Buick Roadmaster Limited 1994 - ELECTRICAL COMPONENT LOCATOR 1994 ELEC COMPONENT LOCATION General Motors Corp. - Electrical Component Location

Buick Roadmaster Limited 1994 - BUZZERS, RELAYS & TIMERS

Buick Roadmaster Limited 1994 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
A/C Compressor Relay	On fuse/relay block, in engine compartment.
Blower Relays	Under right side of dash, near blower motor.
Cooling Fan Relays	On fuse/relay block, in engine compartment.
Dome/Courtesy Light Relay	On convenience relay.
Fuel Pump Relay	Next to fuse/relay block, in engine compartment.
Hazard Flasher Relay	On convenience center.
Horn Relay	On convenience center.
Luggage Comp. Release Relay	On convenience center.
Power Antenna Relay
Sedan	Attached to radio antenna, on rear fender.
Wagon	Left of convenience center. See Fig. 1 .
Power Door Lock Relay	Behind left kick panel.
Rear Defogger Relay	Behind right side of dash, near blower motor.
Rear Glass Release Relay (Wagon)	On convenience center.
Secondary AIR Pump Relay	On fuse/relay block, in engine compartment.
Tailgate Lock Relay	Behind left kick panel.
Theft Deterrent Relay	Behind left side of dash, left of brake pedal bracket, next to theft deterrent module. See Fig. 1 .
Turn Signal Flasher Relay	On convenience center.
Warning Alarm	On convenience center.

Buick Roadmaster Limited 1994 - CIRCUIT PROTECTION DEVICES

Buick Roadmaster Limited 1994 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Battery Junction Block	On right inner fender panel, near battery.
Circuit Breakers
Power Seats	In fuse block.
Power Windows	In fuse block.
Rear Defogger	In fuse block.
Convenience Center	Behind left side of dash, on bracket. See Fig. 1 .
Fuse Block
Engine Compartment View	Mounted on left side of dash. See Fig. 2 .
Behind Dash View	Mounted on left side of dash. See Fig. 1 .
Fuse/Relay Block	In engine compartment, on right inner fender panel. See Fig. 2 .
Fusible Links	Under fuse/relay block.
PCM/Fuel Pump In-Line Fuse	In right rear of engine compartment, on relay bracket.
Seat Lumbar In-Line Fuse	Under each front seat.

Buick Roadmaster Limited 1994 - CONTROL UNITS

Buick Roadmaster Limited 1994 CONTROL UNITS LOCATION

Component	Location
ABS System Module	Behind left side of dash, above convenience center.
A/C-Heater Module	Behind center of dash.
Air Bag System
Inflator Module	At center of steering wheel.
Resistor Module	Behind left side of dash, above parking brake pedal.
Audio Alarm Module	On convenience center.
Auto. Headlight Control Module	Behind right kick panel.
Blower Motor Control Module	Behind right side of dash, near blower motor.
Cruise Control Module	On left rear of inner fender panel, near master cylinder.
Daytime Running Lights (DRL) & Twilight Sentinel Module	Behind right kick panel.
Diagnostic Energy Reserve Module (DERM)	Behind left side of dash, above convenience center.
Electronic A/C Power Module	Behind right side of dash, near blower motor.
Keyless Entry Module	In luggage compartment, attached to rear shelf.
Low Coolant Warning Module	Behind right side of dash, below glove compartment.
Low Oil Warning Module	Behind right side of dash, below glove compartment.
Power Seat Pneumatic Control Module	Under passenger's side seat.
Power Steering Control Module	Behind left side of dash, near fuse block. See Fig. 1 .
Powertrain Control Module (PCM)	On left front of engine compartment, under air cleaner. See Fig. 2 .
Theft Deterrent Module	Behind left side of dash left of brake pedal bracket. See Fig. 1 .
Vehicle Speed Sensor Module	Behind left side of dash, on top of convenience center.

