Buick Regal Custom 1990 - ELECTRICAL COMPONENT LOCATOR 1989-90 ELECTRICAL COMPONENT LOCATIONS General Motors Corp. - Electrical Components

Buick Regal Custom 1990 - BUZZERS, RELAYS & TIMERS

Buick Regal Custom 1990 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
ABS Front Enable Relay (1989)	At ABS power center. See Fig. 1 .
ABS Front Enable Relay (1990)	At ABS power center. See Fig. 2 .
ABS Pump Motor Relay	On left side of ABS pump motor, below master cylinder.
ABS Rear Enable Relay (1989)	At ABS power center. See Fig. 1 .
ABS Rear Enable Relay (1990)	At ABS power center. See Fig. 2 .
A/C Compressor Control Relay
1989 2.8L & 3.1L	In right side electrical center. See Fig. 1 .
1990 2.3L	In right side electrical center. See Fig. 3 .
1990 3.1L (VIN T)	In right side electrical center. See Fig. 4 .
1990 3.1L (VIN V)	In right side electrical center. See Fig. 5 .
Right Side Electrical Center	In right side electrical center. See Fig. 6 .
A/C-Heater High Blower Relay	In convenience center. See Fig. 7 .
A/C-Heater Lower Blower Relay	In convenience center. See Fig. 7 .
Cooling Fan Relay
1989 2.8L & 3.1L	In right side electrical center. See Fig. 1 .
Right Side Electrical Center	In right side electrical center. See Fig. 6 .
Cooling Fan Relay (Heavy Duty)	In right side electrical center. See Fig. 6 .
1990 2.3L	In right side electrical center. See Fig. 3 .
1990 3.1L (VIN T)	In right side electrical center. See Fig. 4 .
1990 3.1L (VIN V)	In right side electrical center. See Fig. 5 .
Defogger/Timer Relay	In convenience center. See Fig. 7 .
Fog Light Relay	In forward light electrical center. See Fig. 8 .
Fuel Pump Relay
1989 2.8L & 3.1L	In left side electrical center. See Fig. 1 .
1990 2.3L	In left side electrical center. See Fig. 3 .
1990 3.1L (VIN T)	In left side electrical center. See Fig. 4 .
1990 3.1L (VIN V)	In left side of electrical center. See Fig. 5 .
Left Side Electrical Center	In left side electrical center. See Fig. 9 .
Hazard Flasher Relay	In convenience center. See Fig. 7 .
Horn Relay
w/Fog Lights	In forward light electrical center. See Fig. 8 .
w/o Fog Lights	On bracket, at front of right fender panel.
Power Antenna Relay	On bracket, at base of antenna.
Power Door Lock Relay	On right kick panel, above center access hole.
Turn Signal Flasher Relay	Behind instrument cluster, to right of steering column.

