GMC Forward Control P3500 1999 - 1999 GENERAL MOTORS Forward Control Chassis

GMC Forward Control P3500 1999 - BUZZERS, RELAYS & TIMERS

GMC Forward Control P3500 1999 BUZZERS, RELAYS & TIMERS

Component	Component Location
A/C Compressor Relay (Commercial Van)	On engine firewall relay bracket, under battery junction block. See Fig. 10.
A/C Compressor Relay (Motor Home)	On right side of driver's island. See Fig. 11.
Brake/Transmission Shift Interlock (BTSI) Relay (Commercial Van)	Behind left side of dash, on relay bracket. See Fig. 13.
Brake/Transmission Shift Interlock (BTSI) Relay (Motor Home)	Mounted on top of steering column support at driver's island.
Daytime Running Lamps (DRL) Relay (Commercial Van)	Behind left side of dash, on relay bracket. See Fig. 13.
Daytime Running Lamps (DRL) Relay (Motor Home)	On top of steering column support.
Daytime Running Lamps (DRL) Relay No. 2 (Motor Home)	On forward lamp harness (body builder installed).
Fan Control Relay (Commercial Van)	On engine firewall relay bracket, under battery junction block.
Fan Control Relay (Motor Home)	On top of steering column support, behind steering column.
Fuel Pump Relay (Commercial Van)	On engine firewall relay bracket, under battery junction block. See Fig. 10.
Fuel Pump Relay (Motor Home)	On right side of driver's island. See Fig. 11.
Hazard Lamps Flasher	On inner left side of steering column support bracket.
Horn Relay (Commercial Van)	Behind left side of dash, on relay bracket. See Fig. 13.
Horn Relay (Motor Home)	On top of steering column support.
Park Brake Alarm	On I/P harness (body builder installed).
Park Brake Alarm Relay	On I/P harness (body builder installed).
Park Brake Pull Button Relay	On I/P harness (body builder installed).
Park Brake Pump Motor Relay (Motor Home)	In auto apply park brake component box, on right frame rail behind transmission. See Fig. 12.
Park/Neutral Position (PNP) Switch Relay (Motor Home)	On right side of driver's island. See Fig. 11.
Power Brake Booster Fluid Flow Alarm	Body builder installed.
Starter Relay (Commercial Van)	On engine firewall relay bracket, under battery junction block. See Fig. 10.
Starter Relay (Motor Home)	On right side of driver's island support. See Fig. 11.
Turn Signal Flasher	On I/P fuse block (body builder installed).

GMC Forward Control P3500 1999 - CIRCUIT PROTECTION DEVICES

GMC Forward Control P3500 1999 CIRCUIT PROTECTION DEVICES

Component	Component Location
Accessory Junction Block (School Bus)	Body builder installed.
Battery Junction Block (Commercial Van)	On left side of firewall, above relay bracket. See Fig. 10.
Crank Fuse (Commercial Van)	On upper right side of steering column support. See Fig. 13.
Crank Fuse (Motor Home)	In auxiliary fuse block, right of steering column.
Diode Network	On I/P harness (body builder installed).
I/P Fuse Block	Behind dash panel (body builder installed).

GMC Forward Control P3500 1999 - CONTROL UNITS

GMC Forward Control P3500 1999 CONTROL UNITS

Component	Component Location
Accelerator Pedal Position (APP) Module (Commercial Van)	Attached to accelerator pedal.
Accelerator Pedal Position (APP) Module (Motor Home)	Attached to accelerator pedal. See Fig. 11.
Cruise Control Module	On radiator support bracket.
Daytime Running Lamps (DRL) Module	Attached to I/P harness (body builder installed).
Electronic Brake Control Module (EBCM)	Below radiator, on lower crossmember.
Fuel Balance Pump Module (Dual Tanks Only)	On inside of left frame rail.
Fuel Pump Module	On top center of fuel tank.
Fuel Solenoid Driver (6.5L VIN F)	On side of fuel injection pump. See Fig. 5.
Glow Plug Controller (6.5L VIN F)	On left rear of engine, near firewall.
Glow Plug Controller (6.5L VIN Y)	On left rear of engine, near firewall.
Ignition Control Module (ICM) (4.3L VIN W)	On right top of engine, at ignition coil. See Fig. 1.
Ignition Control Module (ICM) (5.7L VIN R)	On right top of engine, at ignition coil.
Ignition Control Module (ICM) (7.4L VIN J)	On bracket at rear of intake plenum. See Fig. 8.
Power Brake Booster Fluid Flow Indicator/Alarm Delay Module	Body builder installed.
Powertrain Control Module (PCM) (6.5L VIN F)	On left side of driver's island, on relay bracket.
Powertrain Control Module (PCM) (6.5L VIN Y)	On left side of driver's island, on relay bracket.
Seat Belt & Lamps Alarm Module	Attached to I/P fuse block.
Transmission Control Module (TCM) (6.5L VIN F)	On left side of driver's island, on relay bracket.
Transmission Control Module (TCM) (6.5L VIN Y)	On left side of driver's island, on relay bracket.
Vehicle Control Module (VCM) (Commercial Van)	On left side of radiator support. See Fig. 10.
Vehicle Control Module (VCM) (Motor Home)	On top of radiator support.
Vehicle Speed Sensor (VSS) Calibrator (Motor Home)	On left side of driver's island, under relay bracket. See Fig. 11.
Windshield Wiper Pulse Control Module	Tie strapped to engine wiring harness, under driver's island support.

