Buick Roadmaster Estate Wagon 1995 - ELECTRICAL COMPONENT LOCATOR 1995 ELECTRICAL COMPONENT LOCATION General Motors Corp. - Electrical Component Location

Buick Roadmaster Estate Wagon 1995 - BUZZERS, RELAYS & TIMERS

Buick Roadmaster Estate Wagon 1995 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 center. See Fig. 2.
Fuel Pump Relay	On to fuse/relay block, in engine compartment.
Hazard Flasher	On convenience center. See Fig. 2.
Horn Relay	On convenience center. See Fig. 2.
Luggage Compartment Release Relay	On convenience center. See Fig. 2.
Power Antenna Relay	On convenience center. See Fig. 2.
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. See Fig. 2.
Secondary AIR Pump Relay	On fuse/relay block, in engine compartment.
Tailgate Lock Relay	Behind left kick panel.
Theft Deterrent Relay	Behind right kick panel.
Turn Signal Flasher	On convenience center. See Fig. 2.
Warning Alarm	On convenience center. See Fig. 2.

Buick Roadmaster Estate Wagon 1995 - CIRCUIT PROTECTION DEVICES

Buick Roadmaster Estate Wagon 1995 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Battery Junction Block	On right inner fender panel, near battery.
Circuit Breaker (Power Seats)	In fuse block.
Circuit Breaker (Power Windows)	In fuse block.
Circuit Breaker (Rear Defogger)	In fuse block.
Convenience Center	Behind left side of dash, on bracket.
I/P Fuse Block	Mounted on left side of dash. See Fig. 1.
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.
Underhood Electrical Center	In engine compartment, on right inner fender panel. See Fig. 1.

Buick Roadmaster Estate Wagon 1995 - CONTROL UNITS

Buick Roadmaster Estate Wagon 1995 CONTROL UNITS LOCATION

Component	Location
ABS System Module	In left side of engine compartment, on brake pressure modulator valve.
A/C-Heater Module	Behind center of dash.
Air Bag System (Left Inflator Module)	At center of steering wheel.
Air Bag System (Right Inflator Module)	Behind right side of dash, above glove compartment.
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 front 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.
Power Steering Control Module	Behind left side of dash, near fuse block.
Powertrain Control Module (PCM)	On left front of engine compartment, under air cleaner. See Fig. 1.

Buick Roadmaster Estate Wagon 1995 - MOTORS

Buick Roadmaster Estate Wagon 1995 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 Injection (AIR) Pump	On lower left front of engine. See Fig. 1.
Window Washer Pump	In washer fluid reservoir.
Wiper Motor (Front)	On right side of firewall.
Wiper Motor (Rear)	On center of rear header.

Buick Roadmaster Estate Wagon 1995 - SENDING UNITS & SENSORS

Buick Roadmaster Estate Wagon 1995 SENDING UNITS & SENSORS LOCATION

Component	Location
ABS Wheel Speed Sensor (Front)	Mounted on each front wheel knuckle.
ABS Wheel Speed Sensor (Rear)	Mounted on rear axle differential.
A/C-Heater System Inside Air Temperature Sensor	Behind right side of dash, above glove compartment.
A/C-Heater System Outside Air Temperature Sensor	Attached to hood latch support.
A/C-Heater System Sunload Sensor	On top center of dash, near defroster grille.
A/C Refrigerant Pressure Sensor	On high pressure line, above right inner fender panel. See Fig. 1.
Air Bag System Arming Sensor	Behind dash, to right of steering column.
Air Bag System Forward Discriminating Sensors	Center of radiator support assembly, near hood latch.
Automatic Level Control Sensor	On center of rear crossmember.
Engine Coolant Temperature (ECT) Sensor	On front of engine, near thermostat housing. See Fig. 1.
Engine Coolant Temperature Gauge Sensor	Lower right side of engine block, below manifold. See Fig. 3.
Engine Oil Level Sensor	At left rear of engine. See Fig. 1.
Heated Oxygen Sensor (HO2S)	On left and right side of engine. See Fig. 1.
Intake Air Temperature (IAT) Sensor	In air cleaner assembly. See Fig. 1.
Knock Sensor	On left and right side of engine. See Fig. 3.
Low Coolant Level Sensor	In coolant expansion tank.
Manifold Absolute Pressure (MAP) Sensor	In front of engine, above water pump. See Fig. 1.
Mass Airflow (MAF) Sensor	In fresh air intake hose, near air cleaner. See Fig. 1.
Oil Level Sensor	On left side of oil pan.
Throttle Position (TP) Sensor	On throttle body assembly. See Fig. 1.
Twilight Sentinel Photocell Sensor	On top of dash panel, on defrost grille.
Vehicle Speed Sensor (VSS)	On left transmission tail shaft. See Fig. 1.