Buick Regal Custom 1990 - CIRCUIT PROTECTION DEVICES

Buick Regal Custom 1990 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
ABS Controller Fuse	In ABS power center. See Fig. 2 .
ABS Elect. Valve Fuse	In ABS power center. See Fig. 2 .
ABS Power Center	On radiator support, above right headlight. See Fig. 2 .
Automatic Seat Belts Fuse	In convenience center. See Fig. 7 .
Circuit Breakers
Defogger Timer/Relay	In convenience center. See Fig. 7 .
Headlights	In convenience center. See Fig. 7 .
Power Accessories	In convenience center. See Fig. 7 .
Power Windows	In convenience center. See Fig. 7 .
Convenience Center	Behind right side of dash, below glove box. See Fig. 2 .
ECM Fuse	In left side electrical center. See Fig. 9 .
Fog Light Relay Fuse	In forward light electrical center. See Fig. 8 .
Forward Light Electrical Center	At right front corner of engine compartment. See Fig. 8 .
Fuse Block
1989	In glove box. See Fig. 1 .
1990 2.3L	In glove box. See Fig. 3 .
1990 3.1L (VIN T)	In glove box. See Fig. 4 .
1990 3.1L (VIN V)	In glove box. See Fig. 5 .
Fusible Elements
ABS Pump Motor (K)	In ABS power center. See Fig. 2 .
ABS Valve (L)	In ABS power center. See Fig. 2 .
Cooling Fans (E)	In right side electrical center. See Fig. 6 .
Defogger/HD Cooling Fan (G)	In right side electrical center. See Fig. 6 .
Ignition (J)	In right side electrical center. See Fig. 6 .
Ignition Power (F)	In right side electrical center. See Fig. 6 .
Ignition Switch/Power Accy. (H)	In right side electrical center. See Fig. 6 .
Fusible Links
ABS Power Center (2)	In left side electrical center. See Fig. 9 .
Charging System (2)	At starter solenoid.
Fuse Block	In left side electrical center. See Fig. 9 .
Right Side Electrical Center (2.8L & 3.1L) (1989)	In left side electrical center. See Fig. 1 .
Right Side Electrical Center (1989)	In left side electrical center. See Fig. 6 .
Right Side Electrical Center (1990)	In left side electrical center.
Left Side Electrical Center
1989 2.8L & 3.1L	In engine compartment, on left strut tower. See Fig. 1 .
Left Side Electrical Center	In engine compartment, on left strut tower. See Fig. 9 .
1990 2.3L	In engine compartment, on left strut tower. See Fig. 3 .
1990 3.1L (VIN T)	In engine compartment, on left strut tower. See Fig. 4 .
1990 3.1L (VIN V)	In engine compartment, on left strut tower. See Fig. 5 .
Right Side Electrical Center
1989 2.8L & 3.1L	In engine compartment, on right strut tower. See Fig. 1 .
Right Side Electrical Center	In engine compartment, on right strut tower. See Fig. 6 .
1990 2.3L	In engine compartment, on right strut tower. See Fig. 3 .
1990 3.1L (VIN T)	In engine compartment, on right strut tower. See Fig. 4 .
1990 3.1L (VIN V)	In engine compartment, on right strut tower. See Fig. 5 .

Buick Regal Custom 1990 - CONTROL UNITS

Buick Regal Custom 1990 CONTROL UNITS LOCATION

Component	Location
ABS Controller	Under passenger's seat.
Chime Module	In convenience center. See Fig. 7 .
Cruise Control Module	Behind instrument cluster, to left of brake pedal support.
Daytime Running Light (DRL) Module	Behind instrument panel, left of steering column.
Direct Ignition System (DIS) Module (1989)	Below exhaust manifold, on left side of engine. See Fig. 1 .
Direct Ignition System (DIS) Module (1990)	Below exhaust manifold, on left side of engine. See Fig. 4 .
Driver Information Center (DIC) Module	Behind right side of Instrument panel.
Electronic Control Module (ECM)
1989	In engine compartment, in front of right strut tower. See Fig. 1 .
1990 2.3L	In engine compartment, in front of right strut tower. See Fig. 3 .
1990 3.1L (VIN T)	In engine compartment, in front of right strut tower. See Fig. 4 .
1990 3.1L (VIN V)	In engine compartment, in front of right strut tower. See Fig. 5 .
Keyless Entry Module
1989	RH rear of luggage compartment, on rear window panel.
1990 Grand Prix	In right rear of luggage compartment.
1990 Except Grand Prix	In luggage compartment near right rear speaker.
Lumbar Seat Control Module	Under driver's seat.
Park/Turn Light Module	In forward light electrical center. See Fig. 8 .
Passive Restraint Control Module	Behind right side of dash, above convenience center.