GMC Forward Control P3500 1999 - MOTORS

GMC Forward Control P3500 1999 MOTORS

Component	Component Location
Auxiliary Engine Cooling Fan (6.5L VIN F)	Mounted on front of radiator.
Auxiliary Engine Cooling Fan (6.5L VIN Y)	Mounted on front of radiator.
Engine Coolant Fan Motor	Mounted to radiator.
Fuel Balance Pump (Dual Tanks Only)	On inside of left frame rail.
Fuel Injection Pump (6.5L VIN F)	On top front of engine. See Fig. 5.
Fuel Injection Pump (6.5L VIN Y)	On top front of engine.
Fuel Lift Pump (6.5L VIN F)	On inside right frame rail.
Fuel Lift Pump (6.5L VIN Y)	On inside right frame rail.
Ignition Timing Stepper Motor (6.5L VIN F)	Part of fuel injection pump.
Ignition Timing Stepper Motor (6.5L VIN Y)	Part of fuel injection pump.
Park Brake Pump Motor (Motor Home)	In auto apply park brake component box, on right frame rail behind transmission. See Fig. 12.
Windshield Wiper Motor	Body builder installed.

GMC Forward Control P3500 1999 - SENDING UNITS & SENSORS

GMC Forward Control P3500 1999 SENDING UNITS & SENSORS

Component	Component Location
Barometric Pressure Sensor (6.5L VIN F)	On top left rear of intake manifold.
Barometric Pressure Sensor (6.5L VIN Y)	On top left rear of intake manifold.
Boost Sensor (6.5L VIN F)	On top right center of engine.
Camshaft Position (CMP) Sensor (4.3L VIN W)	Internal to distributor.
Camshaft Position (CMP) Sensor (5.7L VIN R)	Internal to distributor. See Fig. 2.
Camshaft Position (CMP) Sensor (7.4L VIN J)	Internal to distributor. See Fig. 8.
Canister Vent Sensor (Gasoline)	On left side of canister bracket.
Crankshaft Position (CKP) Sensor (4.3L VIN W)	On right front of engine, at crankshaft pulley.
Crankshaft Position (CKP) Sensor (5.7L VIN R)	On right front of engine, at crankshaft pulley.
Crankshaft Position (CKP) Sensor (6.5L VIN F)	On lower left front of engine, behind torsional damper.
Crankshaft Position (CKP) Sensor (6.5L VIN Y)	On lower left front of engine, behind torsional damper.
Crankshaft Position (CKP) Sensor (7.4L VIN J)	On lower right front of engine, behind torsional damper. See Fig. 9.
Engine Coolant Temperature (ECT) Sensor (4.3L VIN W)	On top front of engine. See Fig. 1.
Engine Coolant Temperature (ECT) Sensor (5.7L VIN R)	On top front of engine. See Fig. 3.
Engine Coolant Temperature (ECT) Sensor (6.5L VIN F)	On top right front of engine.
Engine Coolant Temperature (ECT) Sensor (7.4L VIN J)	On top front of engine. See Fig. 9.
Engine Coolant Temperature Gauge Sensor (4.3L VIN W)	On left rear side of cylinder head.
Engine Coolant Temperature Gauge Sensor (5.7L VIN R)	On left cylinder head between two front spark plugs. See Fig. 2.
Engine Coolant Temperature Gauge Sensor (6.5L VIN F)	On left front side of cylinder head. See Fig. 4.
Engine Coolant Temperature Gauge Sensor (6.5L VIN Y)	On left front side of cylinder head.
Engine Coolant Temperature Gauge Sensor (7.4L VIN J)	On left front side of cylinder head. See Fig. 7.
Engine Oil Pressure Gauge Sensor (4.3L VIN W)	On top left rear of engine.
Engine Oil Pressure Gauge Sensor (5.7L VIN R)	On top left rear of engine. See Fig. 2.
Engine Oil Pressure Gauge Sensor (6.5L VIN F)	On top left rear of engine block.
Engine Oil Pressure Gauge Sensor (6.5L VIN Y)	On top left rear of engine block.
Engine Oil Pressure Gauge Sensor (7.4L VIN J)	On engine block, top rear, behind distributor. See Fig. 8.
Engine Speed Sensor (6.5L VIN F)	At rear of intake manifold, near fuel filter.
Engine Speed Sensor (6.5L VIN Y)	At rear of intake manifold, near fuel filter.
Fuel Level Sensor (6.5L VIN F)	On top center of fuel tank.
Fuel Level Sensor (6.5L VIN Y)	On top center of fuel tank.
Fuel Sender (6.5L VIN F)	On top of fuel tank.
Fuel Sender (6.5L VIN Y)	On top of fuel tank.
Fuel Sender & Fuel Pump (Gasoline)	On top of fuel tank.
Fuel Tank Pressure Sensor (Commercial Van) (California Only)	At fuel tank.
