Buick LeSabre 1990 - ELECTRICAL COMPONENT LOCATOR 1990 ELECTRICAL COMPONENT LOCATIONS General Motors Corp. - Electrical Components

Buick LeSabre 1990 - BUZZERS, RELAYS & TIMERS

Buick LeSabre 1990 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
ABS Main Relay	On left side of firewall, on relay bracket.
ABS Pump Relay	On left side of firewall, to left of ABS main relay.
A/C Compressor Relay	On right side of engine compartment, on relay bracket. See Fig. 1 .
A/C-Heater Blower Relay	On right center of firewall, on relay bracket.
A/C Select Relay	In fuse/relay block.
Antenna Relay	In right side of luggage compartment, behind wheel housing.
Cooling Fan Relays View	On left side of engine compartment, on relay bracket. See Fig. 1 .
Cooling Fan Relays Location	On left side of engine compartment, on relay bracket. See Fig. 2 .
Defogger Relay	In fuse/relay block.
Elect. Level Control Timer Relay	On right front of luggage compartment.
Fog Light Relay (Oldsmobile & Pontiac)	At position No. 5 of fuse/relay block.
Fuel Door Lock Relay	Behind right side of dash, left of relay center.
Fuel Pump Relay	On the relay center, behind glove box, 2nd column of relays, 2nd one from the top.
Hazard Flasher Relay	Under left side of dash, on right side of steering column brace.
Illuminated Entry Timer	Behind right side of dash, left of relay center.
Horn Relay	At position No. 2 of fuse/relay block.
Oil Light Relay	At position No. 1 of fuse/relay block.
Power Antenna Relay	In right side of trunk, attached to antenna mast.
Power Door Lock Relay Assembly	Behind right side of dash, left of relay center.
Power Seat Relay	Under seat, on right lower seat rail.
Seat Belt Retractor Release Solenoid Timer	Behind right side of dash, lower left of relay center.
Starter Interrupt Relay	Behind left side of dash, above accelerator pedal.
Sunroof Relay	On center of windshield header.
Theft Deterrent Relay	Under left side of dash, above theft deterrent controller.
Turn Signal Flasher Relay	Behind dash, on left side of steering column brace.

Buick LeSabre 1990 - CIRCUIT PROTECTION DEVICES

Buick LeSabre 1990 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Fuse Block	Behind trim plate, at left side of dash. See Fig. 1 .
Fuse/Relay Block	Behind left side of dash, to left of steering column.
Fusible Links
ABS Relays (Rust)	At positive junction block, at center of firewall.
Circuit Breakers (Rust)	At positive junction block, at center of firewall.
Cooling Fan(s) Relays (Rust)	At positive junction block, at center of firewall.
ECM (Rust)	At positive junction block, at center of firewall.
Fuse Block (Rust)	At positive junction block, at center of firewall.
Fuse/Relay Block (Rust)	At positive junction block, at center of firewall.
Headlight Switch (Rust)	At positive junction block, at center of firewall.
Ignition & Theft Deterrent (Rust)	At positive junction block, at center of firewall.
Power Door Lock Breaker	In right side of fuse block.
Power Luggage Compartment Lid Pull-Down Breaker	In right side of fuse block.
Power Seat Circuit Breaker	In right side of fuse block.
Power Window Circuit Breaker	In right side of fuse block.
Relay Center	Behind right side of dash. See Fig. 1 .

