AIR CONDITIONING – Buick Century Limited 2004 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 2) for Buick Century Limited 2004

List of elements for Automatic A/C Wiring Diagram (1 of 2) for Buick Century Limited 2004:

• (behind right side of dash compt) g200
• (i/p wiring harness, 18 cm from radio breakout) s230
• (i/p wiring harness, 4 cm left of hvac control module breakout)
• (i/p wiring harness, behind center of dash, 4 cm from radio breakout)
• (i/p wiring harness, right side of steering column, 19 cm from radio breakout)
• (lower center of dash) hvac control module
• (on right side of hvac module) vacuum control assembly
• 5 v ref
• A/c solenoid
• Air temp dr ctrl
• Ambient outside air temperature sensor (front of radiator support)
• Ambient temp sig
• Battery
• Bi-level solenoid
• Blower motor (behind right side of dash, in hvac module)
• Blower motor control processor (behind 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
• Heater solenoid
• High blower fuse 30a
• Hot at all times
• Hot in run
• Hvac fuse 10a
• I/p fuse block (behind right side of dash, in right door opening)
• Ign 3 voltage
• Inside air temperature sensor (at left side of dash, 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
• Radio, hvac, rfa, cluster aldl 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 wiring harness, 33 cm from hvac control module connector)
• S233
• S258
• Solid state
• Sp205 (behind data link connector)
• Sun load sig
• Sunload sensor (on top right side of dash, near defogger outlet)
• Tan
• Upper mode sol ctrl

Automatic A/C Wiring Diagram (2 of 2) for Buick Century Limited 2004

List of elements for Automatic A/C Wiring Diagram (2 of 2) for Buick Century Limited 2004:

• (century)
• (cooling fan jumper harness, 19.5 cm from right connector to engine cooling fan motor)
• (cooling fan jumper harness, 20 cm from left connector to engine cooling fan motor)
• (engine wiring harness, front of engine compt, 4 cm from c105 breakout) s105
• (engine wiring harness, left side of engine compt, 4 cm from powertrain control module breakout)
• (fuel injector jumper harness, midway between fuel inj no 3 breakout & map sensor breakout)
• (top left side of engine, below throttle body)
• 5 volt ref
• A/c compressor clutch (on front of a/c compressor)
• 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)
• 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 right front of engine, on transaxle stud, left of starter)
• Hi spd rly ctrl
• Hot at all times
• Ign main relay (closed in run or start)
• Left cooling fan diode (century)
• Left cooling fan motor (on left side of radiator)
• Lo spd rly ctrl
• Low ref
• Nca
• P10
• P11
• Powertrain control module (pcm) (left front side of engine compt, in air cleaner assembly)
• R10
• R11
• Right cooling fan diode (century)
• Right cooling fan motor (on right side of radiator)
• S101
• S102
• S103
• S104
• S121
• S167
• S186 (regal)
• T10
• T11
• U11
• Underhood fuse block (mounted to right front strut tower)
• V10
• V11

Compressor Wiring Diagram for Buick Century Limited 2004

List of elements for Compressor Wiring Diagram for Buick Century Limited 2004:

• (i/p wiring harness, 18 cm from radio breakout)
• (lower right front of engine, on transaxle stud, left of starter)
• (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 (on front of a/c compressor)
• A/c press signal
• A/c refrigerent pressure sensor (at 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
• G113
• G200 (behind right side of dash compt)
• Ground
• Hot at all times
• Hot in run
• Hvac control module (lower center of dash)
• Hvac fuse 10a
• I/p fuse block (behind right side of dash, in right door opening)
• Ign main relay (closed in run or start)
• Ignition
• Low ref
• Manual a/c
• Powertrain control module (pcm) (left front side of engine compt, in air cleaner assembly)
• Rdo, hvac, rfa clstr, aldl fuse 10a
• S105 (engine wiring harness, front of engine compt, 4 cm from c105 breakout)
• S167 (left side of engine compt, 4 cm from powertrain control module breakout)
• S202 (i/p wiring harness, right side of steering column, 19 cm from radio breakout)
• S230
• S233 (i/p wiring harness, behind center of dash, 4 cm from radio breakout)
• Serial data
• Sp205 (behind data link connector)
• Underhood fuse block (mounted to right front strut tower)
• W/ auto a/c

Manual A/C Wiring Diagram for Buick Century Limited 2004

List of elements for Manual A/C Wiring Diagram for Buick Century Limited 2004:

• (behind right side of dash compt) g200
• (cooling fan jumper harness, 19.5 cm from right connector to engine cooling fan motor)
• (cooling fan jumper harness, 20 cm from left connector to engine cooling fan motor)
• (engine wiring harness, front of engine compt, 4 cm from c105 breakout)
• (engine wiring harness, left side of engine compt, 4 cm from powertrain control module breakout)
• (fuel injector jumper harness, midway between fuel inj no 3 breakout & map sensor breakout)
• (i/p wiring harness, 18 cm from radio breakout)
• (i/p wiring harness, behind center of dash, 4 cm from radio breakout)
• (left side of hvac module) left air temperature actuator
• (on left side of radiator)
• (on right side of radiator)
• (regal) s186
• (top left side of engine, below throttle body)
• +5v reference
• A/c compressor clutch (on front of a/c compressor)
• A/c clu diode
• A/c clutch fuse 23 10a
• A/c clutch relay 15
• A/c press signal
• A/c refrigerant 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, in 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 gnd
• Ect signal
• Engine controls system
• Engine coolant temperature (ect) sensor
• F12
• Fan off input
• G200 (behind right side of dash compt)
• Gnd
• Ground
• High blower fuse 30a
• High blower relay
• High speed
• Hot at all times
• Hot in run
• Hvac control module (lower center of dash)
• Hvac fuse 10a
• I/p fuse block (behind right side of dash, in right door opening)
• Ign
• Ign main relay (closed in run or start)
• Ignition
• Interior lights
• Interior lights system
• Lamp dim sig
• Left cooling fan diode (century)
• Left cooling fan motor
• Low blower fuse 20a
• Low reference
• Low speed
• Nca
• Off
• P10
• P11
• Pass temp ctrl
• Pos
• Powertrain control module (pcm) (left front side of engine compt, in air cleaner assembly)
• R10
• R11
• Rdo, hvac, rfa clstr, aldl fuse 10a
• Right air temperature actuator (right side of hvac module)
• Right cooling fan diode (century)
• Right cooling fan motor
• S101
• S102
• S103
• S104
• S105
• S167
• S230
• S233
• T10
• T11
• Tan
• Thermal breakers
• U11
• Underhood fuse block (mounted to right front strut tower)
• V10
• V11