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 (4.3L VIN W)	On left exhaust down pipe, before catalytic converter.
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 (5.7L VIN R)	On left exhaust down pipe, before catalytic converter.
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 (7.4L VIN J)	On left exhaust down pipe, before catalytic converter.
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 (4.3L VIN W)	On exhaust system, after catalytic converter.
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 (5.7L VIN R)	On left exhaust system, after catalytic converter.
Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 (7.4L VIN J)	On left exhaust system, after catalytic converter.
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 (4.3L VIN W)	On right exhaust down pipe, before catalytic converter.
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 (5.7L VIN R)	On right exhaust down pipe, before catalytic converter.
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 (7.4L VIN J)	On right exhaust down pipe, before catalytic converter.
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 (5.7L VIN R)	On right exhaust system, after catalytic converter.
Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 (7.4L VIN J)	On right exhaust system, after catalytic converter.
Intake Air Temperature (IAT) Sensor (4.3L VIN W)	Mounted in fresh air intake, behind air filter box.
Intake Air Temperature (IAT) Sensor (5.7L VIN R)	Mounted in fresh air intake, behind air filter box.
Intake Air Temperature (IAT) Sensor (6.5L VIN F)	Top of engine, in air intake.
Intake Air Temperature (IAT) Sensor (6.5L VIN Y)	Front of engine, in air intake.
Intake Air Temperature (IAT) Sensor (7.4L VIN J)	Mounted in fresh air intake, behind air filter box.
Knock Sensor (KS) (4.3L VIN W)	On top center rear of engine.
Knock Sensor (KS) (5.7L VIN R)	On lower right side of engine.
Knock Sensor (KS) (Left) (7.4L VIN J)	On lower left side of engine.
Knock Sensor (KS) (Right) (7.4L VIN J)	On lower right side of engine.
Manifold Absolute Pressure (MAP) Sensor (4.3L VIN W)	Near center of intake manifold, behind air intake. See Fig. 1.
Manifold Absolute Pressure (MAP) Sensor (5.7L VIN R)	Near center of intake manifold, behind air intake.
Manifold Absolute Pressure (MAP) Sensor (6.5L VIN Y)	On center rear of intake manifold.
Manifold Absolute Pressure (MAP) Sensor (7.4L VIN J)	On top center front of engine. See Fig. 9.
Mass Airflow Sensor (4.3L VIN W)	Mounted in fresh air intake, behind air filter box.
Mass Airflow Sensor (5.7L VIN R)	Mounted in fresh air intake, behind air filter box.
Mass Airflow Sensor (7.4L VIN J)	On right front of engine compartment, on air intake assembly.
Optical/Fuel Temperature Sensor (6.5L VIN F)	Part of fuel injection pump assembly. See Fig. 5.
Optical/Fuel Temperature Sensor (6.5L VIN Y)	Part of fuel injection pump assembly.
Throttle Position (TP) Sensor (4.3L VIN W)	On throttle body, top of engine. See Fig. 1.
Throttle Position (TP) Sensor (5.7L VIN R)	On throttle body, top of engine. See Fig. 3.
Throttle Position (TP) Sensor (6.5L VIN F)	On right side of fuel injection pump.
Throttle Position (TP) Sensor (6.5L VIN Y)	On right side of fuel injection pump.
Throttle Position (TP) Sensor (7.4L VIN J)	On throttle body, top of engine. See Fig. 9.
Transmission Input Speed Sensor	On left side of transmission.
Transmission Output Speed Sensor	On left side of transmission.
Vehicle Speed Sensor (VSS)	On left side of transmission.
Water-In-Fuel Indicator Sensor (6.5L VIN F)	Part of fuel/water separator (filter), rear of intake manifold. See Fig. 6.
Water-In-Fuel Indicator Sensor (6.5L VIN Y)	Part of fuel/water separator (filter), rear of intake manifold. See Fig. 6.
Wheel Speed Sensors	On each wheel hub assembly.