Buick LeSabre 1990 - CONTROL UNITS

Buick LeSabre 1990 CONTROL UNITS LOCATION

Component	Location
ABS Control Module	Under left side of dash, near kick panel.
A/C-Heater & Radio Control Interface Module	Inside steering column, near base.
A/C-Heater Blower Control Module	On right side of firewall, at center of plenum.
Alarm Module	Behind right side of dash, above glove box.
Automatic Door Lock Control Module	Behind far right side of instrument panel, behind convenience center.
Blower Control Module	On right side of engine compartment, in relay bracket.
Cruise Control Module	Behind left side of dash, left of steering column.
C(3)I Ignition Module
Bonneville, View of	At left front of engine, on valve cover. See Fig. 1 .
Bonneville, Location	At left front of engine, on valve cover. See Fig. 3 .
Delta 88 & Ninety-Eight	On top right front of engine.
Diag./Energy Reserve Module (DERM)	Under passenger seat.
Digital Cluster Decoder Module	Under right side of dash, behind digital display unit.
Elect. Climate Control Power Module	On right side of firewall, above blower motor.
Elect. Climate Control Programmer	Under right side of dash, near left side of glove box.
Electronic Compass Module	Below rear deck shelf.
Electronic Control Module (ECM)	Behind right side of dash. See Fig. 1 .
Headlight Washer Timer Module	Behind right side of dash, left of relay center.
Keyless Entry Module	Behind right side of dash, above glove box.
Lights Monitor Module	Behind right side of dash, near shroud.
Multi-Function Chime Module	Behind right side of dash, above glove box.
Power Seat Module	Under center console.
Power Window (Express Down) Module	In lower front of left front door.
PRNDL Decoder Module	Behind right side of dash, behind glove box.
Remote Dimmer Module	Behind left side of dash, at shroud.
SIR Energy Reserve Module	Under passenger seat.
SIR Driver's Inflator Module	In steering wheel hub.
SIR Passenger Compartment Sensor/Diagnostic Module	Under passenger seat.
Steering Wheel Pad Switch & Electronics Module	In steering wheel.
Sun Roof Control Module	At left roof rail, above front door.
Theft Deterrent Controller	Under left side of dash, above accelerator pedal.
Twilight Sentinel/Daytime Running Lights Module
Bonneville & LeSabre	Behind center of dash, to right of steering column.
Delta 88 & Ninety-Eight	Behind right of dash, above glove box.
Wiper Motor Module	On left rear of engine compartment, behind strut tower. See Fig. 2 .

Buick LeSabre 1990 - SENDING UNITS & SENSORS

Buick LeSabre 1990 SENDING UNITS & SENSORS LOCATION

Component	Location
ABS Speed Sensors	On each wheel assembly.
A/C Ambient Temperature Sensor	In front of car, on center radiator support.
A/C In-Car Temp. Sensor	In right side of dash, above glove box.
A/C Temperature Sensor
High Pressure Side	In A/C discharge line, near right shock tower.
Low Side Pressure Side	In A/C suction line, at right side of firewall.
Camshaft Position Sensor View	On lower left side of engine, near lower pulley. See Fig. 1 .
Camshaft Position Sensor Location	On lower left side of engine, near lower pulley. See Fig. 3 .
Coolant Temp. Sending Unit	At top left side of engine.
Coolant Temperature Sensor	On top left side of engine. See Fig. 1 .
Crankshaft Position Sensor View	On lower right side of engine, behind A/C compressor. See Fig. 1 .
Crankshaft Position Sensor Location	On lower right side of engine behind A/C compressor. See Fig. 3 .
Elect. Level Cntrl. (ELC) Height Sensor
Bonneville	On right rear of car, near strut tower.
Delta 88 & Ninety-Eight	On frame, above right rear suspension arm.
Knock Sensor	On lower right side of engine, behind lower pulley. See Fig. 1 .
Manifold Air Temp. (MAT) Sensor (View)	In air intake duct, on left side of engine compartment. See Fig. 1 .
Manifold Air Temp. (MAT) Sensor (Location)	In air intake duct, on left side of engine compartment. See Fig. 2 .
Manifold Absolute Pressure (MAP) Sensor	At center of firewall, above blower motor.
Mass Airflow (MAF) Sensor	In air intake duct, above TPS. See Fig. 1 .
Oil Press. Sending Unit/Switch	On lower right rear side of engine, below power steering unit. See Fig. 3 .
Oxygen (O2) Sensor	In exhaust manifold. See Fig. 1 .
SIR Forward Sensor	On bracket, below hood latch assembly.
Sunload Sensor	Under top left of dash.
Throttle Position Sensor (TPS)	On throttle body. See Fig. 1 .
Vehicle Speed Sensor (VSS)	On left side of transaxle. See Fig. 1 .

