• A/c system
• Anti-lock brake system
• Brake sig
• Clutch pedal position switch (top of clutch pedal support)
• Clutch sig
• Cylinder 1
• Cylinder 2
• Cylinder 3
• Cylinder 4
• Cylinder 5
• Cylinder 6
• Cylinder 7
• Cylinder 8
• Data link connector (dlc)
• Distributor (top rear of engine)
• Ecm-bat fuse 6 20a
• Egr ctrl
• Electronic brake control module
• Evap canp valve driver
• Feed ignition
• Fuel lev
• Fuel pump a prime connector (taped to fuel pump relay breakout)
• Fuel pump relay (com. van: on engine firewall relay bracket, under battery junction block, motor home: on right side of driver's island)
• Fuel pump rly ctrl
• G114
• Gnd
• Ground
• High voltage coil wire
• Hot at all times
• Hot in run
• I-3 fuse 9 15a
• I/p fuse block (behind dash panel) (body builder installed)
• Ign feed
• Ignition coil (top right side of engine)
• Ignition control module (right top of engine, at ignition coil)
• Input spd sens rtn
• Input spd sens sig
• Mil ctrl
• Near steering column)
• Pcs sol (hi)
• Pcs sol (lo)
• Pnk
• Pnk a
• Range sig "a"
• Range sig "b"
• Range sig "c"
• Red
• Return control
• S110
• S133
• S134
• S138
• S143
• S150
• S200
• Serial data
• Signal control timing
• Spark plugs
• Timing ctrl sig
• Torque converter clutch & stop lamp switch (at brake pedal support)
• Transmission input speed sensor (left side of transmission, near the middle)
• Vcm gnd
• Vehicle control module (vcm) (com. van: left side of radiator support, motor home: top of radiator support)
• Vss output

6.5L

6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (1 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (1 of 4) for Chevrolet Forward Control P30 1999:

• (eng harn, 14 cm from in-line connector toward fuel heater)
• (eng harn, 20 cm from oil pressure gauge sensor breakout)
• (lower left front of eng, behind torsional damper) crankshaft position sensor
• (on top right center of engine) boost sensor
• (or 506)
• (top of engine, in air intake) intake air temperature sensor
• (top of thermostat housing) g119
• (top right front of engine) engine coolant temperature sensor
• A/c request sig
• A/c system
• A10
• A11
• A12
• Antilock brakes system
• App 1 5 volt ref
• App 1 ground
• App 1 sig
• App 2 ground
• App 2 sig
• App 3 5 volt ref
• App 3 grd
• App 3 sig
• Automatic transmission
• B10
• B11
• B12
• Battery
• Boost & ckp 5 volt ref
• Boost sensor sig
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• Camshaft posit sens
• Ckp sen grd
• Ckp sens input
• Closure gnd
• Closure signal
• Criuse set/coast sig
• Cruise on/off sig
• Cruise resume/acc req
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Ect signal
• Fuel lift pump sig
• Fuel pump rly ctrl
• Fuel temp grd
• Fuel temp sig
• Glow plug relay ctrl
• Glow plug sig
• Ground
• High res sig
• Iat sig
• Ignition
• On/off
• Oss high
• Oss low
• Oss sig
• Pnk
• Powertrain control module (pcm) (left side of driver's island on relay bracket)
• Press ctrl sol vlv hi
• Press ctrl sol vlv lo
• Pressure control solenoid valve
• Pump cam 5 volt ref
• Range mode selector
• Red
• Resume
• S119
• S143
• S180
• S186
• Sensor gnd
• Set
• Solenoid valve 1-2 shift
• Solenoid valve 2-3 shift
• Solenoid valve tcc pwm
• Solid state
• Speed control switch
• Stoplamp switch
• Tan
• Tcc/abs brake sw
• Tft sensor
• Timing stepper mtr (high)
• Timing stepper mtr (low)
• Tr switch a
• Tr switch b
• Tr switch c
• Trans input speed sig
• Transmission input shaft speed sensor (left side of transmission, near the middle)
• Transmission output speed sensor (left side of trans- mission, near the middle)
• Transmission speed input
• Transmission temperature sensor
• Vehicle speed sensor calibrator (left side of driver's island under relay bracket)
• Vss out
• Vss signal

6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (2 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (2 of 4) for Chevrolet Forward Control P30 1999:

• (at brake pedal support)
• (i/p side of eng harn, 8 cm from breakout for turn signal switch connector) s200
• 5 volt ref
• Accelerator pedal position module (attached to accelerator pedal)
• App 1 sensor
• App 2 sensor
• App 3 sensor
• B fuel sol ctrl
• B pump cam sig
• Brake transmission shift interlock (btsi) relay (mounted on top of support bracket at driver's island)
• C closure grd
• C high res sig
• Closure signal
• D ignition
• D sensor ground
• Electronic brake control module (below radiator, on lower crossmember)
• Eng-1 h6
• Engine shutoff solenoid (at fuel injection pump)
• F4 i-3 fuse 9 15a f3
• Fuel sol high
• Fuel sol low
• Fuel sole- noid
• Fuel solenoid driver (on side of fuel injection pump)
• Fuse 15 20a
• G6 ecm-1 fuse 12 20a g5
• Haz fuse 11 15a
• Hazard lamps flasher (inner left side steering column support bracket)
• High
• Hot at all times
• Hot in run
• Hot in run or start
• I/p fuse block
• Ignition timing stepper motor (part of fuel injection pump)
• J6 trans fuse 17 10a j5
• Low
• Optical fuel temperature sensor (part of fuel injection pump assembly)
• Pnk
• Red
• S185
• S224 (i/p side of eng harn, 16 cm from left bulkhead grommet toward pcm)
• S229
• S232
• Stop lamp switch
• Stop/ g7
• Tan d
• Torque converter clutch (tcc) & stoplamps switch

6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (3 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (3 of 4) for Chevrolet Forward Control P30 1999:

• (eng harn, approx 24 cm from in-line connector toward fuel heater) s182
• (left frame rail, infront of fuel tank) g416
• (right rear of eng) g117
• 87a
• California
• Ecm-bat fuse 6 20a
• Eng- bat fuse 10 15a
• Federal
• Fuel heater (part of fuel/water separator)
• Fuel lift pump (inside right frame rail)
• Fuel pump prime connector (taped to fuel pump relay breakout)
• Fuel pump relay (on right side of driver's island)
• G119 (top of thermostat housing)
• Gauges fuse 8 20a
• Hot at all times
• Hot in run and start
• I/p fuse block
• Instrument cluster
• Malfunction indicator lamp (mil)
• Pnk
• Red
• S114
• S168
• S181
• S206
• S211
• S235
• S400
• Service throttle soon indicator
• Speed meter
• Tan
• Wait to start indicator
• Wastegate solenoid (top left rear of eng)
• Water in fuel indicator
• Water in-fuel indicator sensor (part of fuel/water separator (filter), rear of intake manifold)

6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (4 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (4 of 4) for Chevrolet Forward Control P30 1999:

• "serv throttle soon" ind
• (dlc) (partial) (below dash, near steering column)
• (left rear of eng, near firewall) glow plug controller
• A/c enable
• A/c system
• Antilock brakes system
• App 2 5 volt ref
• Battery
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• C4 a
• California
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector
• Eso ctrl
• Federal
• Fuel inject ctrl
• Fusible link (22 ga rust)
• G117 (right rear of eng)
• G119 (top of thermostat housing)
• G207 (top front of steering column support plate)
• Glow plug controller (left rear of eng, near firewall)
• Glow plug out
• Glow plug sig
• Grd
• Ground
• Hot at all times
• Ignition
• Left bank glow plugs
• Mil ind ctrl
• Nca
• Pnk
• Powertrain control module (pcm) (left side of driver's island on relay bracket)
• Red
• Right bank glow plugs
• Rly ctrl
• S101
• S143
• S181
• Serial data sig
• Shift sol 1-2 input
• Shift sol 2-3 input
• Tan
• Tcc pwm sol vlv ctrl
• Wait to start ind ctrl
• Wastegate sol ctrl
• Wiper switch) s202

6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (1 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (1 of 4) for Chevrolet Forward Control P30 1999:

• (a/t)
• (center rear of intake manifold) manifold absolute pressure sensor
• (eng harn, 14 cm from in-line connector toward fuel heater)
• (eng harn, 20 cm from oil pressure gauge sensor breakout)
• (eng harn, approx 17 cm from breakout for in-line conn. toward left bulkhead grommet)
• (front of engine, in air intake) intake air temperature sensor
• (left rear of cylinder head) g114
• (lower left front of eng, behind torsional damper) crankshaft position sensor
• (m/t)
• (or 506)
• (right front of eng, near generator bracket) g119
• (top right front of engine) engine coolant temperature sensor
• 2-3 shift solenoid valve
• 379 (or 420)
• A/c request sig
• A/c system
• A/t
• A10
• A11
• A12
• Antilock brakes system
• App 1 5 volt ref
• App 1 ground
• App 1 sig
• App 2 ground
• App 2 sig
• App 3 5 volt ref
• App 3 grd
• App 3 sig
• Automatic transmission
• B10
• B11
• B12
• Battery
• Boost & ckp 5 volt ref
• Boost sensor sig
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• Camshaft posit sens
• Ckp sen grd
• Ckp sens input
• Closure gnd
• Closure signal
• Clutch pedal position switch (top of clutch pedal suport)
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Ect signal
• Fuel lift pump sig
• Fuel pump rly ctrl
• Fuel temp grd
• Fuel temp sig
• Glow plug relay ctrl
• Glow plug sig
• Ground
• High res sig
• Iat sig
• Ignition
• M/t
• Oss high
• Oss low
• Oss sig
• Pnk
• Powertrain control module (pcm) (left side of driver's island on relay bracket)
• Press ctrl sol vlv hi
• Press ctrl sol vlv lo
• Pressure control solenoid valve
• Pump cam 5 volt ref
• Range mode selector
• Red
• S129 (a/t)
• S143
• S180
• S186
• Sensor gnd
• Solenoid valve 1-2 shift
• Solid state
• Stoplamp switch
• Tan
• Tcc pwm solenoid valve
• Tcc/abs brake sw
• Tft sensor
• Timing stepper mtr (high)
• Timing stepper mtr (low)
• Tr switch a
• Tr switch b
• Tr switch c
• Trans input speed sig
• Transmission input shaft speed sensor (left side of transmission, near the middle)
• Transmission output speed sensor (left side of trans- mission, near the middle)
• Transmission speed input
• Transmission temperature sensor
• Vehicle speed sensor calibrator (left side of driver's island under relay bracket)
• Vss out
• Vss signal

6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (2 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (2 of 4) for Chevrolet Forward Control P30 1999:

• (at brake pedal support)
• (eng harn, approx 14 cm from oil pressure gauge sensor breakout)
• (eng harn, approx 14 cm from oil pressure gauge sensor breakout) s184
• (eng harn, approx 32 cm from breakout for battery junction block) s102
• 5 volt ref
• Accelerator pedal position module (attached to accelerator pedal)
• App 1 sensor
• App 2 sensor
• App 3 sensor
• B fuel sol ctrl
• B pump cam sig
• Brake transmission shift interlock (btsi) relay (mounted on top of support bracket at driver's island)
• C closure grd
• C high res sig
• Closure signal
• D ignition
• D sensor ground
• Electronic brake control module (below radiator, on lower crossmember)
• Eng-1 h6
• Engine shut-off solenoid (at fuel injection pump)
• F4 i-3 fuse 9 15a f3
• Fuel sol high
• Fuel sol low
• Fuel sole- noid
• Fuel solenoid driver (on side of fuel injection pump)
• Fuse 15 20a
• G6 ecm-1 fuse 12 20a g5
• G7 stop/haz fuse 11 15a g8
• High
• Hot at all times
• Hot in run
• Hot in run or start
• I/p fuse block
• Ignition timing stepper motor (part of fuel injection pump)
• J6 trans fuse 17 10a j5
• Low
• Optical fuel temperature sensor (part of fuel injection pump assembly)
• Pnk
• Red
• S108
• S185
• S222
• S233
• Tan d
• Torque converter clutch (tcc) & stoplamps switch

6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (3 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (3 of 4) for Chevrolet Forward Control P30 1999:

• (a/t)
• (eng harn, approx 24 cm from in-line connector toward fuel heater) s182
• (left rear of cylinder head) g114
• (m/t)
• (right front of eng, near generator bracket) g119
• 87a
• California
• Ecm-bat fuse 6 20a
• Eng- bat fuse 10 15a
• Federal
• Fuel heater (part of fuel/water separator)
• Fuel lift pump (inside right frame rail)
• Fuel pump prime connector (taped to fuel pump relay breakout)
• Fuel pump relay (on engine firewall relay bracket, under battery junction block)
• Gauges fuse 8 20a
• Hot at all times
• Hot in run and start
• I/p fuse block
• Instrument cluster
• Malfunction indicator lamp (mil)
• Pnk
• Red
• S118
• S144
• S171 (eng harn, approx 7 cm from breakout to a/c compressure refrigerant pressure switch connector)
• S181
• S206
• S207
• S225
• Service throttle soon indicator
• Speed meter
• Tan
• Wait to start indicator
• Wastegate solenoid (top left rear of eng)
• Water in fuel indicator
• Water in-fuel indicator sensor (part of fuel/water separator (filter), rear of intake manifold)

6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (4 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (4 of 4) for Chevrolet Forward Control P30 1999:

• "serv throttle soon" ind
• (a/t)
• (a/t) (m/t)
• (dlc) (partial) (below dash, near steering column)
• (left rear of cylinder head) g114
• (left rear of eng, near firewall) glow plug controller
• (m/t)
• (right front of eng, near generator bracket) g119
• A/c enable
• A/c system
• Antilock brakes system
• App 2 5 volt ref
• Battery
• Battery junction block) s104
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• C4 a
• California
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector
• Eso ctrl
• Federal
• Fuel inject ctrl
• Fusible link (22 ga rust)
• G202 (left interior bulkhead, near relay bracket)
• Glow plug controller (left rear of eng, near firewall)
• Glow plug out
• Glow plug sig
• Grd
• Ground
• Hot at all times
• Ignition
• Left bank glow plugs
• Mil ind ctrl
• Nca
• Pnk
• Powertrain control module (pcm) (left side of driver's island on relay bracket)
• Red
• Right bank glow plugs
• Rly ctrl
• S143
• S168 s110
• S181
• Serial data sig
• Shift sol 1-2 input
• Shift sol 2-3 input
• Tan
• Tcc pwm sol vlv ctrl
• Wait to start ind ctrl
• Wastegate sol ctrl

6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (1 of 3) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (1 of 3) for Chevrolet Forward Control P30 1999:

• (eng harn, approx 6cm from breakout to glowplug controller)
• (rear of left cylinder head) g114
• 1-2 shift sol ctrl
• 2-3 shift sol ctrl
• 5v ref
• A10
• A11
• A12
• A8 a6
• B10
• B11
• B12
• Baro press sens sig
• Barometric pressure (baro) sensor (top left rear of intake manifold)
• Battery feed
• Brake pedal sw in
• Brake/transmission shift interlock relay (mounted on top of steering column support at driver's island)
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (partial) (below dash, near steering column)
• Ebcm
• Ecm-1 fuse 12 20a
• Ecm-bat fuse 6 20a
• Electronic brake control module (below radiator, on lower crossmember)
• Eng speed sens in
• Engine speed sensor (rear of intake manifold, near fuel filter)
• G114 (rear of left cylinder head)
• Ground
• Hot at all times
• Hot in run
• Hot in run or start
• I-3 fuse 9 15a
• I/p fuse block (behind dash panel) (body builder installed)
• Ign feed
• Pnk
• Press ctrl sol (hi)
• Press ctrl sol (lo)
• Range signal a
• Range signal b
• Range signal c
• Red
• S108
• S111 (eng harn, approx 10 cm from starter motor breakout)
• S119
• S133
• S143
• S170
• S200 (dash side of eng harn, approx 16 cm from left bulkhead grommet toward ignition switch)
• Sensor return
• Serial data
• Service trans out
• Speed sensor
• Stoplmp sw in
• Tan
• Tcc pwm sol ctrl
• Tcm ground
• Tft sig
• Throttle position sensor (tps) (right side of fuel injection pump)
• Torque converter clutch (tcc) & stop lamps switch (opens w/brake pedal depressed) (at brake pedal support)
• Tp sens sig
• Transmission input speeed sensor (on left side of transmission, near the middle)
• Transmission control module (tcm) (on left side of driver's island, on relay bracket)
• Vehicle speed sensor (vss) (left side of transmission)
• Vehicle speed sensor (vss) calibrator (left side of driver's island, under relay bracket)
• Vehicle speed sig
• Vss
• Vss input
• Vss out
• Vss rtn
• Vss sig

6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (2 of 3) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (2 of 3) for Chevrolet Forward Control P30 1999:

• "wait to start" glow plugs
• (a/t)
• (m/t)
• (rear of left cylinder head)
• (rear of left cylinder head) g114
• (right front of eng, near generator bracket)
• (taped to fuel pump relay breakout) fuel pump prime connector
• 1-2 shift solenoid
• 2-3 shift solenoid
• Automatic transmission (rear of engine)
• Ecm-1 fuse 12 20a
• Ecm-bat fuse 6 20a
• Fuel injection pump shut-off solenoid (at fuel injection pump)
• Fuel lift pump (on inside right frame rail)
• Fuel pump relay (on engine firewall bracket, under battery junction block)
• G114
• G114 (rear of left cylinder head)
• G119
• Gauges fuse 8 20a
• Hot at all times
• Hot in run or start
• I/p fuse block (behind dash panel) (body builder installed)
• Instrument cluster
• Nca
• Orn
• Pnk
• Pressure control solenoid
• Red
• S108
• S118
• S143
• S170
• S207
• S218
• Service trans
• Speedo meter
• Tcc pwm solenoid
• Trans fuse 17 10a
• Transmission fluid temperature (tft) sensor
• Transmission range (tr) pressure switch assembly
• Water in- fuel

6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (3 of 3) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (3 of 3) for Chevrolet Forward Control P30 1999:

• (a/t)
• (eng harn, approx 11 cm from breakout for gerator)
• (m/t)
• (part of fuel/water separator (filter), rear of intake manifold) water in-fuel indicator sensor
• (rear of left cylinder head)
• 10a
• A/t
• Acc
• Battery feed
• Battery junction block (on left rear of eng compt)
• Clutch pedal position (cpp) switch (closed with clutch pedal depressed) (on top of clutch pedal support)
• Cold advance solenoid engine coolant temperature switch (on rear lower portion of right cylinder head, near exhaust manifold)
• Crank fuse (upper right side of steering column support)
• D100 (engine harn, approx 25 cm from breakout for battery junction block)
• Eng-1 fuse 15 20a
• Fuel heater (rear of intake manifold, part of fuel/ water separator)
• Fuel injection pump cold advance solenoid (at fuel injection pump)
• Fusible link (22 ga rust)
• G114
• G119 (right front of eng, near generator bracket)
• Glow plug controller (left rear of eng, near firewall)
• Glow plug ctrl
• Glow plug out
• Glow plug relay tell tale relay (on relay bracket. left sdie of interior bulkhead)
• Ground
• Hot at all times
• Hot in run or start
• I/p fuse block (behind dash panel) (body builder installed)
• Idle speed control actuator solenoid (on bracket on front fuel injection pump)
• Ign feed
• Ignition switch
• Ind lamp out
• Left bank glow plugs
• Lock
• M/t
• Not used
• Off
• Park/neutral position (pnp) & back-up lamps switch (closed in park or neutral) (left side near middle of transmission)
• Pnk
• Red
• Right bank glow plugs
• Run
• S stud
• S109 (eng harn, approx 11 cm from breakout for fuel pump & starter relay
• S110
• S115
• S116
• S118
• S168
• S172 (eng harn, approx 13 cm from breakout for cold advance solenoid)
• Start
• Starter feed
• Starter relay (on eng firewall relay bracket, under battery junction block)
• Starter solenoid (on starter, at lower right side of engine)
• Stud

7.4L

7.4L VIN J, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Forward Control P30 1999:

• (left side of transmission near the middle) transmission output speed sensor
• (on lower right front of engine, behind torsional damper) crankshaft position sensor
• (on throttle valve assembly) idle air control valve
• 1-2 shift sol ctrl
• 1x cmp sig
• 2-3 shift sol ctrl
• 4x ckp sig
• Anti- lock brakes system
• Camshaft position sensor (internal to distributor)
• Ckp low
• Cmp low
• Ect signal
• Egr posit input
• Feed ign a pnk
• Fuel gauge
• G117 (right rear of eng)
• Heated oxygen sensor (ho2s) bank 2 sensor 1 (on right exhaust down pipe, before catalytic converter)
• Ho2s high
• Ho2s low
• Iac a high
• Iac b high
• Iac high
• Iac low
• Iat signal
• Ign feed
• Injector 1 ctrl
• Injector 2 ctrl
• Injector 3 ctrl
• Injector 4 ctrl
• Injector 5 ctrl
• Injector 6 ctrl
• Injector 7 ctrl
• Injector 8 ctrl
• Ks signal
• Left knock sensor (on lower left side of engine)
• Maf signal
• Map signal
• Nca
• Pnk
• Pnk d
• Pwm tcc sol ctrl
• Right knock sensor (on lower right side of engine)
• S131 (eng harn, 13 cm from breakout for egr, toward map sensor)
• Sens rtn
• Sens sig
• Sensor rtn
• Tan
• Tan a
• Tft signal
• Tp signal
• Vehicle control module (vcm) (comm: left side of radiator support, motor home: top of radiator support)
• Vss
• Vss low
• Vss signal

7.4L VIN J, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Forward Control P30 1999:

• Automatic transmission
• Ecm-1 fuse 12 20a
• Eng-1 fuse 15 20a
• Exhaust gas recirculation valve solenoid (top left side of eng)
• Fluid temperature sensor (internal)
• Force motor
• Fuel inj 1
• Fuel inj 2
• Fuel inj 3
• Fuel inj 4
• Fuel inj 5
• Fuel inj 6
• Fuel inj 7
• Fuel inj 8
• G117 (right rear of eng)
• Heated oxygen sensor (ho2s) bank 1 sensor 1 (on left exhaust system down pipe, before catalytic converter)
• Heated oxygen sensor (ho2s) bank 1 sensor 2 (on left exhaust system, after catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 2 (on right exhaust system after catalytic converter)
• Hot in run and start
• I/p fuse block
• Ignition
• Intake air temp sensor (mounted in fresh air intake behind air filter box)
• Nca
• Pnk
• Pnk d
• Pnk e
• Pnk n pressure switch
• Pnk pnk
• Red
• Red p pressure
• S104
• S121
• S133
• S135
• S158
• S159
• Solenoid
• Solenoid 1-2
• Solenoid 2-3
• Switch
• Tan
• Tan a

7.4L VIN J, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Forward Control P30 1999:

• (body builder)
• (eng harn, 4cm from breakout for cruise control module, toward relays)
• (eng harn, 7 cm from breakout for left front wheel speed sensor, toward eng) s127
• (left frame rail in front of fuel tank) g416
• A/c compressor high pressure cut-off switch (on rear of a/c compressor)
• Eng-bat fuse 10 15a f1
• Engine coolant temperature sensor (on top front of engine)
• Fuel gauge
• Fuel pump module (on top of fuel tank)
• G117 (right rear of eng)
• G119 (on top of thermostat housing)
• Gauges fuse 8 20a
• Hot at all times
• Hot in run and start
• I/p fuse block
• Instrument cluster
• Malfunction indicator lamp (mil) (service engine soon)
• Manifold absolute pressure (map) sensor (top center front of engine)
• Mass air flow sensor (right front of engine comp, on air intake assembly)
• Nca
• Pnk
• R102 (eng harn, approx 23 cm from breakout to maf & iat sensor)
• Red
• S119 (eng harn, 4 cm from ect & a/c compressor clutch breakout)
• S120
• S126
• S132 (eng harn, at resistor r102, in pcm breakout, 20 cm from main harness toward fuel pump relay)
• S140
• S206
• S211
• S235
• S400
• Speed meter
• Tach
• Throttle position sensor (on throttle body, top of engine)
• Trans fuse 17 10a

7.4L VIN J, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Forward Control P30 1999:

• (i/p harn, 15 cm from breakout for abs module) s170
• 87a
• A pnk
• A/c comp cyl sw
• A/c rec
• A/c relay
• A/c request signal
• Air conditioning system
• Anti-lock brakes system
• Aux elect cooling fan
• B +
• Battery feed
• Brake signal
• Brake/transmission shift interlock (btsi) relay (comm: behind left side of dash, on relay bracket, motor home: on top of steering support at driver's island)
• Check engine lp ctrl
• Cooling fans system
• Cruise control module (on radiator support bracket)
• Cruise ctrl engaged
• Cruise engaged sig
• Ctrl est
• Cylinder 1
• Cylinder 2
• Cylinder 3
• Cylinder 4
• Cylinder 5
• Cylinder 6
• Cylinder 7
• Cylinder 8
• Data link connector (dlc) (below dash, near steering column)
• Distributor
• Ecm-b fuse 6 20a
• Egr valve feed
• Egr vlv ctrl
• Egr/map 5v ref
• Evaporative emission canister purge valve (top left center of engine)
• Fuel level module
• Fuel pmp rly ctrl
• Fuel pump prime connector (taped to fuel pump relay breakout)
• Fuel pump relay (comm: on eng firewall relay bracket, behind steering column, motor home: on right side of driver's island)
• G117 (right rear of eng)
• G119 (on top of thermostat housing)
• G202 (below left side of dash)
• Ground
• High voltage coil wire
• Hot at all times
• Hot in run
• I-3 fuse 9 15a
• I/p fuse block
• Ic cntrl
• Ign feed
• Ignition coil (on bracket at rear of intake plenum)
• Ignition control module (on bracket at rear of intake plenum)
• Input speed sens high
• Input speed sens low
• Pcs high
• Pcs low
• Pnk
• Pnk a
• Purge canister sol
• Range signal a
• Range signal b
• Range signal c
• Red
• S101
• S102 (eng harn, 25 cm from breakout for windshield wiper motor)
• S114
• S116
• S126
• S143
• Sens ground
• Sensor ground
• Serial data
• Signal timing ctrl elec spk
• Spark plugs
• Speed sensor input
• Tcc stoplamp switch (opens w/brake depressed) (at brake pedal support)
• Tcc/stoplamp input
• Tp sig 5v ref
• Transmission input speed sensor (left side of transmission, near the middle)
• Vcm ground
• Vehicle control module (vcm) (comm: left side of radiator support, motor home: top of radiator support)
• Vss output signal

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Back-up Lamps Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

• (left side of transmission) back-up lamps switch
• A a
• A/t
• Hot in run
• I/p fuse block
• Left backup lamp
• M/t
• Park/neutral position (pnp) & backup lamp switch (left side of transmission)
• Right backup lamp
• S403 (rear lamps harness, 65-120 cm from inline conn, near left rear frame rail)
• Turn b/u fuse 5 15a
• Turn signal flasher

Back-up Lamps Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Back-up Lamps Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999:

• Hot in run
• I/p fuse block
• Left backup lamp
• Park/neutral position (pnp) & backup lamp switch (left side of transmission)
• Pnk
• Provision for backup lamps
• Right backup lamp
• S105 (engine harn, 4 cm from heater oxygen sensor breakout)
• S119

Exterior Lamps Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Exterior Lamps Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

• (dash harness headlamp switch breakout, 8 cm before i/p fuse block breakout) s208
• (forward lamps harn, 25 cm from eng harn to dash harn in line conn breakout) s101
• (rear lamps harness, 55-110 cm from rear chassis harness to rear lamps harness, near left frame rail and fuel tank) s402
• Backup lamps circuit
• C205 provisions for marker lamps (near i/p fuse block)
• Engine controls system (w/ diesel)
• G114 (left rear of engine)
• G200 (left interior bulkhead, near relay bracket)
• G416 (left rear frame rail)
• Hazard
• Hazard lamps flasher (on inner left side of steering column support bracket)
• Head
• Headlamps switch
• Hot at all times
• Hot in run
• I/p fuse block
• Instrument cluster
• Interior lamps system
• Left front park & turn signal lamp
• Left front side marker lamp
• Left license lamps
• Left rear side marker lamp
• Left turn ind.
• Nca
• Normal
• Off
• Park
• Provision for center high mounted stop lamp
• Right front park & turn signal lamp
• Right front side marker lamp
• Right license lamps
• Right rear side marker lamp
• Right tail/stop & turn signal lamps
• Right turn ind.
• S103
• S104 (forward lamps harn, 17 cm from right lamps breakout)
• S105 (forward lamps harn, 122 cm before right lamps breakout)
• S218
• S222
• S401
• S404 (rear lamps harness, 5 cm from right tail- lamps breakout)
• S405 (rear lamps harness, 5 cm from left taillamps breakout)
• Stop
• Stop haz fuse 11 15a
• Tail
• Tail lamps fuse 7 20a
• Tail/stop & turn signal lamps
• Torque converter clutch & stop lamps switch (at base of brake pedal support)
• Turn
• Turn b/u fuse 5 15a
• Turn left
• Turn right
• Turn signal flasher
• Turn signal switch

Exterior Lamps Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Exterior Lamps Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999:

• (7.4l)
• (forward lamp harn, 5 cm from left head- lamp breakout) s172
• (forward lamp harn, 5 cm from right headlamp breakout) s176
• (right rear frame rail) g417
• Back-up lamps circuit
• Cruise control system
• Engine controls system
• G114 (left rear of engine block)
• G119 (right front of engine)
• Hazard
• Hazard lamps flasher (inner left side of steering column support bracket)
• Head
• Headlamps switch
• Hot at all times
• Hot in run
• I/p fuse block
• Instrument cluster
• Interior lamps system
• K nca
• Left front park & turn signal lamp
• Left front side marker lamp
• Left license lamp
• Left rear side marker lamp
• Left tail, stop & turn signal lamp
• Left turn indic
• Nca
• Normal
• Off
• Park
• Provision for center high mounted stop lamp
• Provisions for marker lamps
• Right front park & turn signal lamp
• Right front side marker lamp
• Right license lamp
• Right rear side marker lamp
• Right tail, stop & turn signal lamp
• Right turn indic
• S117 (engine harn, 7 cm from engine harn to forward lamps harn inline connector)
• S126
• S175 (forward lamp harn, 9 cm from right headlamp breakout)
• S206
• S213 (dash harness, 15 cm from headlamp switch connector)
• S401
• S402 (rear lamp harness, rear of vehicle)
• S404 (rear lamp harness, rear of vehicle)
• S405 (rear lamp harness, rear of vehicle)
• Stop haz fuse 11 15a
• Tail lps fuse 7 20a
• Torque converter clutch & stop lamps switch (brake pedal support bracket)
• Turn
• Turn b/u fuse 5 15a
• Turn left
• Turn right
• Turn signal flasher
• Turn signal switch

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram, Commercial Chassis (1 of 2) for Chevrolet Forward Control P30 1999

List of elements for Ground Distribution Wiring Diagram, Commercial Chassis (1 of 2) for Chevrolet Forward Control P30 1999:

• (body builder installed)
• (forward lamps harn, 4cm after first horn breakout)
• (i/p harn, 4cm before i/p fuse block breakout)
• (left interior bulkhead, near relay bracket)
• 87a
• A/c compressor clutch
• A/c compressor refrigerant pressure switch
• A/c compressor relay
• Auxilary engine coolant fan motor
• Auxiliary engine coolant fan a/c pressure switch
• Battery
• Braided strap
• Brake/ transmission shift interlock solenoid
• Brake/ transmission shift interlock solenoid relay
• Data link connector
• Daytime running lamps control module
• Daytime running lamps relay
• Diesel
• Electronic brake control module
• Engine block
• Engine coolant level switch
• Fuel level sensor
• Fuel pump (diesel)
• Fuel pump module
• G113 (left front frame rail)
• G114 (rear of left cylinder head)
• G200
• G416 (left rear frame rail)
• Gas
• Gasoline
• Glowplug relay (mechanical)
• High note horn
• I/p dimmer switch
• Left headlamp
• Left park/ turn signal lamp
• Left side marker lamp
• Low note horn
• Park brake indicator switch
• Right headlamp
• Right park/ turn signal lamp
• Right side marker lamp
• S103
• S110 (engine harn, 4cm from brake pressure differential breakout)
• S110 (engine harn, near left bulkhead connector)
• S168 (engine harn, 3.5cm from battery junction block breakout)
• S205
• S401 (rear lamps harn)
• S406 (chassis harn, near breakout to g416)
• Seat belt alarm module
• Secondary battery (diesel only)
• Starter relay
• Steering column

