BUZZERS, RELAYS & TIMERS
| Component | Location |
|---|---|
| ABS System Relay | On fuse/relay block No. 2, in engine compartment. |
| A/C Compressor Clutch Relay | On fuse/relay block No. 1 or on right front of engine compartment. (Scheme 3) |
| Blower Motor Relays | In component center, behind right side of dash. |
| Convertible Top Relays | Behind rear seatback. |
| Cooling Fan Relays | On fuse/relay block No. 1, in engine compartment. (Scheme 3) |
| Defogger Timer Relay | In component center, behind right side of dash. |
| Foglight Relay | On fuse/relay block No. 2, in engine compartment. |
| Fuel Pump Relay | On fuse/relay block No. 1, in engine compartment. (Scheme 3) |
| Hazard Flasher Relay | Behind left side of dash, above emergency brake. |
| Headlight Relay | Behind left side of dash, left of steering column. |
| Horn Relay | On fuse/relay block No. 2, in engine compartment. |
| Passive Restraint Timer Relay | Behind right side of dash. |
| Power Antenna Relay | On right rear wheelwell. |
| Power Door Lock Relay | Under driver's side sill plate, approximately 6 inches in front of hood release. |
| Theft Deterrent Relay | Under right side of dash. |
| Turn Signal Flasher Relay (Buick, Oldsmobile & Pontiac) | Mounted to right side top of steering column. |
| Turn Signal Flasher Relay (Chevrolet) | Behind left side of dash, above emergency brake. |
BUZZERS, RELAYS & TIMERS LOCATION
CIRCUIT PROTECTION DEVICES
| Component | Location |
|---|---|
| Circuit Breakers | In fuse block on end of dash (passenger side) or in underhood Fuse/Relay panel. |
| Component Center | Behind right side of dash, near blower motor. |
| Convertible Top In-Line Circuit Breaker (Cutlass Supreme) | Behind rear seatback, taped to wiring harness. |
| Fuse Block | On end of dash (passenger side). (Scheme 3) |
| Underhood Fuse/Relay Block | Forward of right front strut tower. (Scheme 3) |
| Fusible Links | At starter solenoid. |
CIRCUIT PROTECTION DEVICES LOCATION
CONTROL UNITS
| Component | Location |
|---|---|
| ABS System Control Module/Electronic Brake Control Module (EBCM) | Behind left side of dash, on pedal support bracket. |
| A/C-Heater Power Module | Behind right side of dash, under right side of plenum. |
| All Windows Automatic Down (AWAD) Module | Behind left side of dash. |
| Chime Module | In component center, under right side of dash. |
| Daytime Running Lights (DRL) Module | Behind left side of dash, on brake pedal support. |
| Diagnostic Energy Reserve Module (DERM) | Behind left side of dash. |
| Ignition Control Module | On top left of engine. (Scheme 3) |
| Light Driver Module | Behind left side of dash, right of steering column. |
| Low Oil Sensor Module | Behind left side of dash, on left side of brake pedal. |
| Passive Restraint Control Module | Behind right side of dash. |
| Powertrain Control Module (PCM) | On right side of engine compartment, forward of strut tower. (Scheme 3) |
| Radio Control Interface Module | Behind left side of dash, left of steering column. |
| Seat Control Module | Under left front seat. |
| Sun Roof Control Unit | On center of windshield header. |
CONTROL UNITS LOCATION
MOTORS
| Component | Location |
|---|---|
| ABS Actuator Motor | On left rear of engine compartment, under brake master cylinder. |
| A/C Air Temp. Valve Motor | Behind left side of dash. |
| A/C-Heater Blower Motor | Behind right side of dash, in plenum. |
| Pneumatic Seat Pump Motor | Under driver's seat. |
| Power Antenna Motor | In fender, behind right rear wheelwell. |
| Power Door Lock Motors | Near rear of each door. |
| Power Seat Motors | Under respective front seats. |
| Power Window Motors | In bottom center of each door. |
| Sun Roof Motor | On center of windshield header. |
| Windshield Washer Pump Motor | In windshield washer fluid reservoir. |
| Windshield Wiper Motor | On left side of firewall, in engine compartment. |
MOTORS LOCATION
SENDING UNITS & SENSORS
| Component | Location |
|---|---|
| ABS Wheel Speed Sensors | Behind each wheel hub. |
| A/C In-Vehicle Temp. Sensor | Behind right side of dash. |
| A/C Outside Temp. Sensor | On center of radiator support. |
| A/C Pressure Sensor | On left front of engine compartment, on A/C line. (Scheme 3) |