Buick LeSabre 1990 - MOTORS

Buick LeSabre 1990 MOTORS LOCATION

Component	Location
ABS Pump Motor	On bottom of master cylinder assembly.
A/C-Heater Blower Motor	Near center of firewall, in engine compartment.
Elect. Level Control Compressor	On left inner fender panel, behind headlights. See Fig. 2 .
Fuel Door Lock Motor	On left side of luggage compartment, above wheel housing.
Luggage Comp. Pull-Down Motor	Near latch, at center of luggage compartment.
Power Door Lock Motor	In rear of each door.
Power Seat Motors	Below front portion of front seats.
Power Seat Recliner Motor	In seat bottom frame.
Power Window Motors	In lower center of each door.
Seat Belt Retract Motor	In door, at rear brace.
Sun Roof Motor	In windshield header, above right seat.
Windshield Wiper Motor	At left rear corner of engine compartment.

Buick LeSabre 1990 - SOLENOIDS & SOLENOID VALVES

Buick LeSabre 1990 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
ABS Main Valve Solenoid	On bottom left side of master cylinder assembly.
Canister Purge Solenoid View	On vapor canister, at left front corner of engine compartment. See Fig. 1 .
Canister Purge Solenoid Location	On vapor canister, at left front corner of engine compartment. See Fig. 2 .
Idle Air Control (IAC) Valve	On rear of throttle body. See Fig. 1 .
Luggage Compartment Lid Release Solenoid	Under side of luggage compartment lid, near latch.
Power Seat Solenoid	Under each front seat.
Seat Belt Retract Solenoids	In each door, attached to retract motor.
Torque Converter Clutch (TCC) Solenoid	Inside transaxle, connector on left side of transaxle. See Fig. 2 .

Buick LeSabre 1990 - SWITCHES

Buick LeSabre 1990 SWITCHES LOCATION

Component	Location
A/C Cooling Fan Pressure Switch	On right rear of radiator.
A/C High Press. Cut-Out Switch	At rear of A/C compressor.
A/C Low Press. Switch	On A/C accumulator.
Brake Fluid Level Switch	On master cylinder fluid reservoir.
Brake Light Switch	On brake pedal support.
Brake Pressure Switch	In left side of master cylinder.
Cooling Fan Temp. Switch	On top right side of engine, near alternator.
Electronic Level Control (ELC) Compressor	On left front of engine compartment.
Luggage Comp. Lid Tamper Switch	At center of luggage compartment lid.
Parking Brake Switch	On top of parking brake assembly.
Power Steering Pressure Switch	On left rear of engine compartment, on steering rack.
Seat Belt Switch
Active Restraint	In left center pillar, at retractor solenoid.
Passive Restraint	In lower rear portion of left front door, at retractor solenoid.
SIR Arming Switch	Under passenger's seat.
Sun Roof Limit Switch	In roof, near top of right windshield pillar.
Transaxle Overdrive Switch	On left side of transaxle.
Transaxle Position Switch	On top left side of transaxle.
Washer Fluid Level Switch	In windshield washer reservoir.

Buick LeSabre 1990 - MISCELLANEOUS

Buick LeSabre 1990 MISCELLANEOUS LOCATION

Component	Location
ABS Diode	In ABS wiring harness, under left side of dash.
A/C Compressor Clutch Diode	On right side of engine, in engine wiring harness. See Fig. 3 .
ALDL Connector	Under dash, to right of steering column. See Fig. 1 .
Cooling Fan Resistor	On fan support frame, behind radiator.
Defogger Capacitor	Behind right side of rear seat, near quarter pillar.
ECM Resistor	Behind right side of dash, in engine wiring harness.
Elect. Level Control Diode	In instrument panel wiring harness, behind radio.
Elect. Level Cntrl. Test Connector	Near top of electronic level control compressor. See Fig. 2 .
Fog Light Switch Diode	Behind right side of dash, near windshield pillar.
Fuel Pump Prime/Test Connector	Taped to wiring harness, near battery. See Fig. 1 .
Keyless Entry Diode	Behind left side of dash, near theft deterrent relay.
Power Seat Diode	In connector at front of each seat.
Power Seat Recliner Capacitor	In connector at front of each seat.
Radio Amplifier	Under right front seat.
SIR Resistors	Behind center of dash, in composite harness.
Theft Deterrent Diode	Taped to dash wiring harness, next to theft deterrent controller.
Twilight Sentinel Photocell	On top left side of dash, above glove box.
Vehicle Speed Sensor (VSS) Buffer	Under right side of dash.