Buick Roadmaster Estate Wagon 1995 - SOLENOIDS & SOLENOID VALVES

Buick Roadmaster Estate Wagon 1995 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
A/C-Heater Vacuum Elect. Solenoid	Behind right side of dash, below blower motor.
Brake/Transmission Shift Interlock (BTSI) Solenoid	On upper left side of steering column.
EGR Vacuum Control Signal Solenoid Valve	On top of engine, behind cylinder No. 7 injector. See Fig. 1.
EVAP Canister Purge Solenoid Valve	On top of engine, behind cylinder No. 4 injector. See Fig. 1.
Idle Air Control (IAC) Valve	On throttle body assembly. See Fig. 1.
Luggage Compartment Release Solenoid	Under top rear of luggage compartment lid.
Rear Glass Release Solenoid	On center of tailgate.
Trunk Lid Release Solenoid	Mounted to trunk lid.

Buick Roadmaster Estate Wagon 1995 - SWITCHES

Buick Roadmaster Estate Wagon 1995 SWITCHES LOCATION

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

Buick Roadmaster Estate Wagon 1995 - MISCELLANEOUS

Buick Roadmaster Estate Wagon 1995 MISCELLANEOUS LOCATION

Component	Location
Blower Motor Resistor	Behind right side of dash, near blower motor.
Crankcase Ventilation Valve	At left side of engine. See Fig. 1.
Data Link Connector (DLC)	Under dash, to right of steering column. See Fig. 1.
Diode (A/C Compressor Clutch)	Taped inside compressor clutch harness connector.
Diode (Circuit Isolation)	On turn/hazard switch harness connector breakout branch.
Diode (Door Open Warning - SE Models)	Taped 1" from instrument cluster connector breakout branch.
Diode (DRL Dropping Diode)	Attached to brake pedal bracket.
Interior Lights	Taped 1" from instrument cluster connector breakout branch.
Fuel Injectors	At intake manifold. See Fig. 1.
Fuel Pump Test Connector	Near A/C accumulator.
Ignition Test Connector	On top right side of engine, near rocker cover. See Fig. 1.
Malfunction Indicator Light (MIL)	At left side of dash. See Fig. 1.
PCM Ground	At left front side of engine. See Fig. 1.
Primary Cooling Fan	At right front side of engine compartment. See Fig. 1.
Remote Control Door Lock Receiver	Mounted under center of rear shelf.
Secondary Cooling Fan	At left front side of engine compartment. See Fig. 1.
SIR System Components	At front & rear of engine compartment, & left side of dash. See Fig. 1.
Transmission Electrical Connector	At right rear side of engine. See Fig. 1.

Buick Roadmaster Estate Wagon 1995 - CONNECTORS

Buick Roadmaster Estate Wagon 1995 CONNECTORS LOCATION

Component	Location
C100 (Black, 10 Pin)	Forward of windshield washer solvent container.
C101 (Gray, 4 Pin)	Behind left front park/turn light.
C103 (5 Pin)	Near underhood electrical center.
C104 (4 Pin)	Near battery.
C200 (Black, 56 Pin)	Above accelerator pedal.
C201 (Black, 6 Pin)	At right side of steering column.
C202 (6 Pin)	At right side of steering column.
C203 (Natural, 10 Pin)	At right side of steering column.
C204 (Black, 37 Pin)	Behind right side of dash.
C205 (Natural, 10 Pin)	At right side of dash compartment.
C206 (4 Pin)	Above accelerator pedal.
C207 (6 Pin)	Body harness to engine harness, near C204.
C207A (3 Pin)	Near base of right "A" pillar.
C207B (3 Pin)	Near base of right "A" pillar.
C210 (Black, 11 Pin)	Under steering column.
C218 (4 Pin)	Above accelerator pedal.
C220 (Natural, 10 Pin)	At right side of steering column.
C300 (Black, 6 Pin)	Under driver's seat.
C301 (Black, 6 Pin)	Under passenger's seat.
C302 (Black, 10 Pin)	At base of left "A" pillar.
C303 (Black, 6 Pin)	At base of left "A" pillar.
C308 (Gray, 6 Pin)	At upper left side of rear compartment.
C309 (6 Pin)	At base of left "A" pillar.
C315 (Blue, 10 Pin)	At base of left "A" pillar.
C316 (Black, 23 Pin)	Under driver's seat.
C317 (Black, 23 Pin)	Under passenger's seat.
C318 (6 Pin)	Under driver's seat.
C319 (6 Pin)	Under driver's seat.
C320 (3 Pin)	Under driver's seat.
C321 (2 Pin)	Under driver's seat.
C322 (2 Pin)	Under driver's seat.
C324 (2 Pin)	Under driver's seat.
C325 (4 Pin)	Under driver's seat.
C326 (2 Pin)	Under driver's seat.
C327 (23 Pin)	Cross-car to passenger power seat jumper.
C328 (2 Pin)	Under passenger's seat.
C329 (2 Pin)	Under passenger's seat.
C330 (3 Pin)	Under passenger's seat.
C331 (2 Pin)	Under passenger's seat.
C332 (4 Pin)	Under passenger's seat.
C334 (2 Pin)	Under driver's seat.
C335 (2 Pin)	Under passenger's seat.
C350 (6 Pin)	Near center of left "D" pillar.
C351 (6 Pin)	At left rear wheelwell.
C400 (Sedan) (Black, 8 Pin)	At left rear fender.
C400 (Wagon) (Black, 6 Pin)	Forward of left taillights.
C402 (1 Pin)	Near fuel pump/level sender.
C403 (2 Pin)	At center of tailgate.
C405 (Green, 6 Pin)	Near center of left "D" pillar.
C406 (Black, 6 Pin)	Forward of taillights.
C500 (Black, 8 Pin)	Inside left front door.
C600 (Black, 8 Pin)	Inside right front door.