Buick Roadmaster Limited 1994 - SENDING UNITS & SENSORS

Buick Roadmaster Limited 1994 SENDING UNITS & SENSORS LOCATION

Component	Location
ABS Wheel Speed Sensors
Front	Mounted on each front wheel knuckle.
Rear	Mounted on rear axle differential.
A/C-Heater System
Inside Air Temp. Sensor	Behind right side of dash, above glove compartment.
Outside Air Temp. Sensor	Attached to hood latch support.
Sunload Sensor	On top center of dash, near defroster grille.
A/C Pressure Sensor	On high pressure line, above right inner fender panel. See Fig. 2 .
Air Bag System
Arming Sensor	Behind dash, to right of steering column.
Forward Discriminating Sensors	One on each side of radiator support assembly.
Automatic Level Control Sensor	On center of rear crossmember.
Eng. Coolant Temp. Sending Unit	On right side of engine, above stater motor. See Fig. 2 .
Eng. Coolant Temp. (ECT) Sensor	On front of engine, near thermostat housing. See Fig. 2 .
Intake Air Temp. (IAT) Sensor	In air cleaner assembly. See Fig. 2 .
Knock Sensors	On left and right side of engine. See Fig. 2 .
MAP Sensor	In front of engine, above water pump. See Fig. 2 .
Mass Airflow Sensor	In fresh air intake hose, near air cleaner. See Fig. 2 .
Oil Level Sensor	On left side of oil pan. See Fig. 2 .
Steering Wheel Rotation Sensor	At base of steering column, near floor.
Throttle Position (TP) Sensor	On throttle body assembly. See Fig. 2 .
Twilight Sentinel Photocell Sensor	On top of dash panel, on defrost grille.
Vehicle Speed Sensor (VSS)	On left transmission tail shaft. See Fig. 2 .

Buick Roadmaster Limited 1994 - MOTORS

Buick Roadmaster Limited 1994 MOTORS LOCATION

Component	Location
ABS Modulator	On left front of engine compartment.
A/C-Heater Blower Motor	Under right side of dash.
Automatic Level Control Pump	On left front frame rail.
Power Seat Motors	Under each front seat.
Secondary AIR Pump	On lower right front of engine. See Fig. 2 .
Window Washer Pump	In washer fluid reservoir.
Wiper Motor
Front	On right side of firewall.
Rear	On center of rear header.

Buick Roadmaster Limited 1994 - SOLENOIDS & SOLENOID VALVES

Buick Roadmaster Limited 1994 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
A/C-Heater Vacuum Elec. Solenoid	Behind right side of dash, below blower motor.
Brake/Transmission Shift Interlock (BTSI) Solenoid	On upper left side of steering column.
Canister Purge Solenoid	On top of engine, behind cylinder No. 4 injector. See Fig. 2 .
EGR Solenoid	On top of engine, behind cylinder No. 4 injector. See Fig. 2 .
Idle Air Control (IAC) Valve	On throttle body assembly. See Fig. 2 .
Luggage Compartment Release Solenoid	On top rear of luggage compartment lid.
Rear Glass Release Solenoid	On center of tailgate.
Torque Conv. Clutch (TCC) Solenoid	In transmission case.
Trunk Lid Release Solenoid	Mounted to trunk lid.

Buick Roadmaster Limited 1994 - SWITCHES

Buick Roadmaster Limited 1994 SWITCHES LOCATION

Component	Location
A/C Pressure Cycling Switch	Mounted on A/C accumulator. See Fig. 2 .
Backup Light/Trans. Position Switch	On base of steering column.
Brake Pressure Switch	Below master cylinder, on brake combination valve.
Brakelight/Cruise Release Switch	On brake pedal support bracket. See Fig. 2 .
Fuel Pump/Oil Pressure Switch	On top rear of engine. See Fig. 2 .
Park/Neutral Switch	Near steering column base.
Parking Brake Switch	Attached to top of parking brake assembly.
Power Steering Pressure Switch	Near power steering pump, in pressure line. See Fig. 2 .
Seat Belt Switch	Part of driver's seat belt assembly.
Stoplamp Switch	Behind left side of dash. See Fig. 1 .
Tailgate Ajar Switch	Inside lower right corner of tailgate assembly.
TCC/Cruise Release Switch	On brake pedal support bracket. See Fig. 1 .
TCC Temperature Switch	In transmission cooler pipe, near cooler.
Washer Fluid Level Switch	In windshield washer reservoir, on left front fender.

Buick Roadmaster Limited 1994 - MISCELLANEOUS

Buick Roadmaster Limited 1994 MISCELLANEOUS LOCATION

Component	Location
Blower Motor Resistor	Behind right side of dash, near blower motor.
Data Link Connector (DLC)	Under dash, to right of steering column. See Fig. 2 .
Diodes
A/C Compressor Clutch	Taped inside compressor clutch harness connector.
Circuit Isolation	On turn/hazard switch harness connector breakout branch.
Door Open Warning (SE Models)	Taped 1" from instrument cluster connector breakout branch.
DRL Dropping Diode	Attached to brake pedal bracket.
Interior Lights	Taped 1" from instrument cluster connector breakout branch.
Engine Oil Change Reset Switch	On left side of dash, next to fuse block.
Fuel Pump Test Connector	Near A/C accumulator.
Ignition Test Connector	On top right side of engine, near rocker cover. See Fig. 2 .
Remote Control Door Lock Receiver	Mounted under center of rear shelf.