Ground Distribution Wiring Diagram, Commercial Chassis (2 of 2) for Chevrolet Forward Control P30 1999

List of elements for Ground Distribution Wiring Diagram, Commercial Chassis (2 of 2) for Chevrolet Forward Control P30 1999:

• (a/t)
• (engine harn, near throttle position sensor)
• (m/t)
• (pcm)
• (vcm)
• 5.7l
• A/c compressor high pressure cut off switch
• A/c compressor high pressure cutoff switch
• A/t
• A/t output speed sensor shield
• Brake pressure differential switch
• Data link connector
• Diesel
• Elec
• Electronic brake control module
• Firewall)
• Fuel heater
• Fuel pump
• Fuel pump relay
• Fuel pump relay (diesel)
• G114 (left rear of engine)
• G117 (left rear of engine)
• G119 (right front of engine)
• Gasoline
• Glowplug controller
• Glowplug controller (california)
• Glowplug controller (federal)
• Heated oxygen sensor bank 1 sensor 1
• Heated oxygen sensor bank 1 sensor 2
• Heated oxygen sensor bank 2 sensor 1
• Heated oxygen sensor bank 2 sensor 2
• Ignition control module
• Instrument cluster
• M/t
• Mass air flow sensor
• Mech
• Nca
• Powertrain control module
• Powertrain/ vehicle control module
• S118 (a/t)(engine harn, near glowplug controller breakout) (m/t)(engine harn, near starter motor breakout)
• S118 (engine harn, left rear of engine)
• S138
• S161 (ebcm harn, 15cm from right wheel speed sensor breakout)
• S218 (i/p harn, 6cm before i/p fuse block breakout)
• Starter relay
• Transmission control module (diesel)
• Vehicle control module
• Vehicle speed sensor calibrator (diesel)
• Vehicle speed sensor shield
• Water in fuel indicator sensor

Ground Distribution Wiring Diagram, Motor Home Chassis (1 of 2) for Chevrolet Forward Control P30 1999

List of elements for Ground Distribution Wiring Diagram, Motor Home Chassis (1 of 2) for Chevrolet Forward Control P30 1999:

• (6.5l) (7.4l)
• (body builder installed)
• (fwd lamp harn, near right headlamp breakout)
• (fwd lamp harn, near right headlamp breakout)
• 6.5l
• 7.4l
• A/c compressor high pressure cutoff switch
• A/t output speed sensor shield
• Battery
• Braided strap
• Daytime running lamp relay
• Electronic brake control module
• Engine block
• Fuel heater (6.5l)
• Fuel pump relay
• G111 (near battery)
• G113 (left frame rail)
• G113 (left front frame rail)
• G115 (near ignition coil)
• G117 (rear of right cylinder head)
• Glowplug controller (6.5l california)
• Glowplug controller (6.5l federal)
• Heated oxygen sensor bank 1 sensor 1 (7.4l)
• Heated oxygen sensor bank 1 sensor 2 (7.4l)
• Heated oxygen sensor bank 2 sensor 1 (7.4l)
• Heated oxygen sensor bank 2 sensor 2 (7.4l)
• High note horn
• Ignition control module
• Left headlamp
• Left inner headlamp
• Left outer headlamp
• Low note horn
• Mass air flow sensor
• Park/ neutral position switch relay
• Powertrain control module
• R100 (near a/c compressor clutch)
• Right headlamp
• Right inner headlamp
• Right outer headlamp
• S135 (7.5l: engine harn, near o2 sensor breakout) (6.5: eng harn, near glow plug controller breakout)
• S168 s126 (engine harn, near cruise control module breakout)
• S174
• Secondary battery (diesel only)
• Starter relay
• Stop lamp resistor
• Vehicle control module
• W/ dual headlights
• W/o drl
• W/o dual headlights
• Water in fuel indicator sensor (6.5l)

Ground Distribution Wiring Diagram, Motor Home Chassis (2 of 2) for Chevrolet Forward Control P30 1999

List of elements for Ground Distribution Wiring Diagram, Motor Home Chassis (2 of 2) for Chevrolet Forward Control P30 1999:

• (6.5l)
• (7.4l)
• (body builder installed)
• 6.5l diesel
• 7.4l
• 87a
• A/c compressor clutch
• A/c compressor refrigerant pressure switch
• Audio alarm
• Auxiliary engine coolant fan a/c pressure switch
• Auxiliary engine coolant fan motor
• Brake pressure differential switch
• Brake/ trans- mission shift interlock solenoid relay
• Brake/ transmission shift interlock solenoid
• Cruise control module
• Data link connector
• Daytime running lamps control module
• Daytime running lamps relay
• Electronic brake control module
• Engine coolant fan motor
• Engine coolant level switch
• Fuel level sensor
• Fuel lift pump
• Fuel pump module
• G116 (left side of firewall)
• G125 (top of thermostat housing)
• G202 (left side of dash)
• G416 (left rear frame rail)
• Headlamps/ panel dimmer switch
• I/p dimmer switch
• I/p fuse block
• Inline to steering column harness
• Instrument cluster
• Left side marker lamp
• Nca
• Park brake actuator position switch
• Park brake alarm relay
• Park brake pressure valve solenoid
• Park brake pull button relay
• Park brake pump motor
• Park brake pump relay
• Pulse wiper control module
• Right side marker lamp
• S101 (engine harn, 16 cm from breakout for auxiliary coolant fan motor)
• S143 (6.5l: engine harn, near coolant fan motor) (7.4l: engine harn, 5 cm from breakout to cruise control module)
• S150 (engine harn, near breakout to battery junction block)
• S150 (engine harn, near main wiring pass through at firewall)
• S167 (in abs harness)
• S204 (engine harn, near main wiring pass through at firewall)
• S206 (i/p harn, 25cm from breakout to instrument panel)
• S400 (in rear chassis harness)
• Vechile control module (7.4l) powertrain control module (6.5l)
• Vehicle speed sensor calibrator

HEADLIGHTS

Headlight Wiring Diagram, Commercial Chassis with DRL for Chevrolet Forward Control P30 1999

List of elements for Headlight Wiring Diagram, Commercial Chassis with DRL for Chevrolet Forward Control P30 1999:

• (left rear of engine) g114
• Acc
• Daytime running lamps control module (attached to i/p harness)
• Daytime running lamps relay (left side of dash, on relay bracket)
• Diode network (on i/p harness)
• Drl indicator
• Fog lamps
• G200 (left interior bulkhead, near battery bracket)
• Gauges fuse 8 20a
• Ground
• Head
• Headlamp dimmer switch
• Headlamps switch
• Hi beam indicator
• Hi bm indicator
• Hi bm input
• Hot at all times
• Hot in run or start
• I/p fuse block
• Ignition
• Ignition switch
• Instrument cluster
• Lamp feed
• Left head- lamp
• Lock
• Off
• Park
• Park brake in
• Park brake indicator switch (on park brake lever)
• Pnk
• Provision for fog lamps
• Red
• Relay control
• Right head- lamp
• Run
• S103
• S143
• S202 (i/p harn, approx 16cm before i/p fuse block breakout)
• S204
• S205
• S206
• S207
• S257 (i/p harn, approx 24cm from i/p fuse block breakout)
• Start
• Tan

Headlight Wiring Diagram, Commercial Chassis without DRL for Chevrolet Forward Control P30 1999

List of elements for Headlight Wiring Diagram, Commercial Chassis without DRL for Chevrolet Forward Control P30 1999:

• G114 (left rear of engine)
• G200 (left interior bulkhead, near relay bracket)
• Head
• Headlamp
• Headlamps dimmer switch
• Headlamps switch
• Hi beam indicator
• Hot at all times
• Instrument cluster
• Left hi headlamp
• Off
• Park
• Red
• Right lo
• S103
• S206
• S218
• Tan

Headlight Wiring Diagram, Motor Home Chassis with Dual Headlamps with DRL for Chevrolet Forward Control P30 1999

List of elements for Headlight Wiring Diagram, Motor Home Chassis with Dual Headlamps with DRL for Chevrolet Forward Control P30 1999:

• (body builder installed)
• (forward lamps harn, 12cm to breakout for left headlamp) s171
• (provision for fog lamps)
• (top of thermostat housing) g125
• Acc
• Daytime running lamps module (attached to i/p harness)
• Daytime running lamps relay (on top of steering column support)
• Daytime running lamps relay 2
• Drl indicator
• Fog lamps
• G202 (left side of dash)
• Gauges fuse 20a
• Ground
• Head
• Head- lamp dimmer switch
• Headlamps switch
• Hi beam indicator
• Hi bm indicator
• Hi bm input
• Hot at all times
• Hot in run or start
• I/p fuse block
• Ignition
• Ignition switch
• Instrument cluster
• Lamp feed
• Left head- lamp
• Left high beam head- lamp
• Lock
• Off
• Park
• Park brake in
• Park brake indicator switch (on park brake lever)
• Pnk
• Red
• Relay control
• Right head- lamp
• Right high beam head- lamp
• Run
• S125
• S174
• S204
• S206
• S207 (i/p harn, 20cm from engine harn connector)
• S209
• S211
• Start
• Tan
• Warning systems

Headlight Wiring Diagram, Motor Home Chassis with Dual Headlamps without DRL for Chevrolet Forward Control P30 1999

List of elements for Headlight Wiring Diagram, Motor Home Chassis with Dual Headlamps without DRL for Chevrolet Forward Control P30 1999:

• (body builder installed)
• (forward lamp harn, 12cm to breakout for left headlamp)
• G125 (top of thermostat housing)
• Head
• Head- lamp
• Headlamps dimmer switch
• Headlamps switch
• Hi beam indicator
• Hot at all times
• Instrument cluster
• Left hi head- lamp
• Left high beam head- lamp
• Off
• Park
• Red
• Right high beam head- lamp
• Right lo
• S174
• S206
• S215
• Tan

Headlight Wiring Diagram, Motor Home Chassis with Single Headlamps with DRL for Chevrolet Forward Control P30 1999

List of elements for Headlight Wiring Diagram, Motor Home Chassis with Single Headlamps with DRL for Chevrolet Forward Control P30 1999:

• (body builder installed)
• (provision for fog lamps)
• (top of thermostat housing) g125
• Acc
• Daytime running lamps module (attached to i/p harness)
• Daytime running lamps relay (on top of steering column support)
• Drl indicator
• Fog lamps
• G202 (left side of dash)
• Gauges fuse 20a
• Ground
• Head
• Head- lamp dimmer switch
• Headlamps switch
• Hi beam indicator
• Hi bm indicator
• Hi bm input
• Hot at all times
• Hot in run or start
• I/p fuse block
• Ignition
• Ignition switch
• Instrument cluster
• Lamp feed
• Left head- lamp
• Lock
• Off
• Park
• Park brake in
• Park brake indicator switch (on park brake lever)
• Pnk
• Red
• Relay control
• Right head- lamp
• Run
• S125
• S174
• S204
• S207 (i/p harn, 20cm from engine harn connector)
• S209
• S211
• S218
• Start
• Tan
• Warning system