Buick Roadmaster Estate Wagon 1995 - GROUNDS

Buick Roadmaster Estate Wagon 1995 GROUNDS LOCATION

Component	Location
G100	In engine compartment, at front of right cylinder head.
G101	At right front fender, near battery.
G102	Behind left headlight support.
G104	In engine compartment, at front of left cylinder head.
G106	At right headlight support.
G200	At base of left "A" pillar.
G201	At base of left "A" pillar.
G202	At base of right "A" pillar.
G300 (Sedan)	In trunk, at left rear wheelwell.
G300 (Wagon)	Near center of left "D" pillar.
G400	Near center of right "D" pillar.

Buick Roadmaster Estate Wagon 1995 - SPLICES

Buick Roadmaster Estate Wagon 1995 SPLICES LOCATION

Component	Location
S100	In forward lamp harness, near breakout for right park/turn light.
S101	In forward lamp harness, near breakout for left headlight.
S102	In engine harness, near breakout for right fuel injectors.
S103	In engine harness, near breakout for transmission controller.
S104	In forward lamp harness, near breakout for C100.
S105	In forward lamp harness, near breakout for C100.
S106	In forward lamp harness, near breakout for C100.
S107	In forward lamp harness, near breakout for C100.
S109	In engine harness, near breakout for transmission.
S110	In engine harness, near breakout for brake pressure modulator valve.
S111	In engine harness, near breakout for underhood electrical center.
S112	In engine harness, near breakout for underhood electrical center.
S113	In engine harness, near breakout for fuel injector No. 6.
S114	In engine harness, near breakout for transmission controller.
S115	In engine harness, near breakout for transmission.
S116	In forward lamp harness, near breakout for ignition coil.
S117	In engine harness, near breakout for fuel injector No. 6.
S118	In engine harness, near breakout for transmission controller.
S119	In engine harness, near breakout for G104.
S120	In engine harness, near breakout for fuel injector No. 8.
S121	In engine harness, near breakout for transmission controller.
S122	In engine harness, near breakout for ignition coil.
S132	In engine harness, near breakout for underhood electrical center.
S138	In forward lamp harness, near breakout for left horn.
S140	In forward lamp harness, near breakout for left horn.
S141	In forward lamp harness, near breakout for C103.
S200 (Buick)	In dash harness, near breakout for instrument cluster.
S200 (Chevrolet)	In dash harness, near breakout for heater & A/C control.
S201 (Buick)	In dash harness, near breakout for instrument cluster.
S201 (Chevrolet)	In dash harness, near breakout for C200.
S202	In daytime running light harness, near breakout for ambient light sensor.
S207	In daytime running light harness, near breakout for ambient light sensor.
S211	In dash harness, near breakout for electric actuator.
S212	In engine harness, near breakout for underhood electrical center.
S213	In dash harness, near breakout for heater & A/C control.
S215	In body harness, near breakout for SDM.
S220	In daytime running light harness, near breakout for ambient light sensor.
S221	In dash harness, near breakout for C200.
S223	In dash harness, near breakout for C200.
S224	In dash harness, near breakout for C200.
S226	In body harness, near breakout for convenience center.
S227	In body harness, near breakout for SDM.
S228	In dash harness, near breakout for instrument cluster.
S230	In body harness, near breakout for BTSI solenoid.
S231	In body harness, near breakout for convenience center.
S232	In body harness, near breakout for SDM.
S233	In dash harness, near breakout for instrument cluster.
S234	In body harness, near breakout for C201.
S236	In body harness, near breakout at left front wheelwell.
S237	In body harness, near breakout at left front wheelwell.
S239	In daytime running lights harness, near breakout for ambient light sensor.
S241	In body harness, near breakout for SDM.
S242	In body harness, near breakout for C302.
S245	In body harness, near breakout for dash fuse block.
S247	In body harness, near breakout for theft deterrent relay.
S250	In body harness, near breakout for convenience center.
S251	In body harness, near breakout for SDM.
S252	In body harness, near breakout for SDM.