GMC Forward Control P3500 1999 - SOLENOIDS & SOLENOID VALVES

GMC Forward Control P3500 1999 SOLENOIDS & SOLENOID VALVES

Component	Component Location
Brake/Transmission Shift Interlock (BTSI) Solenoid (Commercial Van)	On steering column. See Fig. 13.
Brake/Transmission Shift Interlock (BTSI) Solenoid (Motor Home)	On steering column.
CDR Valve	On top of right valve cover.
Engine Shutoff Solenoid (6.5L VIN F)	At fuel injection pump. See Fig. 5.
Evaporative Emissions (EVAP) Canister Purge Valve (4.3L VIN W)	On top right side of engine. See Fig. 1.
Evaporative Emissions (EVAP) Canister Purge Valve (5.7L VIN R)	On top right side of engine. See Fig. 2.
Evaporative Emissions (EVAP) Canister Purge Valve (7.4L VIN J)	On top left center of engine. See Fig. 7.
Evaporative Emissions (EVAP) Canister Vent Valve (Commercial Van) (California Only)	On right frame rail in front of fuel tank.
Exhaust Gas Recirculation (EGR) Valve (4.3L VIN W)	On top front of engine. See Fig. 1.
Exhaust Gas Recirculation (EGR) Valve (5.7L VIN R)	On top front of engine. See Fig. 3.
Exhaust Gas Recirculation (EGR) Valve (7.4L VIN J)	On top left side of engine. See Fig. 7.
Fuel Injection Pump Cold Advance Solenoid (6.5L VIN Y)	At fuel injection pump.
Fuel Injection Pump Shutoff Solenoid (6.5L VIN Y)	At fuel injection pump.
Fuel Solenoid (6.5L VIN F)	In fuel injection pump. See Fig. 5.
Idle Air Control (IAC) Valve (4.3L VIN W)	On throttle body assembly. See Fig. 1.
Idle Air Control (IAC) Valve (5.7L VIN R)	On throttle body assembly. See Fig. 3.
Idle Air Control (IAC) Valve (7.4L VIN J)	On throttle body assembly. See Fig. 9.
Idle Speed Control Actuator Solenoid (6.5L VIN F)	Mounted on bracket on front of fuel injection pump.
Idle Speed Control Actuator Solenoid (6.5L VIN Y)	Mounted on bracket on front of fuel injection pump.
Park Brake Pressure Valve Solenoid (Motor Home)	In auto apply park brake component box at right frame rail behind transmission. See Fig. 12.
Wastegate Solenoid (6.5L VIN F)	On top left rear of engine. See Fig. 4.

GMC Forward Control P3500 1999 - SWITCHES

GMC Forward Control P3500 1999 SWITCHES

Component	Component Location
A/C Compressor High Pressure Cut-Off Switch	On rear of A/C compressor.
A/C Compressor Refrigerant Pressure Switch	On A/C accumulator (body builder installed).
Auxiliary Engine Coolant Fan A/C Pressure Switch (Motor Home)	In A/C compressor high pressure line (body builder installed). See Fig. 11.
Back-Up Lamps Switch (M/T)	On left side of transmission.
Brake Pressure Differential Switch (Commercial Van)	Internal to electronic brake control module.
Brake Pressure Differential Switch (Motor Home)	Internal to electronic brake control module. See Fig. 11.
Clutch Pedal Position Switch	On top of clutch pedal support.
Cold Advance Solenoid Engine Coolant Temperature Switch	On rear lower portion of right cylinder head, near exhaust manifold.
Engine Coolant Level Switch (Commercial Van)	On left lower end of radiator surge tank.
Engine Coolant Level Switch (Motor Home)	On right lower end of radiator surge tank. See Fig. 11.
Evaporative Emissions (EVAP) Canister Purge Vacuum Diagnostic Switch (5.7L VIN R)	On right side of engine.
Evaporative Emissions (EVAP) Canister Purge Vacuum Diagnostic Switch (7.4L VIN J)	On left side of engine.
Park Brake Actuator Position Switch (Motor Home)	In auto apply park brake component box at right frame rail behind transmission. See Fig. 12.
Park Brake Indicator Switch	On parking brake lever (body builder installed).
Park Brake Pressure Indicator Switch (Motor Home)	In auto apply park brake component box at right frame rail behind transmission. See Fig. 12.
Park Brake Pull Button Switch	Mounted to dash.
Park Brake Pump Motor Switch (Motor Home)	In auto apply park brake component box at right frame rail behind transmission. See Fig. 12.
Park Brake Switch (W/O Auto Apply)	On I/P harness (body builder installed).
Park/Neutral Position (PNP) & Back-Up Lamps Switch	On left side, near middle of transmission.
Power Brake Booster Fluid Flow Indicator/Alarm Delay Switch	Behind left radiator support (body builder installed).
Power Brake Booster Pump Pressure Switch	Behind left radiator support (body builder installed).
Stoplights Switch (Motor Home)	At brake pedal support. See Fig. 11.
Torque Converter Clutch (TCC) & Stoplights Switch (Commercial Van)	At brake pedal support. See Fig. 13.
Torque Converter Clutch (TCC) & Stoplights Switch (Motor Home)	At brake pedal support. See Fig. 11.