Buick Regal Custom 1990 - SENDING UNITS & SENSORS

Buick Regal Custom 1990 SENDING UNITS & SENSORS LOCATION

Component	Location
Coolant Level/Corrosion Sensor
1989	On radiator, below radiator cap. See Fig. 1 .
1990 3.1L (VIN T)	On radiator, below radiator cap. See Fig. 4 .
1990 3.1L (VIN V)	On radiator, below radiator cap. See Fig. 5 .
Coolant Temperature Sensor
1989	On right side of engine, below coolant outlet. See Fig. 1 .
1990 2.3L	On right side of engine, below coolant outlet. See Fig. 3 .
1990 3.1L (VIN T)	In right side of engine, below coolant outlet. See Fig. 4 .
1990 3.1L (VIN V)	In right side of engine, below coolant outlet. See Fig. 5 .
Crankshaft Position Sensor (1989)	On right front of engine, below DIS.
Crankshaft Position Sensor (4-Cyl. 1990)	On lower front of engine, near oil filter.
Crankshaft Position Sensor (V6 1990)	On right front of engine, above oil filter.
Knock Sensor	Below exhaust manifold, at right rear of engine.
Manifold Absolute Pressure (MAP) Sensor
1989	On bracket, behind alternator. See Fig. 1 .
1990 2.3L	On bracket, behind alternator. See Fig. 3 .
1990 3.1L (VIN T)	On bracket, behind alternator. See Fig. 4 .
1990 3.1L (VIN V)	On bracket, behind alternator. See Fig. 5 .
Manifold Air Temp. (MAT) Sensor
1989	On air intake duct, near left strut tower. See Fig. 1 .
1990 2.3L	On air intake duct, near left strut tower. See Fig. 3 .
1990 3.1L (VIN T)	On air intake duct, near left strut tower. See Fig. 4 .
1990 3.1L (VIN V)	On air intake duct, near left strut tower. See Fig. 5 .
Oxygen Sensor
1989	In exhaust manifold, near rear of engine. See Fig. 1 .
1990 2.3L	In exhaust manifold, near rear of engine. See Fig. 3 .
1990 3.1L (VIN T)	In exhaust manifold, near rear of engine. See Fig. 4 .
1990 3.1L (VIN V)	In exhaust manifold, near rear of engine. See Fig. 5 .
Throttle Position Sensor (TPS)	On throttle body. See Fig. 1 .
Vehicle Speed Sensor (VSS)	On top right rear of transaxle. See Fig. 1 .

Buick Regal Custom 1990 - MOTORS

Buick Regal Custom 1990 MOTORS LOCATION

Component	Location
A/C Air Temp. Valve Motor	Below right side of dash, on A/C-heater housing.
A/C-Heater Blower Motor	Below right side of dash, on A/C-heater housing.
Lumbar Seat Pump/Motor	Below driver's seat.
Power Antenna Motor	In fender, behind right rear wheelwell.
Power Door Lock Motors	Near rear of each door.
Power Seat Motors	Below driver's seat.
Power Window Motors	In center of each door.
Windshield Washer Pump Motor	In windshield washer fluid reservoir.
Windshield Wiper Motor	In engine compartment, on left side of firewall.

Buick Regal Custom 1990 - SOLENOIDS & SOLENOID VALVES

Buick Regal Custom 1990 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
Air Select/Switching Valve	On right rear side of engine.
Canister Purge Solenoid
1989	On bracket, behind MAP sensor.
2.3L (1990)	On bracket, behind MAP sensor. See Fig. 3 .
3.1L (VIN T) (1990)	On bracket, behind MAP sensor. See Fig. 4 .
3.1L (VIN V) (1990)	On bracket, behind MAP sensor. See Fig. 5 .
Elect. Vacuum Regulator Valve (EVRV)	At rear of engine, at valve cover.
Idle Air Control (IAC) Valve
1989	On throttle body, at top rear of engine. See Fig. 1 .
2.3L (1990)	On throttle body, at top rear of engine. See Fig. 3 .
3.1L (VIN T) (1990)	On throttle body, at top rear of engine. See Fig. 4 .
3.1L (VIN V) (1990)	On throttle body, at top rear of engine. See Fig. 5 .
Seat Belt Retractor Solenoids	In bottom of each door.
Torque Converter Clutch (TCC) Solenoid	On transaxle valve body. See Fig. 1 .
Lugg. Comp. Release Solenoid	In center of lugg. comp. lid, above license plate.
Wastegate Solenoid (1990)	On left side of engine, on valve cover. See Fig. 5 .