Headlight Wiring Diagram, Motor Home Chassis with Single Headlamps without DRL for Chevrolet Forward Control P30 1999

List of elements for Headlight Wiring Diagram, Motor Home Chassis with Single Headlamps without DRL for Chevrolet Forward Control P30 1999:

• (body builder installed)
• G125 (top of thermostat housing)
• Head
• Headlamp
• Headlamps dimmer switch
• Headlamps switch
• Hi beam indicator
• Hot at all times
• Instrument cluster
• Left hi headlamp
• Off
• Park
• Red
• Right lo
• S174
• S206
• S215
• Tan

HORN

Horn Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Horn Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

• (behind dash panel)
• (body bulder installed)
• 1995 vftc c
• G202 (behind left side of dash)
• High a note horn (body bulder installed)
• Horn relay (behind left side of dash)
• Horn switch
• Horn/dm fuse 3 20a
• Hot at all times
• I/p fuse block
• Low f note horn (body bulder installed)
• Nca
• S100 (forward lamp harness, approx 43 cm from horn breakout)
• S103
• S204
• S205
• Slip ring
• Steering column

Horn Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Horn Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999:

• (behind dash panel)
• 1995 vftc c
• C c203
• Diesel only
• G100 (body builder installed)
• G207 (top of steering column)
• High a note horn (body bulder installed)
• Horn relay (behind left side of dash)
• Horn switch
• Horn/dm fuse 3 20a
• Hot at all times
• I/p fuse block (body bulder installed)
• Inline connector (provisions for body builder)
• Low f note horn (body bulder installed)
• Nca
• S100 (forward lamp harness, 27 cm from left headlamp breakout)
• S101
• S104
• S150
• S201
• S234 (gas) (gas: i/p harness, 35 cm from steering column harness breakout; diesel: i/p harness, 23 cm from p100, toward turn signal switch connector)
• Slip ring
• Steering wheel

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Instrument Cluster Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

• (abs harn, 10 cm from 7-pin black in-line connector toward abs)
• (behind left radiator support) power brake booster fluid flow indicator/alarm switch
• (behind left radiator support) power brake booster pump pressure switch
• (i/p harn, 24cm from
• (in eng harn, approx 11 cm from a/c comp clutch breakout)
• (left interior bulkhead, near relay bracket)
• (left rear frame rail)
• (not used)
• Abs ind
• Accy
• Anti-lock brakes system
• Brake ind
• Brake pressure differential switch (internal to electronic brake conrol module)
• Check gauges ind
• Coolant temperature gauge
• Daytime running lamp (drl) module (attached to i/p harn) (body builder installed)
• Diesel
• Diode network (dash harn, 15cm from i/p fuse block)
• Door ajar ind
• Drl ind
• Ecm 1 fuse 12 20a
• Electronic brake control module (ebcm) (below radiator, on lower crossmember)
• Eng 1 fuse 15 20a
• Engine controls or starting/charging system
• Engine controls system
• Engine coolant level switch (on lower left end of radiator surge tank)
• Engine coolant temperature gauge sensor (4.3l: on left rear side of left cylinder head) (5.7l: on left cylinder head, between two front spark plugs) (6.5l & 7.4l: on left front side of cylinder head)
• Engine oil pressure gauge sensor (7.4l: on eng block, top rear, behind distributor) others: on top left rear of eng)
• Exterior lights system
• Fuel gauge
• Fuel sender (on top of fuel tank)
• G114 (left rear of engine)
• G200
• G416
• Gas
• Gauges fuse 8 20a
• Hand brake
• Headlights system
• Headlights system
• Hi beam ind
• Hot in run or start
• I/p fuse block (body builder installed)
• I/p fuse block)
• Ignition switch
• Illumination
• In-line connector provisions for body builder
• Instrument cluster
• Interior lights system
• Left turn ind
• Lock
• Low coolant ind
• Malfunction ind (mil) (service engine soon ind)
• Nca
• Off
• Oil pressure gauge
• P/b booster fluid flow alarm (taped to dash harn at breakout to dash fuse block & headlamps switch)
• Park brake booster fluid flow indicator/ alarm delay module (body builder installed)
• Pnk
• Right turn ind
• Run
• S110
• S116
• S118
• S161
• S165
• S169
• S201 (i/p harn, 16 cm from stop lamp switch breakout)
• S205
• S207
• S218
• S257
• S406
• Seat belt ind
• Service throttle soon ind
• Speedometer
• Start
• Tachometer
• Tan
• Trans ind
• Transmissions system
• Vehicle control module (on left side of radiator support)
• Voltmeter
• Vss calibrator (left side of driver's island, under relay bracket)
• W/ drl
• W/o drl
• Wait to start ind
• Warning systems
• Water in fuel ind
• Water-in fuel indicator sensor (part of fuel/ water seperater (filter), rear of intake manifold)

Instrument Cluster Wiring Diagram, Motor Home Chassis (1 of 2) for Chevrolet Forward Control P30 1999

List of elements for Instrument Cluster Wiring Diagram, Motor Home Chassis (1 of 2) for Chevrolet Forward Control P30 1999:

• (a/t)
• (left rear frame rail)
• (left side of dash)
• Abs ind
• Accy
• Anti-lock brakes system
• Auto park ind
• Brake ind
• Bulb test
• Check gauges ind
• Coolant temperature gauge
• Diesel
• Door ajar ind
• Drl ind
• Ecm 1 fuse 12 20a
• Engine controls or starting/ charging system
• Engine controls system
• Engine coolant level switch (on lower left end of radiator surge tank)
• Engine coolant temperature gauge sensor (4.3l: on left rear side of left cylinder head) (5.7l: on left cylinder head, between two front spark plugs) (6.5l & 7.4l: on left front side of cylinder head)
• Engine oil pressure gauge sensor (7.4l: on eng block, top rear, behind distributor) others: on top left rear of eng)
• Exterior lights system
• Fuel gauge
• Fuel sender (on top of fuel tank)
• G114 (left rear of engine)
• G117 (left rear of eng)
• G119 (right front of eng)
• G202
• G416
• Gas
• Gauges fuse 8 20a
• Headlights system
• Headlights system
• Hi beam ind
• Hot in run or start
• I/p fuse block (behind dash panel) (body builder installed)
• Ignition switch
• Illumination
• In-line connector provisions for body builder
• Instrument cluster
• Interior lights system
• Left turn ind
• Lock
• Low coolant ind
• Malfunction ind lamp (mil) (service engine soon ind)
• Off
• Oil pressure gauge
• Pnk
• Right turn ind
• Run
• S101
• S181
• S182
• S206
• S210
• S211
• S400
• Seat belt ind
• Service throttle soon ind
• Speedometer
• Start
• Tachometer
• Tan
• Vehicle control module (on left side of radiator support)
• Voltmeter
• Vss calibrator (left side of driver's island, under relay bracket)
• Wait to start ind
• Warning systems
• Water in fuel ind
• Water-in fuel sensor (part of fuel/ water seperater (filter), rear of intake manifold)

Instrument Cluster Wiring Diagram, Motor Home Chassis (2 of 2) for Chevrolet Forward Control P30 1999

List of elements for Instrument Cluster Wiring Diagram, Motor Home Chassis (2 of 2) for Chevrolet Forward Control P30 1999:

• (abs harn, 10 cm from 7-pins in-line black conn breakout)
• (body builder connector)
• (diesel)
• (eng harn, approx 11 cm from a/c compressor clutch breakout)
• (gas) s230 s190
• (i/p harn, approx 4 cm before i/p fuse block breakout)
• (i/p harn, approx 40 cm before i/p fuse block, toward instrument cluster breakout)
• (left side of dash) g202
• (left side of firewall)
• (mounted to dash) park brake pull button switch
• (not used)
• (top of ther- mostat housing)
• 87a
• Accy
• Brake pressure differential switch (internal to electronic brake conrol module)
• Daytime running lamps module (attached to i/p harness0 (body builder installed)
• Diode d300
• Diode d301
• Diode network (dash harn, 15cm from i/p fuse block)
• Electronic brake control module (ebcm) (below radiator, on lower crossmember)
• G115 (near ignition coil)
• G116
• G125
• Hot at all times
• Hot in run or start
• I/p fuse block (behind dash panel) (body builder installed)
• Ignition switch
• Lock
• Nca
• Off
• Park brake actuator position switch
• Park brake alarm
• Park brake alarm relay (on i/p harness) (body builder installed)
• Park brake indicator switch (body builder installed)
• Park brake pull button relay (on i/p harness) (body builder installed)
• Park/neutral position switch relay (on right side of driver's island)
• Pnk
• Red
• Run
• S135
• S165
• S167
• S169
• S203 (dash harn, 76cm from fuse block)
• S204
• S205
• S207
• S212
• S363
• S364
• Shift interlock system
• Start
• W/ drl
• W/o drl

INTERIOR LIGHTS

Interior Light Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Interior Light Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

• (6)
• (left interior bulkhead, near relay bracket) g200
• Breakout)
• C207
• Dim
• Dome lamp switch
• Exterior lights system
• G114 (left rear of engine)
• Head
• Headlamps switch
• High
• Horn dim fuse 3 20a
• Hot at all times
• I/p fuse block
• I/p lamps dimmer switch
• Instr lps fuse 16 5a
• Instrument cluster
• Light switch
• Off
• Panel lamps switch
• Park
• Provision for dome lamp
• Provision for marker lamps
• S204
• S205
• S218
• Seat belt alarm module (attached to i/p fuse block)
• Tail lps fuse 7 20a
• Transmission range indicator lamp

Interior Light Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Interior Light Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999:

• (6)
• (dash harn, 15 cm from head- lamp switch conn)
• (left side of dash) g202
• Dim
• Dome lamp switch
• Exterior lights system
• G125 (top of thermostat housing)
• Head
• Headlamps switch
• High
• Horn dm fuse 3 20a
• Hot at all times
• I/p fuse block
• I/p lamps dimmer switch
• Instr lps fuse 16 5a
• Instrument cluster
• Lamp
• Light switch
• Off
• Panel lamps switch
• Park
• Provision for dome b
• Provision for roof marker lamps
• S201
• S204
• S206
• S213
• Seat belt alarm module (attached to i/p fuse block)
• Tail lps fuse 7 20a
• Transmission range lamp

POWER DISTRIBUTION

Power Distribution Wiring Diagram, Commercial Chassis (1 of 4) for Chevrolet Forward Control P30 1999

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (1 of 4) for Chevrolet Forward Control P30 1999:

• (105a)
• (diesel a/t-engine harness, approx 19 cm from a/c compresssor clutch relay, others-engine harness, approx 11 cm from steering column connector breakout) s144
• (diesel-engine harness, 4-16 cm from starter motor breakout, gasoline-engine harness, 7 cm from generator jumper breakout) s112
• (i/p harness, approx 20 cm from fuse block breakout) s204
• (others)
• A/c compressor relay
• A12
• Accessory junction block (left interior bulkhead, near relay bracket)
• Auxiliary engine coolant fan relay (diesel only)
• B a8
• B b8
• Batt bus
• Battery
• Battery junction block (left side of engine bulkhead)
• C13
• D13
• Data link connector
• Diesel
• Dome lamp (provisions for)
• Ecm- bat fuse 6 20a
• Electronic brake control module
• Eng- bat fuse 10 15a
• Fuel pump relay
• Fusible link (10 ga- rust)
• Gas
• Generator
• Glow plug controller (diesel)
• Hazard lamp flasher
• Headlamps switch
• Horn relay
• Horn/ dm fuse 3 20a
• I/p fuse block (dash panel provided by body builder)
• Powertrain control module
• Pwr bus
• Pwr circuit breaker 30a
• Red
• Remote battery access terminal block (rear of right radiator core support panel)
• S134
• S206 (i/p harness, approx 12 cm before dash fuse block breakout)
• Seat belt alarm module
• Secondary battery (diesel only)
• Starter relay
• Starter solenoid
• Stop- haz fuse 11 15a
• Stud
• Tail lps fuse 7 20a
• To ignition switch (diagram 2 of 4)
• Torque converter clutch & stoplamps switch
• Transmission control module (a/t only)
• Vehicle control module
• W/deluxe school bus option

Power Distribution Wiring Diagram, Commercial Chassis (2 of 4) for Chevrolet Forward Control P30 1999

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (2 of 4) for Chevrolet Forward Control P30 1999:

• (4.3l)
• (engine harness, approx 5 cm from right glowplug breakout) s116
• (engine harness, approx 18 cm from right engine breakout)
• (engine harness, approx 6 cm before mass air flow sensor breakout) s116
• (i/p harness, approx 15 cm after i/p fuse block breakout) s211
• A a6
• A b6
• A c6
• A d6
• A/t
• Acc
• Acc bus
• Acc radio fuse 4 10a
• Automatic transmission
• Auxiliary engine coolant fan relay
• Camshaft position sensor (4.3l)
• Camshaft position sensor (5.7l)
• Clutch pedal position switch
• Cold advance solenoid and engine coolant temperature switch
• Crank fuse 18 10a
• Crk (start)
• Diesel
• Eng-1 fuse 15 20a
• Engine shut-off solenoid
• Evap canister vent valve (4.3l)
• Evaporative emissions canister purge valve
• From fusible link (diagram 1 of 4)
• Fuel heater
• Fuel solenoid driver
• Gas
• Glow plug controller
• Heated oxygen sensor bank 1 sensor 1
• Heated oxygen sensor bank 1 sensor 2
• Heated oxygen sensor bank 2 sensor 1
• Heated oxygen sensor bank 2 sensor 2
• I/p fuse block (dash panel provided by body builder)
• Ignition switch
• In-line fuse block (near right side of steering column)
• Lock
• M/t
• Mass air flow sensor (4.3l/ 5.7l)
• Off
• On (run)
• Park/neutral position and backup lamps switch
• Pnk
• Provisions for windshield washer motor
• Red
• S139
• To ecm-1 fuse (diagram 3 of 4 and diagram 4 of 4)
• To i/p fuse block: (diagram 4 of 4)
• Trans fuse 17 10a
• Water- in-fuel indicator sensor
• Windshield wiper & washer switch
• Wiper fuse 14 25a

Power Distribution Wiring Diagram, Commercial Chassis (3 of 4) for Chevrolet Forward Control P30 1999

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (3 of 4) for Chevrolet Forward Control P30 1999:

• (engine harness, 9cm from breakout to right oxygen sensor) s108
• (engine harness, approx 10 cm from breakout to right side of engine crossover harness) s108
• (engine harness, near ignition control module)
• 4.3l vin w
• 5.7l vin r
• Crankshaft position sensor
• Ecm-1 fuse 12 20a
• From eng-1 fuse (diagram 2 of 4)
• Fuel injector
• I/p fuse block (dash panel provided by body builder)
• Ignition coil
• Ignition control module
• Instrument cluster
• Pnk
• S145
• Vehicle control module

Power Distribution Wiring Diagram, Commercial Chassis (4 of 4) for Chevrolet Forward Control P30 1999

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (4 of 4) for Chevrolet Forward Control P30 1999:

• (diesel assembly harn, near fuel heater)
• (engine harness, 8cm from vcm breakout) s133
• (engine harness, approx 19 cm pnk
• (engine harness, approx 26 cm from bulkhead grommet)
• (i/p harness, approx 40 cm before i/p fuse block breakout)
• 105a
• 1996 vftc c
• 6.5l engine
• A/c compressor relay
• A/t
• Aux circuit breaker 13 30a
• Aux fuse 30a
• Back up lamps switch
• C11
• C12
• C16
• Daytime running lamp relay
• Daytime running lamps control module
• Diesel
• Ecm-1 fuse 12 20a
• Electronic brake control module
• From breakout to steering column connector) s132
• From eng 1 fuse (diagram 2 of 4)
• From ignition switch (diagram 2 of 4)
• Fuel heater
• Fuel injection pump shut-off solenoid
• Fuel pump relay (mech)
• Gas
• Gauges fuse 8 20a
• Generator
• Glow plug controller (calif)
• Glow plug controller (federal)
• Htr bus
• Htr fuse 1 25a
• I a4
• I b4
• I c4
• I-3 fuse 9 15a
• I/p fuse block (dash panel provided by body builder)
• Ign bus
• Instrument cluster
• Instrument lamps fuse 5a
• Interior lights system
• Interior lights system (i/p lamps dimmer switch)
• M/t
• Others
• Park/ neutral position and backup lamps switch
• Pnk
• Powertrain control module (elec)
• S108
• S182
• S207
• Seat belts alarm module
• Torque converter clutch & stop lamps switch
• Transmission control module (a/t)
• Turn signal flasher
• Turn- b/u fuse 5 15a
• Vehicle control module (vcm)
• Vehicle speed sensor calibrator
• Water in fuel indicator sensor

Power Distribution Wiring Diagram, Motor Home Chassis (1 of 4) for Chevrolet Forward Control P30 1999

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (1 of 4) for Chevrolet Forward Control P30 1999:

• (7.4l vin j-engine harness, 44 cm from breakout for left wheel speed sensor, 6.5l-engine harness, 20 cm from breakout of main harness)
• (i/p harn, near bulkhead connector)
• (i/p harness, 10 cm from breakout for i/p fuse block)
• 6.5l vin f
• 7.4l
• 7.4l vin j
• A/c compressor relay
• Alternator
• Battery
• Battery junction block (on forward left side of the bulkhead)
• Buss bar
• C13
• Connector for dome lamp
• D13
• Data link connector
• Diesel
• Ecm- bat fuse 6 20a
• Electronic brake control module
• Eng- bat fuse 10 15a
• Fan control relay
• Fuel pump relay
• Fusible link (10 ga. red)
• Fusible link (10 ga. rust)
• Glow plug controller
• Hazard flasher
• Headlamps switch
• Horn relay
• Horn/ dm fuse 3 20a
• I/p fuse block (mounted on the dash)
• Ignition switch (diagram 2 of 4)
• Park brake pump motor relay
• Powertrain control module
• Pwr circuit breaker 2 30a
• Red
• Red a
• S114
• S125 (7.4l-engine harness 5 cm from breakout for egr 6.5l-engine harness, 9 cm from breakout for generator)
• S201
• S215 (i/p harness, 35 cm from i/p fuse block)
• S235
• Seatbelt and lamps alarm module
• Secondary battery (diesel only)
• Starter motor
• Starter relay
• Stop- haz fuse 11 15a
• Stoplamp switch
• Tail lamps fuse 7 20a
• Vehicle control module

Power Distribution Wiring Diagram, Motor Home Chassis (2 of 4) for Chevrolet Forward Control P30 1999

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (2 of 4) for Chevrolet Forward Control P30 1999:

• (7.4l: eng harn, 58cm from main passthrough 6.5l: eng harn, 7.5cm from a/c harn breakout)
• (engine harn, 11 cm from break- out to a/c compressor clutch)
• (engine harn, 15 cm from breakout to abs conn) pnk
• (i/p harn, 20cm from relay sockets) s207
• (i/p harn, 25cm from fuse panel) s157
• (i/p harn, 25cm from instrument cluster breakout)
• (i/p harn, 6cm from dimmer switch)
• 6.5l vin f
• 7.4l vin j
• Acc
• Acc radio fuse 4 10a
• Automatic transmission
• Camshaft position sensor
• Crank fuse 18 10a
• Daytime running lamp control module
• Diesel
• Diode network
• Eng-1 fuse 20a
• Engine coolant level switch
• Engine shut off solenoid
• Evaporative emissions canister purge valve solenoid
• Fan control relay
• From fusible link (diagram 1 of 4)
• Fuel solenoid driver
• Heated oxygen sensor bank 1 sensor 1
• Heated oxygen sensor bank 1 sensor 2
• Heated oxygen sensor bank 2 sensor 1
• Heated oxygen sensor bank 2 sensor 2
• I/p fuse block (mounted on the dash)
• Ignition switch
• Instrument cluster
• Lock
• Mass air flow sensor
• Nca
• Off
• Park brake alarm
• Park brake alarm relay
• Park brake low pressure indicator switch
• Park brake pull button relay
• Park brake pull button switch
• Park brake switch
• Park/ neutral position and backup lamps switch
• Park/neutral position and backup lamps switch
• Pnk
• Pnk a
• Pnk a1
• Pnk c
• Red
• Run
• S104
• S133
• S169
• S185 (diesel assy harn, 14 cm from oil pressure gauge sensor breakout)
• S206
• S212
• S217 (i/p harn, 18cm from i/p fuse block)
• S228 (engine harn, 28 cm from bulkhead grommet)
• Start
• To aux fuse (diagram 4 of 4)
• To gauges fuse (diagram 4 of 4)
• Trans fuse 17 10a
• Windshield
• Wiper fuse 14 25a
• Wiper motor

Power Distribution Wiring Diagram, Motor Home Chassis (3 of 4) for Chevrolet Forward Control P30 1999

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (3 of 4) for Chevrolet Forward Control P30 1999:

• (6.5l-engine harness, 16cm from bulkhead grommet) s121
• (diesel assy harness, near fuel heater)
• (engine harness, 28 cm from breakout for injectors)
• (fuel injector harness, 7 cm from breakout for injector 5) s158
• (fuel injector harness, 7 cm from breakout for injector 5) s159
• 6.5l vin f
• 7.4l vin j
• C11
• C12
• California
• Crankshaft position sensor
• Ecm-1 fuse 12 20a
• Federal
• From gauges fuse diagram 4 of 4)
• Fuel heater
• Glowplug controller
• I/p fuse block (mounted on the dash)
• Ignition coil
• Ignition control module
• Injector
• Instrument cluster
• Pnk
• Powertrain control module
• S121
• S182
• Vehicle control module
• Vehicle speed sensor calibrator
• Wastegate solenoid
• Water in fuel indicator sensor