S253	In body harness, near breakout for convenience center.
S254	In dash harness, behind instrument cluster.
S255	In dash harness, behind instrument cluster.
S256	In body harness, near breakout for convenience center.
S257	In body harness, near breakout for convenience center.
S260	In body harness, near breakout for convenience center.
S265	In body harness, near breakout for SDM.
S266	In body harness, near breakout for rear window defogger relay.
S267	In body harness, near breakout for rear window defogger relay.
S269	In body harness, near breakout for SDM.
S270	In body harness, near breakout for SDM.
S271	In body harness, near breakout for SDM.
S275	In body harness, near breakout for C200.
S276	In body harness, near breakout for SDM.
S277	In body harness, near breakout for SDM.
S278	In body harness, near breakout for convenience center.
S279	In body harness, near breakout for convenience center.
S280	In body harness, near breakout for BTSI solenoid.
S281	In body harness, near breakout for convenience center.
S282	In body harness, near channel opening at left "B" pillar.
S300	In cross-car harness, near breakout for G201.
S303	In cross-car harness, near breakout for G302.
S306	In cross-car harness, near breakout for power seat.
S307	In body harness, near breakout for C309.
S308	In body harness, near breakout for C309.
S309	In deck lid harness, near breakout for rear license light.
S310	In body harness, near breakout for C309.
S311	In body harness, at breakout for C309.
S312	In cross-car harness, near breakout for C309.
S313	In body harness, near breakout for G300.
S314 (Sedan)	In body harness, near breakout for G300.
S316	In roof harness, near breakout for C309.
S325	In cross-car harness, near breakout for power seat.
S328	In cross-car harness, near breakout for power seat.
S330	In cross-car harness, near breakout for door lock relay.
S331	In cross-car harness, near breakout for C303.
S332	In cross-car harness, near breakout for C303.
S333	In cross-car harness, at breakout for C303.
S335	In cross-car harness, at breakout for C303.
S338	In cross-car harness, at breakout between right front door & "A" pillar.
S339	In cross-car harness, near breakout for power seat.
S341	In cross-car harness, near breakout for power seat.
S342	In cross-car harness, near breakout for power seat.
S343	In cross-car harness, near breakout for power seat.
S344	In driver's seat harness, near breakout for seat control switch.
S345	In driver's seat harness, near breakout for seat control switch.
S346	In driver's seat harness, near breakout for driver seat switch.
S348	In passenger's seat harness, near breakout for C301.
S349	In passenger's seat harness, near breakout for C301.
S350	In passenger's seat harness, near breakout for C301.
S349	In passenger's seat harness, near breakout for C301.
S400 (Sedan)	In rear light harness, near breakout for left back-up light.
S400 (Wagon)	In left rear light harness, near breakout for left lower tail/turn/stoplight.
S401 (Sedan)	In rear light harness, near breakout for taillight.
S401 (Wagon)	In right rear light harness, near breakout for right lower tail/turn/stoplight.
S402	In tailgate harness, near breakout for center high mount stoplight.
S403	In rear light harness, near breakout for C405.
S404	In body rear harness, near breakout for C400.
S406	In rear header harness, near breakout for rear window defogger ground.
S407	In tailgate harness, near breakout for C405.
S408	In deck lid harness, near breakout for rear license light.
S409	In license light harness, near breakout for C400.
S410	In rear light harness, near breakout for C400.
S411	In rear light harness, near breakout for C400.
S413	In body rear harness, near breakout for G300.
S414	In body rear harness, near breakout for G300.
S415	In rear body harness, near breakout for C350.
S416	In rear body harness, near breakout for rear defogger grid connector.
S417	In body harness, near breakout for G300.
S418	In body harness, near breakout for high mount stoplight.
S420	In body harness, near breakout for C400.
S501	In cross-body harness, inside left front door.
S503	In cross-body harness, inside left front door.
S505	In cross-body harness, inside left front door.