GMC Forward Control P3500 1999 - MISCELLANEOUS

GMC Forward Control P3500 1999 MISCELLANEOUS

Component	Component Location
Data Link Connector (DLC) (Commercial Van)	Below dash, near steering column. See Fig. 13.
Distributor (4.3L VIN W)	On top rear of engine.
Distributor (5.7L VIN R)	On top rear of engine.
Distributor (7.4L VIN J)	On top rear of engine.
Engine Firewall Relay Bracket	Left rear of engine compartment, under battery junction block.
Fuel Filter/Manager (6.5L VIN F)	Rear of the intake manifold, part of the fuel/water separator. See Fig. 6.
Fuel Filter/Manager (6.5L VIN Y)	Rear of the intake manifold, part of the fuel/water separator. See Fig. 6.
Fuel Heater (6.5L VIN F)	Rear of the intake manifold, part of the fuel/water separator. See Fig. 6.
Fuel Heater (6.5L VIN Y)	Rear of the intake manifold, part of the fuel/water separator. See Fig. 6.
Fuel Pump Prime Connector (Commercial Van)	Taped to fuel pump relay breakout. See Fig. 10.
Fuel/Water Separator (Filter) (6.5L VIN F)	On rear of intake manifold.
Fuel/Water Separator (Filter) (6.5L VIN Y)	On rear of intake manifold.
Glow Plugs (6.5L VIN F)	On cylinder heads, below valve covers.
Glow Plugs (6.5L VIN Y)	On cylinder heads, below valve covers.
Ignition Coil (4.3L VIN W)	On top right side of engine. See Fig. 1.
Ignition Coil (5.7L VIN R)	On top right side of engine. See Fig. 2.
Ignition Coil (7.4L VIN J)	On bracket at rear of intake plenum.
Remote Battery Access Terminal Block	Rear of right radiator core support panel.
Secondary Battery	On right side of frame rail, behind engine.

GMC Forward Control P3500 1999 - CONNECTORS

GMC Forward Control P3500 1999 CONNECTORS

Component	Component Location
C100 (Black, 7 Pin)	At lower left corner of firewall.
C101 (Black, 38 Pin)	Above left rear of intake manifold. See Fig. 4.
C102 (Black, 3 Pin)	Below generator. See Fig. 1.
C103 (Black, 3 Pin)	On top of transmission.
C104 (Black, 2 Pin)	On engine side of firewall, near C100.
C105 (4.3L VIN W) (Black, 12 Pin)	Near steering gearbox. See Fig. 1.
C105 (5.7L VIN R) (Black, 16 Pin)	Near steering gearbox.
C107 (Black, 10 Pin)	Near distributor.
C110 (Commercial Van) (Black, 7 Pin)	Near brake master cylinder.
C110 (Motor Home) (Black, 7 Pin)	Near steering gearbox.
C111 (Commercial Van) (Black, 3 Pin)	Near brake master cylinder.
C111 (Motor Home) (Black, 3 Pin)	Above steering gearbox.
C115	In engine harness, 10 cm from breakout to heated oxygen sensor, bank 2, sensor 1.
C117	In engine harness, 10 cm from breakout to generator.
C200 (Commercial Van) (Black, 36 Pin)	At left side of firewall, left of steering column.
C200 (Motor Home) (Gray, 36 Pin)	At left side of firewall, left of steering column.
C202 (Gray, 36 Pin)	At left side of firewall, left of steering column.
C203 (Commercial Van) (Gray, 36 Pin)	At top of steering column support.
C203 (Motor Home) (Gray, 36 Pin)	At left side of firewall, left of steering column. See Fig. 11.
C204	Marker lights provision for body builder.
C205	Located by body builder.
C207 (Commercial Van) (Black, 7 Pin)	Near battery junction block.
C207 (Motor Home) (Gray, 7 Pin)	Near battery junction block.
C209	Door ajar switch provision for body builder.
C210 (Commercial Van) (Brown, 2 Pin)	Dome light provision for body builder. See Fig. 13.
C210 (Motor Home) (Black, 4 Pin)	On top of steering column support.
C211 (Commercial Van) (Black, 6 Pin)	On top of steering column support. See Fig. 13.
C211 (Motor Home) (Black, 6 Pin)	On top of steering column support.
C212 (Commercial Van)	Park accessory provision for body builder.
C212 (Motor Home)	Foglight provision for body builder.
C213 (Commercial Van)	Foglight provision for body builder.
C213 (Motor Home)	Door ajar signal provision for body builder.
C300 (Motor Home) (Black, 15 Pin)	Near middle of chassis, at outside of left frame rail.
C301 (Motor Home) (Black, 3 Pin)	At left middle of transmission.
C303 (Black, 3 Pin)	At right frame rail, behind transmission.
C400 (Black, 7 Pin)	Behind fuel tank, near left frame rail.
C401 (Commercial Van) (Black, 7 Pin)	On left frame rail, near rear light harness.
C401 (Motor Home) (Black, 7 Pin)	Near left frame rail, near rear of fuel tank.
C402 (Commercial Van) (Black, 2 Pin)	Center high mount stop light provision for body builder.
C402 (Motor Home) (Gray, 4 Pin)	On right frame rail, rear of fuel tank.
C404 (Commercial Van)	Mid-vehicle clearance lights provision for body builder.
C405	Center high mount stop light provision for body builder.