Buick Regal Custom 1990 - SWITCHES

Buick Regal Custom 1990 SWITCHES LOCATION

Component	Location
High Pressure Switch	On high pressure line, between evaporator and accumulator.
A/C Intermediate Pressure Switch	On A/C accumulator.
A/C Low Pressure Switch
1989	On back of A/C compressor. See Fig. 1 .
1990 3.1L (VIN T)	On back of A/C compressor. See Fig. 4 .
1990 3.1L (VIN V)	On back of A/C compressor. See Fig. 5 .
A/C Pressure Fan Switch	On A/C pressure line, at condenser. See Fig. 1 .
Back-Up Light Switch	On top of transaxle.
Brake Fluid Level Switch	On master cylinder reservoir.
Coolant Temperature Switch
1989	On right side of engine, below coolant outlet. See Fig. 1 .
1990 2.3L	On right side of engine, below coolant outlet. See Fig. 3 .
Cruise/Brake Switch	On brake pedal support.
Door Latch Switch	In wiring harness, in middle rear of each door.
Oil Pressure Sensor/Switch
1989	On left front side of engine, near oil filter. See Fig. 1 .
1990 2.3L	On left front side of engine, near oil filter. See Fig. 3 .
1990 3.1L (VIN T)	On left front side of engine, near oil filter. See Fig. 4 .
1990 3.1L (VIN V)	On left front side of engine, near oil filter. See Fig. 5 .
Parking Brake Switch	On parking brake pedal support.
Park/Neutral Switch
1989	On top of transaxle, below brake master cylinder. See Fig. 1 .
1990 2.3L	On top of transaxle, below brake master cylinder. See Fig. 3 .
1990 3.1L (VIN T)	On top of transaxle, below brake master cylinder. See Fig. 4 .
1990 3.1L (VIN V)	On top of transaxle, below brake master cylinder. See Fig. 5 .
Power Steering Pressure Switch (PSPS)
Power Steering Pressure Switch (PSPS)	On steering gear assembly, near input shaft. See Fig. 1 .
1990 2.3L	On steering gear assembly, near input shaft. See Fig. 3 .
1990 3.1L (VIN T)	On steering gear assembly, near input shaft. See Fig. 4 .
1990 3.1L (VIN V)	On steering gear assembly, near input shaft. See Fig. 5 .
Seat Belt Switch	In driver's seat belt.

Buick Regal Custom 1990 - MISCELLANEOUS

Buick Regal Custom 1990 MISCELLANEOUS LOCATION

Component	Location
ABS Diode	Behind right hand side of instrument panel.
A/C Comp. Clutch Diode	In A/C compressor clutch connector.
A/C-Heater Blower Motor Resistors	Below right side of dash, on A/C-heater housing.
A/C-Heater System Solenoid Box	Below right side of dash, on A/C-heater housing.
ALDL Connector
1989	Below instrument cluster, to right of steering column. See Fig. 1 .
1990 2.3L	Below instrument cluster, to right of steering column. See Fig. 3 .
1990 3.1L (VIN T)	Below instrument cluster, to right of steering column. See Fig. 4 .
1990 3.1L (VIN V)	Below instrument cluster, to right of steering column. See Fig. 5 .
Cruise Control Servo	In engine compartment, on left strut tower.
Fuel Pump Prime/Test Connector	Taped to wiring harness, below left electrical center. See Fig. 1 .
Fuel Pump Prime/Test Connector
1990 2.3L	Taped to wiring harness, below left electrical center. See Fig. 3 .
1990 3.1L (VIN T)	Taped to wiring harness, below left electrical center. See Fig. 4 .
1990 3.1L (VIN V)	Taped to wiring harness, below left electrical center. See Fig. 5 .
Horn	Under left front fender.