Power Distribution Wiring Diagram, Motor Home Chassis (4 of 4) for Chevrolet Forward Control P30 1999

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (4 of 4) for Chevrolet Forward Control P30 1999:

• (7.4l-engine harness, 52 cm from breakout for map sensor, 6.5l-engine harness, 33 cm from breakout for windshield wiper switch) s116 (gas) s229 (diesel)
• (engine harness, 34cm from windshield wiper motor breakout) s115
• (i/p harness, 6 cm from breakout for dimmer switch) s211
• 1996 vftc c
• 7.4l vin j engine
• 7.4l vin j engines
• A/c compressor relay
• Aux circuit breaker 13 30a
• Buss bar
• Canadian models
• Cruise control module
• Cruise control switch
• Daytime running lamp control module
• Daytime running lamp relay
• Electronic brake control module
• From eng-1 fuse d (diagram 2 of 4)
• From ignition switch (diagram 2 of 4)
• Gauges fuse 8 20a
• Generator
• Htr fuse 1 25a
• I-3 fuse 9 15a
• I/p fuse block (mounted on the dash)
• Instr- lps fuse 16 5a
• Instrument cluster
• Interior lights system
• Interior lights system (instrument panel dimmer switch)
• Nca
• Pnk
• Seatbelt/ lamps alarm module
• To ecm 1 fuse diagram 3 of 4)
• Torque converter clutch and stop lamps switch
• Turn b/u fuse 5 15a
• Turn signal flasher
• Vehicle control module

SHIFT INTERLOCKS

Shift Interlock Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for Shift Interlock Wiring Diagram for Chevrolet Forward Control P30 1999:

• Body builder installed
• Brake/transmission shift interlock (btsi) relay (top of support bracket, at driver's island)
• Brake/transmission shift interlock (btsi) solenoid (on steering column)
• Electronic brake control module (below radiator on crossmember)
• Hot in run
• Hot in run and start
• I-3 fuse 9 15a
• I/p fuse block
• Park/neutral position and backup lamps switch (left of trans)
• Pnk
• S101
• S116
• S150
• S200 (dash side of eng harn, approx 17 cm from grommet left of bulkhead conn)
• S212
• S231
• To body builder harness
• Torque converter clutch and stop lamps switch (at brake pedal support)

STARTING/CHARGING

Charging Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for Charging Wiring Diagram for Chevrolet Forward Control P30 1999:

• (124a, 145a) c f
• (base)
• (commercial) (motor home)
• (gasoline) (diesel)
• A p
• Bat bat
• Battery
• D s
• Fusible link (10 ga- rust)
• G117 (rear of right cylinder head)
• Gauges fuse 20a
• Generator
• Hot in run and start
• I/p fuse block
• Instrument cluster tach (diesel)
• Pnk
• Power distribution system
• Red
• S112 s125
• S132 s115
• Secondary battery (diesel)
• Starter solenoid

Starting Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Starting Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

• A/t
• Accy
• Battery
• Battery junction block (left rear of engine compt)
• Bulb test
• Charging circuit
• Clutch pedal position switch (top of clutch pedal support)
• Crank fuse 18 10a
• Diesel
• Engine controls (glow plugs)
• Fusible link (10 ga- rust)
• G114 (left rear cylinder head)
• G117 (rear of right cylinder head)
• G200 (left kick panel, near relay bracket)
• Gas
• Hold- in coil
• I/p fuse block (behind dash panel)
• Ignition switch
• Lock
• M/t
• Off
• Park/ neutral position & back-up lamps switch (left side of transmission)
• Pull- in coil
• Red
• Run
• S09 (diesel)
• S110
• S112
• S118
• Secondary battery (diesel)
• Start
• Starter motor
• Starter relay (on engine firewall relay bracket)
• Starter solenoid

Starting Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Starting Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999:

• Accy
• Battery
• Battery junction block (left rear of engine compt)
• Bulb test
• Charging circuit
• Crank fuse 18 10a
• Fusible link (10 ga- rust)
• G117 (rear of right cylinder head)
• Hold- in coil
• I/p fuse block (behind dash panel)
• Ignition switch
• Lock
• Off
• Park/ neutral position & back-up lamps switch (left side of transmission)
• Pull- in coil
• Red
• Run
• S125
• S135
• Secondary battery (diesel)
• Start
• Starter motor
• Starter relay (right side of driver's island support)
• Starter solenoid

TRANSMISSION

4.3L

4.3L VIN W, A/T Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 4.3L VIN W, A/T Wiring Diagram for Chevrolet Forward Control P30 1999:

• (4.3l/5.7l: engine harn, 18 cm from left firewall grommet) (7.4l: dash harn, 15 cm from breakout to abs module)
• (4.3l/5.7l: engine harn, 19 cm from breakout to left firewall grommet) (7.4l: engine harn, 25 cm from breakout to wiper motor)
• (4.3l/5.7l: engine harn, 8 cm from breakout to ect sensor) (7.4l: engine harn, 4 cm from breakout to ground g117)
• (mil)
• (rear of left clinder head) g114 g117 (right rear of engine)
• (rear of left clinder head) g114 g119 (on top of thermostat housing)
• 1-2 shift
• 1-2 shift sol
• 2-3 shift sol
• 2-3 shift solenoid
• 4.3l (vin w), 5.7l (vin r)
• 5v reference
• 7.4l (vin j)
• A/c compressor relay, generator, seat belt/ headlamps alarm module
• A/t fluid pressure manual valve position switch
• A/t input speed sensor (left side of transmission)
• A/t iss hi in
• A/t iss lo in
• Anti-lock brakes, cruise control & shift interlock systems
• Automatic transmission (4l80-e)
• Battery in
• Brake switch input
• Data class ii
• Data link connector (partial) (below dash, near steering column)
• Ecm bat fuse 6 20a
• Ecm-1 fuse 12 20a
• Ect sens input
• Electronic brake control module, cruise control module
• Engine controls system
• Engine coolant temperture sensor (top front of engine)
• Fuel injectors (engine controls system)
• Fuel pump relay & switch
• Gauges fuse 8 20a
• Hot at all times
• Hot in run
• Hot in run or start
• I-3 fuse 9 15a
• I/p fuse block
• Ignition in
• Instrument cluster
• Mil control
• Pcm ground
• Pcs sol hi out
• Pcs sol lo out
• Pnk
• Press ctrl
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• S108 s121
• S118
• S119 (engine harn, near breakout to ect sensor)
• S126
• S133 s116
• S134 s114
• S135
• S138
• S143
• S150
• S170
• S200 s102
• S207 s211
• Sensor ground
• Sensor return
• Service engine soon indicator
• Solenoid
• Tcc pwm
• Tcc pwm sol
• Tcc/ stop lamps switch
• Throttle position sensor (on throttle body)
• Tp sens input
• Trans fluid temp sensor
• Trans fuse 17 10a
• Trans temp sig in
• Vehicle control module (center front of engine compt)
• Vehicle speed sensor (left rear of transmission)
• Vss hi
• Vss lo

5.7L

5.7L VIN R, A/T Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 5.7L VIN R, A/T Wiring Diagram for Chevrolet Forward Control P30 1999:

• (4.3l/5.7l: engine harn, 18 cm from left firewall grommet) (7.4l: dash harn, 15 cm from breakout to abs module)
• (4.3l/5.7l: engine harn, 19 cm from breakout to left firewall grommet) (7.4l: engine harn, 25 cm from breakout to wiper motor)
• (4.3l/5.7l: engine harn, 8 cm from breakout to ect sensor) (7.4l: engine harn, 4 cm from breakout to ground g117)
• (mil)
• (rear of left clinder head) g114 g117 (right rear of engine)
• (rear of left clinder head) g114 g119 (on top of thermostat housing)
• 1-2 shift
• 1-2 shift sol
• 2-3 shift sol
• 2-3 shift solenoid
• 4.3l (vin w), 5.7l (vin r)
• 5v reference
• 7.4l (vin j)
• A/c compressor relay, generator, seat belt/ headlamps alarm module
• A/t fluid pressure manual valve position switch
• A/t input speed sensor (left side of transmission)
• A/t iss hi in
• A/t iss lo in
• Anti-lock brakes, cruise control & shift interlock systems
• Automatic transmission (4l80-e)
• Battery in
• Brake switch input
• Data class ii
• Data link connector (partial) (below dash, near steering column)
• Ecm bat fuse 6 20a
• Ecm-1 fuse 12 20a
• Ect sens input
• Electronic brake control module, cruise control module
• Engine controls system
• Engine coolant temperture sensor (top front of engine)
• Fuel injectors (engine controls system)
• Fuel pump relay & switch
• Gauges fuse 8 20a
• Hot at all times
• Hot in run
• Hot in run or start
• I-3 fuse 9 15a
• I/p fuse block
• Ignition in
• Instrument cluster
• Mil control
• Pcm ground
• Pcs sol hi out
• Pcs sol lo out
• Pnk
• Press ctrl
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• S108 s121
• S118
• S119 (engine harn, near breakout to ect sensor)
• S126
• S133 s116
• S134 s114
• S135
• S138
• S143
• S150
• S170
• S200 s102
• S207 s211
• Sensor ground
• Sensor return
• Service engine soon indicator
• Solenoid
• Tcc pwm
• Tcc pwm sol
• Tcc/ stop lamps switch
• Throttle position sensor (on throttle body)
• Tp sens input
• Trans fluid temp sensor
• Trans fuse 17 10a
• Trans temp sig in
• Vehicle control module (center front of engine compt)
• Vehicle speed sensor (left rear of transmission)
• Vss hi
• Vss lo

6.5L

6.5L VIN F, A/T Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, A/T Wiring Diagram for Chevrolet Forward Control P30 1999:

• 1-2 shift
• 1-2 shift sol
• 2-3 shift sol
• 2-3 shift solenoid
• 3-2 shift
• 3-2 shift sol
• A/c compressor relay, generator & turbo charger power valve
• A/t fluid pressure manual valve position switch
• A/t input speed sensor (left side of transmission)
• A/t iss sens hi in
• A/t iss sens lo in
• A/t output speed sensor (left side of transmission)
• A12
• Accelerator pedal position module (attached to accelerator pedal)
• App 1 5v ref
• App 1 signal in
• App 2 5v ref
• App 2 signal in
• App 3 5v ref
• App 3 signal in
• Automatic transmission (4l80-e)
• B10
• B12
• Battery in
• Brake switch in
• C11
• C12
• C13
• C14
• C15
• Class ii data
• D11
• D12
• D13
• Data link connector (partial) (below dash, near steering column)
• Ecm-1 fuse 12 20a
• Ecm-bat fuse 6 20a
• Ect sensor in
• Electronic brake control module
• Engine coolant temperature sensor (top front of engine)
• Exterior lights
• Fuel pump relay & fuel pump switch/engine oil pressure indicator sensor
• G119 (top of thermostat housing)
• Gauges fuse 8 20a
• Hazard lamps flasher
• Hot at all times
• Hot in run
• Hot in run or start
• I-3 fuse 9 15a
• I/p fuse block
• Ignition in
• Indicator
• Instrument cluster
• Mil control
• Oss hi in
• Oss in
• Oss lo in
• Oss out
• Pcm ground
• Pcs sol hi out
• Pcs sol lo out
• Pnk
• Powertrain control module (left side of driver's island)
• Press ctrl solenoid
• Red
• S114
• S119 (engine harn, 13 cm from ground g117)
• S143
• S200 (eng harn, dash side near ignition switch)
• S202 (dash harn, 7 cm from breakout to wiper switch)
• S211
• S224 (engine harn, 16 cm from left bulkhead grommet)
• S229
• S232
• Sensor ground
• Service engine soon (mil)
• Solenoid
• Stop-haz fuse 11 15a
• Stoplamp switch in
• Tan
• Tft sensor in
• Torque converter clutch & stoplamp switch
• Trans fluid temp sensor
• Trans range "a"
• Trans range "b"
• Trans range "c"
• Transmission fuse 17 10a
• Vehicle speed sensor calibrator & engine shutoff solenoid
• Vehicle speed sensor calibrator (left side of driver's island)
• Vss in
• Vss out

6.5L VIN Y, A/T Wiring Diagram, with Electronic Engine Controls for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, A/T Wiring Diagram, with Electronic Engine Controls for Chevrolet Forward Control P30 1999:

• 1-2 shift
• 1-2 shift sol
• 2-3 shift sol
• 2-3 shift solenoid
• 3-2 shift
• 3-2 shift sol
• A/c compressor relay & generator
• A/t fluid pressure manual valve position switch
• A/t input speed sensor (left side of transmission)
• A/t iss sens hi in
• A/t iss sens lo in
• A/t output speed sensor (left side of transmission)
• A12
• Accelerator pedal position module (attached to accelerator pedal)
• App 1 5v ref
• App 1 signal in
• App 2 5v ref
• App 2 signal in
• App 3 5v ref
• App 3 signal in
• Automatic transmission (4l80-e)
• B10
• B12
• Battery in
• Brake switch in
• C11
• C12
• C13
• C14
• C15
• Class ii data
• D11
• D12
• D13
• Data link connector (partial) (below dash, near steering column)
• Ecm-1 fuse 12 20a
• Ecm-bat fuse 6 20a
• Ect sensor in
• Electronic brake control module
• Engine coolant temperature sensor (top front of engine)
• Fuel pump relay & engine oil pressure indicator sensor
• G114 (rear of left cylinder head)
• Gauges fuse 8 20a
• Hot at all times
• Hot in run
• Hot in run or start
• I-3 fuse 9 15a
• I/p fuse block
• Ignition in
• Indicator
• Instrument cluster
• Mil control
• Oss hi in
• Oss lo in
• Oss out
• Pcm ground
• Pcs sol hi out
• Pcs sol lo out
• Pnk
• Powertrain control module (left side of driver's island)
• Press ctrl solenoid
• Red
• S102 (engine harn, 32 cm from breakout to battery junction block)
• S104 (engine harn, 25 cm from breakout to battery junction block)
• S108
• S129 (engine harn, 17 cm from breakout for inline connector toward left bulkhead grommet)
• S143
• S207
• S222
• S225
• S233
• Sensor ground
• Service engine soon (mil)
• Solenoid
• Stop-haz fuse 11 15a
• Stoplamp switch in
• Tan
• Tft sensor in
• Torque converter clutch & stoplamp switch
• Trans fluid temp sensor
• Trans range "a"
• Trans range "b"
• Trans range "c"
• Transmission fuse 17 10a
• Vehicle speed sensor buffer
• Vehicle speed sensor calibrator (left side of driver's island)
• Vss lo in
• Vss out

6.5L VIN Y, A/T Wiring Diagram, without Electronic Engine Controls for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, A/T Wiring Diagram, without Electronic Engine Controls for Chevrolet Forward Control P30 1999:

• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 5 volts ref
• 5v in
• 5v rtn
• A/t input shaft speed sensor (left side of transmission)
• A/t output shaft speed sensor (left side of transmission)
• A10
• A11
• A12
• Automatic transmission (4l80-e)
• B10
• B11
• B12
• Baro sensor input
• Barometric pressure sensor (top left rear of intake manifold)
• Battery feed
• Brake signal
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (partial) (below dash, near steering column)
• Diagnostic test
• Drl module, drl relay & generator
• Ecm-1 fuse 12 20a
• Ecm-bat fuse 6 20a
• Electronic brake control module
• Engine oil pressure indicator sensor & fuel pump relay
• Engine speed sensor (rear of intake manifold)
• Engine speed signal
• Fuel injection pump shutoff solenoid, & fuel pump relay
• G114 (rear of left cylinder head)
• Gauges fuse 8 20a
• Hot at all times
• Hot in run
• Hot in run or start
• I-3 fuse 9 15a
• I/p fuse block
• Ign buss
• Ignition
• Input speed sens hi
• Input speed sens lo
• Instrument cluster
• Oss inputs
• Out
• Pcs hi
• Pcs lo
• Pnk
• Pnk n
• Pressure control solenoid
• Range mode selector
• Range signal a
• Range signal b
• Range signal c
• Red
• Red p
• S108
• S111 (engine harn, 10 cm from generator breakout)
• S119 (engine harn, 6 cm from glow plug switch breakout)
• S133
• S143
• S170
• S200 (engine harn, dash side near ignition switch)
• S207
• Sensor ground
• Serial data
• Service trans ind
• Service transmission indicator
• System ground
• Tan
• Tcc pwm control
• Tcc pwm sol
• Throttle position sensor (right side of fuel injection pump)
• Torque converter clutch/ stoplamp switch
• Tp sensor input
• Trans fluid temp sig
• Trans fuse 17 10a
• Transmission control module (left side of driver's island)
• Transmission temperature sensor
• Vehicle spd output
• Vehicle speed input
• Vehicle speed sensor calibrator

7.4L

7.4L VIN J, A/T Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, A/T Wiring Diagram for Chevrolet Forward Control P30 1999:

• (4.3l/5.7l: engine harn, 18 cm from left firewall grommet) (7.4l: dash harn, 15 cm from breakout to abs module)
• (4.3l/5.7l: engine harn, 19 cm from breakout to left firewall grommet) (7.4l: engine harn, 25 cm from breakout to wiper motor)
• (4.3l/5.7l: engine harn, 8 cm from breakout to ect sensor) (7.4l: engine harn, 4 cm from breakout to ground g117)
• (mil)
• (rear of left clinder head) g114 g117 (right rear of engine)
• (rear of left clinder head) g114 g119 (on top of thermostat housing)
• 1-2 shift
• 1-2 shift sol
• 2-3 shift sol
• 2-3 shift solenoid
• 4.3l (vin w), 5.7l (vin r)
• 5v reference
• 7.4l (vin j)
• A/c compressor relay, generator, seat belt/ headlamps alarm module
• A/t fluid pressure manual valve position switch
• A/t input speed sensor (left side of transmission)
• A/t iss hi in
• A/t iss lo in
• Anti-lock brakes, cruise control & shift interlock systems
• Automatic transmission (4l80-e)
• Battery in
• Brake switch input
• Data class ii
• Data link connector (partial) (below dash, near steering column)
• Ecm bat fuse 6 20a
• Ecm-1 fuse 12 20a
• Ect sens input
• Electronic brake control module, cruise control module
• Engine controls system
• Engine coolant temperture sensor (top front of engine)
• Fuel injectors (engine controls system)
• Fuel pump relay & switch
• Gauges fuse 8 20a
• Hot at all times
• Hot in run
• Hot in run or start
• I-3 fuse 9 15a
• I/p fuse block
• Ignition in
• Instrument cluster
• Mil control
• Pcm ground
• Pcs sol hi out
• Pcs sol lo out
• Pnk
• Press ctrl
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• S108 s121
• S118
• S119 (engine harn, near breakout to ect sensor)
• S126
• S133 s116
• S134 s114
• S135
• S138
• S143
• S150
• S170
• S200 s102
• S207 s211
• Sensor ground
• Sensor return
• Service engine soon indicator
• Solenoid
• Tcc pwm
• Tcc pwm sol
• Tcc/ stop lamps switch
• Throttle position sensor (on throttle body)
• Tp sens input
• Trans fluid temp sensor
• Trans fuse 17 10a
• Trans temp sig in
• Vehicle control module (center front of engine compt)
• Vehicle speed sensor (left rear of transmission)
• Vss hi
• Vss lo

WARNING SYSTEMS

Warning System Wiring Diagrams, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Warning System Wiring Diagrams, Commercial Chassis for Chevrolet Forward Control P30 1999:

• Bulkhead, near relay bracket)
• G200 (left interior
• Gauges fuse 8 20a
• Ground
• Horn/dm fuse 3 20a
• Hot at all times
• Hot in run and start
• Hot w/ park or headlamps switch on
• I/p fuse block
• Instr lps fuse 16 5a
• Instrument cluster
• Lamp on input
• Pnk
• Power (battery)
• Power (ignition)
• S204
• S205
• S207
• S209
• Seat belt input
• Seat belt lamp output
• Seat belts alarm module (at the bottom of the i/p fuse block)

Warning System Wiring Diagrams, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Warning System Wiring Diagrams, Motor Home Chassis for Chevrolet Forward Control P30 1999:

• G202 (left side of dash)
• Gauges fuse 8 20a
• Ground
• Headlamps switch on
• Horn/dm fuse 3 20a
• Hot at all times
• Hot in run and start
• Hot w/ park or
• I/p fuse block
• Instr lps fuse 16 5a
• Instrument cluster
• Lamp on input
• Pnk
• Power (battery)
• Power (ignition)
• S201
• S204
• S211
• S214
• Seat belt switch
• Seat belt tell tale
• Seat belt/lamps alarm module (at the bottom of the i/p fuse block)

WIPER/WASHER

Provisions For Front Wiper/Washer Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Provisions For Front Wiper/Washer Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

• (1996-97) (1998-99)
• (first breakout from bulkhead connector)
• High
• Hot in accy or run
• I/p fuse block
• Low
• Mist
• Off
• Pnk
• Provisions for wiper/washer motor
• Wash
• Windshield wiper and washer switch
• Wiper fuse wiper fuse 14 25a

Provisions For Front Wiper/Washer Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Provisions For Front Wiper/Washer Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999:

• (1996-97,1999) s150 (1998) s203
• (1998-99) g202 (left side of dash)
• 1996-97
• 1998/
• Delay rheo- stat
• G202 (1996-97) (on driver's island)
• High
• Hot in accy and run
• I/p fuse block
• Low
• Mist
• Off
• Pnk
• Provisions for wiper/washer motor
• Pulse
• Pulse wiper control module (strapped to harness under driver's island)
• Wash
• Wiper fuse 14 25a
• Wiper fuse 25a
• Wiper/ washer switch