GMC Forward Control P3500 1999 - GROUNDS

GMC Forward Control P3500 1999 GROUNDS

Component	Component Location
G101	Body builder installed.
G102 (Commercial Van)	Body builder installed.
G102 (Motor Home) (4.3L VIN W)	At rear of left cylinder head.
G102 (Motor Home) (5.7L VIN R)	At rear of left cylinder head.
G102 (Motor Home) (6.5L VIN F)	Near generator bracket.
G102 (Motor Home) (6.5L VIN Y)	Near generator bracket.
G103	At rear of right cylinder bank.
G104	At rear of right cylinder head.
G105	At rear of right cylinder head.
G106 (Commercial Van)	Braided strap, at left rear of engine.
G106 (Motor Home)	At rear of left cylinder head.
G107	Front frame crossmember.
G108 (Commercial Van)	On top of thermostat housing.
G108 (Motor Home) (A/T)	At rear of left cylinder head.
G108 (Motor Home) (M/T)	On top of thermostat housing.
G110 (Commercial Van)	On left frame rail, above steering gearbox.
G110 (Motor Home)	Above steering gearbox.
G200 (Commercial Van)	On top of steering column support plate.
G200 (Motor Home)	On top of thermostat housing.
G350	At right frame rail, behind transmission.
G400	At left frame rail, in front of fuel tank.
G401	Body builder installed.
G402	Body builder installed.

