AIR CONDITIONING – Buick Regal LS 2003 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 2) for Buick Regal LS 2003

List of elements for Automatic A/C Wiring Diagram (1 of 2) for Buick Regal LS 2003:

• (behind right side of dash) g200
• (below dash, left side of steering column) g201
• (i/p harn, 18 cm from radio breakout) s230
• (i/p harn, 4 cm from hvac control module breakout)
• (i/p harn, behind center of dash, 4 cm from radio breakout)
• (i/p harn, right side of steering column, 19 cm from radio breakout)
• (on right side of of hvac module) vacuum/ electric solenoid
• 5 v ref
• A/c solenoid
• Air temp dr ctrl
• Ambient air temperature sensor (front of radiator support)
• Ambient temp sig
• Battery
• Bi-level solenoid
• Blower motor (in hvac module)
• Blower motor control processor (right side of dash, in hvac module)
• Blower speed ctrl
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• Class 2 serial data
• Cntrl in
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (dlc) (under left side of dash, right of steering column)
• Def mode sol ctrl
• Defrost solenoid
• Gnd
• Grd
• Heater solenoid
• High blower fuse 30a
• Hot at all times
• Hot in run
• Hvac control module
• Hvac fuse 10a
• I/p fuse block (behind right side of dash)
• Ign 3 voltage
• Inside air temperature sensor (below instrument cluster)
• Inside temp sig
• Interior lights system
• Ip dim sw sig
• Left air temperature actuator (left side of hvac module)
• Low ref
• Lt temp dr pos
• Lwr mode sol ctrl
• Mix-blnd sol ctrl
• Nca
• Radio,hvac, rfa, cluster data link fuse 15a
• Rear defogger system
• Recirc sol ctrl
• Recirc solenoid
• Red
• Right air temperature actuator (right side of hvac module)
• Rr defog rly ctrl
• Rt temp dr ctrl
• Rt temp dr pos
• S202
• S231 (i/p harn, 33 cm from hvac control module breakout)
• S233
• S258
• Solid state
• Sp205 (behind data link connector)
• Spd cntrl
• Sun load sig
• Sunload sensor (top right side of dash, near) defogger outlet)
• Tan
• Upper mode sol ctrl

Automatic A/C Wiring Diagram (2 of 2) for Buick Regal LS 2003

List of elements for Automatic A/C Wiring Diagram (2 of 2) for Buick Regal LS 2003:

• (cool fan jumper harn, 19 cm from right conn to cooling fan motor)
• (cooling fan jumper harn, 19.5 cm from right conn to cooling fan motor) s104
• (cooling fan jumper harn, 20 cm from left conn to cooling fan motor)
• (engine harn, front of engine compt, 4 cm from c105 breakout) s105
• (engine harn, left side of engine compt, 4 cm from pcm breakout)
• (fuel inj jumper harn, midway between fuel inj no 3 breakout & map sensor breakout)
• (top left side of engine, below throttle body)
• 3.1l
• 3.8l
• 5 volt ref
• A/c compressor clutch
• A/c clu diode
• A/c clutch fuse 23 10a
• A/c clutch relay 15
• A/c press signal
• A/c refrigerent pressure sensor (left front strut tower, on a/c liquid line)
• A10
• A11
• C11
• Class 2 ser data
• Clutch rly ctrl
• Cool fan 1 fuse 15a
• Cool fan 2 fuse 15a
• Cool fan 1 relay
• Cool fan 2 relay
• Cool fan 3 relay
• E10
• Ect ground
• Ect signal
• Engine controls system
• Engine coolant temperature (ect) sensor
• F12
• G113 (lower
• Hi spd rly ctrl
• Hot at all times
• Ign main relay (closed in run or start)
• Left coolant fan
• Left cooling fan diode (3.1l)
• Left front of engine)
• Lo spd rly ctrl
• Low ref
• Nca
• Powertrain control module (pcm) (left front side of engine compt, in air cleaner assembly)
• Right coolant fan
• Right cooling fan diode (3.1l)
• S101
• S102
• S103
• S121
• S167
• Underhood fuse block (right side of engine compt, mounted to strut tower)

Compressor Wiring Diagram for Buick Regal LS 2003

List of elements for Compressor Wiring Diagram for Buick Regal LS 2003:

• (i/p harn, 18 cm from radio breakout)
• (i/p harn, right side of steering column, 19 cm from radio breakout)
• (lower left front of engine) g113
• (w/ auto a/c)
• (w/ manual a/c)
• 5 volt ref
• A/c clu diode
• A/c clutch fuse 23 10a
• A/c clutch relay 15
• A/c compressor clutch
• A/c press signal
• A/c refrigerent pressure sensor (left front strut tower, on a/c liquid line)
• A/c request
• Auto a/c
• Battery
• C11
• C12
• Class 2 ser data
• Clutch request
• Clutch rly ctrl
• D12
• Engine controls system
• G200 (behind right side of dash)
• Ground
• Hot at all times
• Hot in run
• Hvac control module
• Hvac fuse 10a
• I/p fuse block (behind right side of dash)
• Ign main relay (closed in run or start)
• Ignition
• Low ref
• Manual a/c
• Powertrain control module (left front side of engine compt, in air cleaner assembly)
• Rdo, hvac, rfa clstr, cel tel fuse 10a
• S105 (engine harn, front of engine compt, 4 cm from c105 breakout)
• S167 (engine harn, 4 cm from pcm breakout)
• S202
• S230
• S233 (i/p harn, behind center of dash, 4 cm from radio breakout)
• Serial data
• Sp205 (behind data link connector)
• Underhood fuse block (right side of engine compt)

Manual A/C Wiring Diagram for Buick Regal LS 2003

List of elements for Manual A/C Wiring Diagram for Buick Regal LS 2003:

• (behind right side of dash) g200
• (cool fan jumper harn, 19 cm from right conn to cooling fan motor)
• (cooling fan jumper harn, 19.5 cm from right conn to cooling fan motor)
• (cooling fan jumper harn, 20 cm from left conn to cooling fan motor)
• (engine harn, front of engine compt, 4 cm from c105 breakout)
• (engine harn, left side of engine compt, 4 cm from pcm breakout)
• (fuel inj jumper harn, midway between fuel inj no 3 breakout & map sensor breakout)
• (i/p harn, 18 cm from radio breakout)
• (i/p harn, behind center of dash, 4 cm from radio breakout)
• (left side of hvac module) left air temperature actuator
• (top left side of engine, below throttle body)
• +5v reference
• 3.1l
• 3.8l
• A/c compressor clutch
• A/c clu diode
• A/c clutch fuse 23 10a
• A/c clutch relay 15
• A/c press signal
• A/c refrigerent pressure sensor (at left front strut tower, on a/c liquid line)
• A/c request sig
• A10
• A11
• Battery
• Blower motor (behind right side of dash, in hvac module)
• Blower motor resistor assembly (under right side of dash, right side of hvac module)
• C11
• Clutch request
• Comp control
• Cool fan 1 fuse 15a
• Cool fan 2 fuse 15a
• Cool fan 1 relay
• Cool fan 2 relay
• Cool fan 3 relay
• Defogger on
• Defogger system
• Drvr temp ctrl
• E10
• Ect ground
• Ect signal
• Engine controls system
• Engine coolant temperature (ect) sensor
• F12
• Fan off input
• G113 (lower
• G200 (behind right side of dash)
• Gnd
• Ground
• High blower fuse 30a
• High blower relay
• High speed
• Hot at all times
• Hot in run
• Hvac control module
• Hvac fuse 10a
• I/p fuse block (behind right side of dash)
• Ign
• Ign main relay (closed in run or start)
• Ignition
• Interior lights
• Interior lights system
• Lamp dim sig
• Left cooling fan
• Left cooling fan diode (3.1l)
• Left front of engine)
• Low blower fuse 20a
• Low reference
• Low speed
• Nca
• Nca nca
• Off
• Pass temp ctrl
• Pos
• Powertrain control module (pcm) (left front side of engine compt, in air cleaner assembly)
• Rdo, hvac, rfa clstr, cel tel fuse 10a
• Right air temperature actuator (right side of hvac module)
• Right cooling fan
• Right cooling fan diode (3.1l)
• S101
• S102
• S103
• S104
• S105
• S121
• S167
• S230
• S233
• Tan
• Underhood fuse block (right side of engine compt, mounted to strut tower)