GMC Forward Control P3500 1999 - SPLICES

GMC Forward Control P3500 1999 SPLICES

Component	Component Location
S101 (Commercial Van) (4.3L VIN W)	In engine harness, 20 cm from breakout to auxiliary engine coolant fan motor.
S101 (Commercial Van) (6.5L VIN F)	In engine harness, 16 cm from breakout to auxiliary engine coolant fan motor.
S101 (Motor Home)	In forward light harness, 25 cm from C203.
S103	In forward light harness, 110 cm from left lights breakout.
S104 (Motor Home) (4.3L VIN W)	In forward light harness, 17 cm from breakout to right lights.
S104 (Motor Home) (5.7L VIN R)	In forward light harness, 17 cm from breakout to right lights.
S104 (Motor Home) (6.5L VIN F)	In engine harness, 25 cm from breakout to battery junction block.
S104 (Motor Home) (6.5L VIN Y)	In engine harness, 25 cm from breakout to battery junction block.
S105 (Commercial Van)	In engine harness, 4 cm from breakout to heated oxygen sensors.
S105 (Motor Home)	In forward light harness, 122 cm from breakout to right lights.
S106 (Commercial Van) (Resistor Splice)	In engine harness, 7 cm from breakout to engine coolant fan motor.
S107 (Commercial Van) (Resistor Splice)	In engine harness, 7 cm from breakout to engine coolant fan motor.
S107 (Motor Home) (6.5L VIN Y)	In engine harness, at auxiliary engine coolant fan relay fusible link C4.
S108	In engine harness breakout to injector connector C105, 95 cm from main harness.
S110 (Motor Home) (4.3L VIN W)	In engine harness, 4 cm from breakout to C200
S110 (Motor Home) (5.7L VIN R)	In engine harness, 4 cm from breakout to C200
S110 (Motor Home) (6.5L VIN F)	In engine harness, 4 cm from C110.
S110 (Motor Home) (6.5L VIN Y)	In engine harness, 4 cm from C110.
S112 (Motor Home) (A/T)	In engine harness, 16 cm from breakout to starter motor.
S112 (Motor Home) (M/T)	In engine harness, 4 cm from breakout to starter motor.
S113	In engine harness, at starter solenoid interconnect fusible link C3.
S114 (Commercial Van) (4.3L VIN W)	In engine harness, 44 cm from breakout to A/C compressor clutch.
S114 (Commercial Van) (6.5L VIN F)	In engine harness, 19 cm from breakout to fuel pump relay.
S114 (Motor Home)	In engine harness, at starter solenoid interconnect fusible link C3.
S115 (4.3L VIN W)	In engine harness, 14 cm from breakout to C100.
S115 (6.5L VIN F)	In engine harness, 35 cm from main wiring pass-through, at firewall.
S116 (Commercial Van) (4.3L VIN W)	In engine harness, near breakout to C100.
S116 (Motor Home) (4.3L VIN W)	In engine harness, 110 cm from breakout to C110.
S116 (Motor Home) (5.7L VIN R)	In engine harness, 110 cm from breakout to C110.
S116 (Motor Home) (6.5L VIN F)	In engine harness, 50 cm from breakout to C101.
S116 (Motor Home) (6.5L VIN Y)	In engine harness, 50 cm from breakout to C101.
S117	In engine harness, 7 cm from breakout to C100 & C207.
S118	In engine harness, 15 cm from breakout to glow plug controller.
S121	In engine harness, 29 cm from breakout to A/C compressor clutch.
S122	In engine harness, 25 cm from A/C compressor clutch connector.
S124 (Commercial Van)	In engine harness, 11 cm from breakout to cruise control module.
S124 (Motor Home)	In engine harness, 14 cm from breakout to A/C compressor high pressure cut-off switch
S125 (4.3L VIN W)	In engine harness, 5 cm from breakout to EGR.
S125 (6.5L VIN F)	In engine harness, 5 cm from breakout to C111.
S126	In engine harness, 18 cm from breakout to A/C compressor clutch.
S128	In engine harness, at battery junction block fusible link C2.
S129	In engine harness, at battery junction block fusible link C2.
S130	In engine harness, at battery junction block fusible link C3.
S131	In engine harness, at battery junction box fusible link C3.
S132 (Commercial Van) (Resistor Splice)	In breakout to powertrain control module, 20 cm from main harness.
S132 (Motor Home) (4.3L VIN W)	In engine harness, 19 cm from breakout to C200.
S132 (Motor Home) (5.7L VIN R)	In engine harness, 19 cm from breakout to C200.
S132 (Motor Home) (6.5L VIN F)	In engine harness, 11 cm from breakout to C200.
S132 (Motor Home) (6.5L VIN Y)	In engine harness, 11 cm from breakout to C200.
S133 (Commercial Van) (4.3L VIN W)	In engine harness, 11 cm from breakout to A/C compressor clutch.
S133 (Motor Home) (4.3L VIN W)	In engine harness, 8 cm from breakout to VCM.
S133 (Motor Home) (5.7L VIN R)	In engine harness, 8 cm from breakout to VCM.
S133 (Motor Home) (6.5L VIN F)	In engine harness, 30 cm from powertrain control module.
S133 (Motor Home) (6.5L VIN Y)	In engine harness, 30 cm from powertrain control module.
S135 (4.3L VIN W)	In engine harness breakout to ignition coil, 7 cm from main harness.
S135 (6.5L VIN F)	In engine harness, 7 cm from breakout to G104.
S138 (Motor Home) (4.3L VIN W)	In engine harness, 7 cm from breakout to throttle position switch.
S138 (Motor Home) (5.7L VIN R)	In engine harness, 7 cm from breakout to throttle position switch.
S139 (Motor Home) (4.3L VIN W)	In engine harness breakout to camshaft position sensor, 3 cm from main harness.
S139 (Motor Home) (5.7L VIN R)	In engine harness breakout to C105, 18 cm from main harness.
S140 (Resistor Splice)	In breakout to powertrain control module, 20 cm from main harness.
S141 (Resistor Splice)	In engine harness, 23 cm from breakout to mass airflow sensor.
S142 (Resistor Splice)	In engine harness, 23 cm from breakout to mass airflow sensor.
S143 (Commercial Van) (6.5L VIN F)	In engine harness, 14 cm from wiring pass-through, at firewall.
S143 (Motor Home) (4.3L VIN W)	In engine harness, 6 cm from breakout to C200.
S143 (Motor Home) (5.7L VIN R)	In engine harness, 6 cm from breakout to C200.
S143 (Motor Home) (6.5L VIN F)	In engine harness, 16 cm from breakout to A/C compressor clutch.
S143 (Motor Home) (6.5L VIN Y)	In engine harness, 16 cm from breakout to A/C compressor clutch.
S144 (4.3L VIN W)	In engine harness, 11 cm from breakout to C200.
S144 (5.7L VIN R)	In engine harness, 11 cm from breakout to C200.
S144 (6.5L VIN F)	In engine harness, 17 cm from breakout to A/C compressor clutch.
S144 (6.5L VIN Y)	In engine harness, 17 cm from breakout to A/C compressor clutch.
S145	In engine harness, 4 cm from breakout to C105.
S146	In brake warning system harness, at starter solenoid interconnect fusible link C5.
S150 (Commercial Van) (4.3L VIN W)	In engine harness, at battery junction block fusible link C1.
S150 (Commercial Van) (6.5L VIN F)	In engine harness, 14 cm from breakout to main wiring pass-through, at firewall.
S150 (Motor Home)	In engine harness, 18 cm from breakout to C200.
S151	In engine harness, at battery junction block fusible link.
S158	In fuel injection assembly harness.
S159	In fuel injection assembly harness.
S161	In ABS harness, 15 cm from breakout to right front wheel speed sensor.
S166 (Commercial Van) (4.3L VIN W)	In engine harness, 5 cm from breakout to ABS harness.
S166 (Commercial Van) (6.5L VIN F)	In engine harness, 11 cm from breakout to ABS ground.
S166 (Motor Home)	In engine harness, 17 cm from main wiring pass-through, at firewall.
S167	In ABS harness, 19 cm from breakout to brake pressure differential switch.
S168 (Commercial Van)	In engine harness, 4 cm from breakout to C207.
S168 (Motor Home)	In engine harness, 17 cm from main wiring pass-through, at firewall.
S169 (Commercial Van) (4.3L VIN W)	In engine harness, 38 cm from breakout to C100 & C207.
S169 (Commercial Van) (6.5L VIN F)	In engine harness, 8 cm from breakout to the engine coolant level switch.
S169 (Motor Home)	In engine harness, 11 cm from breakout to A/C compressor clutch.
S170	In engine harness, 15 cm from breakout to cruise control module.
S171	In forward light harness, 12 cm from breakout to left headlight.
S172	In forward light harness, 5 cm from breakout to left headlight.
S173	In forward light harness, 9 cm from breakout to left headlight.
S174	In forward light harness, 18 cm from breakout to right headlight.
S175	In forward light harness, 9 cm from breakout to right headlight.
S176	In forward light harness, 5 cm from breakout to right headlight.
S181	In diesel assembly harness, 20 cm from breakout to C101.
S182	In diesel assembly harness, 24 cm from breakout to C101.
S185	In diesel assembly harness, 14 cm from breakout to oil pressure gauge sensor.
S201 (Commercial Van)	In dash harness, 10 cm from breakout to C200.
S201 (Motor Home)	In dash side of engine harness, 16 cm from stoplight switch.
S202	In dash side of engine harness, 7 cm from breakout to wiper switch.
S204 (Commercial Van)	In dash harness, 26 cm from breakout to horn relay.
S204 (Motor Home)	In dash harness, 20 cm from breakout to fuse block.
S205	In dash harness, 4 cm from breakout to fuse block.
S206 (Commercial Van)	In dash harness, 25 cm from breakout to instrument cluster connector.
S206 (Motor Home)	In dash harness, 4 cm from breakout to fuse block.
S207 (Commercial Van)	In dash harness, 20 cm from breakout to C200.
S207 (Motor Home)	In dash harness, 40 cm from breakout to fuse box.
S208	In dash harness headlight switch breakout, 8 cm before fuse block breakout.
S209	In dash harness, 50 cm from breakout to fuse block.
S211	In dash harness, 6 cm from breakout to dimmer switch.
S212	In dash harness, 10 cm from breakout to instrument cluster connector.
S213	In dash harness, 15 cm from breakout to headlight switch.
S214	In dash harness, 18 cm from breakout to instrument cluster light dimmer.
S215	In dash harness, 35 cm from dash fuse block.
S216	In dash harness, 25 cm from dash fuse block.
S218	In dash harness, 28 cm from breakout to fuse block.
S220	In dash harness, 16 cm from breakout to fuse block.
S225	In dash side of engine harness, 16 cm from main wiring pass-through, at firewall.
S228	In dash side of engine harness, 28 cm from main wiring pass-through, at firewall.
S229	In dash side of engine harness, 3 cm from breakout to hazard flasher.
S231	In dash side of engine harness, 7 cm from breakout to turn signal switch.
S233	In dash side of engine harness, 31 cm from breakout to main wiring pass-through, at firewall.
S235 (4.3L VIN W)	In dash side of engine harness, 26 cm from main wiring pass-through, at firewall.
S235 (6.5L VIN F)	In dash side of engine harness, 23 cm from main wiring pass-through, at firewall.
S241 (Resistor Splice)	In dash side of engine harness, 18 cm from breakout to powertrain control module.
S242 (Resistor Splice)	In dash side of engine harness, 18 cm from breakout to powertrain control module.
S257	In dash harness, 24 cm from breakout to fuse block.
S364	In auto-apply park brake harness, 4 cm from breakout to park brake pump motor.
S400	In rear chassis harness, 10 cm from breakout to G400.
S401	In rear light harness, 45 cm from C400.
S402	In rear light harness, 55 cm from C400.
S404 (Commercial Van)	In rear light harness, 5 cm from breakout to left taillight.
S404 (Motor Home)	In rear light harness, 5 cm from right taillights breakout.
S405 (Commercial Van)	In rear light harness, 5 cm from breakout to right taillight.
S405 (Motor Home)	In rear lights harness, 5 cm from breakout to left taillights.
S406	In rear chassis harness, 10 cm from breakout to G400.