| Air Bag System Arming Sensor | On floor tunnel, between front seats. |
| Air Bag Forward Discriminating Sensor | On center radiator support. |
| Air Bag Passenger Compartment Discriminating Sensor | Behind left side of dash. |
| Camshaft Position Sensor | On left rear of engine, on cylinder head. |
| Crankshaft Position Sensor 3X (Low Resolution) | On engine block, behind alternator. (Scheme 3) |
| Crankshaft Position Sensor 24X (High Resolution) | At end of crankshaft, behind harmonic balancer. (Scheme 3) |
| DRL Light Sensor | On top of dash, near left front speaker. |
| Engine Coolant Temp. (ECT) Sensor | On rear of engine. (Scheme 3) |
| Intake Air Temp. (IAT) Sensor | In air cleaner canister. (Scheme 3) |
| Knock Sensor | On right side of engine. (Scheme 3) |
| Low Oil Level Sensor | In engine oil pan. |
| Mass Airflow (MAF) Sensor | On air intake, on rear of engine. (Scheme 3) |
| Throttle Position (TP) Sensor | On throttle body assembly. (Scheme 3) |
| Vehicle Speed Sensor (VSS) | On right front of engine. (Scheme 3) |
SENDING UNITS & SENSORS LOCATION
SOLENOIDS & SOLENOID VALVES
| Component | Location |
|---|---|
| ABS Solenoids | On left rear of engine compartment, under brake master cylinder. |
| Canister Purge Solenoid | On top right of engine, on intake plenum. (Scheme 3) |
| Idle Air Control (IAC) Valve | On throttle body assembly. (Scheme 3) |
| Lap Belt Solenoids | In rear of each front door. |
| Seat Belt Retractor Solenoids | In bottom of each door. |
| Shoulder Belt Solenoids | In rear of each front door. |
| Torque Converter Clutch (TCC) Solenoid | In transaxle valve body. |
| Trunk Release Solenoid | In center of trunk lid, above license plate. |
SOLENOIDS & SOLENOID VALVES LOCATION
SWITCHES
| Component | Location |
|---|---|
| Back-Up Light Switch | On top of transaxle. |
| Brake/Cruise/TCC Switch | On brake pedal support. |
| Brake Fluid Level Switch | In master cylinder. |
| Clutch/Cruise Switch | On clutch pedal support. |
| Fuel Pump/Oil Pressure Switch | Near oil filter. (Scheme 3) |
| Park/Neutral (P/N) Switch | In lower left side of engine compartment, on transaxle. (Scheme 3) |
| Parking Brake Switch | Under left side of dash, on top of brake pedal support. |
| Power Steering Pressure Switch | On left rear of engine compartment, on power steering line. (Scheme 3) |
| Seat Belt Switch | In driver's seat belt assembly. |
SWITCHES LOCATION
MISCELLANEOUS
| Component | Location |
|---|---|
| A/C Compressor Clutch Diode | About 17 cm from A/C compressor clutch. |
| Blower Motor Resistors | Behind right side of dash, in plenum. |
| Data Link Connector (DLC) | Below left side of dash, right of steering column. (Scheme 3) |
| DRL Diode | Behind left side of dash, on brake pedal support. |
| Fuel Pump Prime/Test Connector | Taped to wiring harness, below No. 2 fuse/relay block. (Scheme 3) |
| Keyless Entry Receiver | On right side of rear shelf. |
| Radio Amplifier | Behind left side of dash, right of steering column. |
MISCELLANEOUS LOCATION
CONNECTORS
| Component | Location |
|---|---|
| C100 (Black, 36 Pin) | Right side of dash, behind strut tower. |
| C102 (Black, 10 Pin) | Right front of engine compartment, near right strut tower. |
| C104 (Black, 10 Pin) | Right front of engine compartment, near right strut tower. |
| C111 (2 Pin) | Left side of radiator support. |
| C112 (2 Pin) | Right side of radiator support. |
| C120 (4 Pin) | Right side of radiator support. |
| C130 (2 Pin) | Lower right front of engine compartment. |
| C134 (2 Pin) | Front left side of engine compartment, behind headlamp. |
| C200 (Gray, 102 Pin) | Behind right side of dash, near shroud. |
| C202 (Black, 48 Pin) | Behind dash, right side of steering column. |
| C213 (4 Pin) | Behind dash, right side of brake pedal support. |
| C219 (Black, 23 Pin) | Behind dash, right side of brake pedal support. |
| C240 (4 Pin) | Behind center of dash, left of radio. |
| C301 (Black, 23 Pin) | Left "A" pillar. |
| C302 (23 Pin) | Right "A" pillar. |
| C313 (2 Pin) | Under left front seat. |
| C314 (2 Pin) | Under right front seat. |
| C330 (2 Pin) | Under left front seat. |
| C353 (4 Pin) | Left "B" pillar. |
| C354 (4 Pin) | Right "B" pillar. |
| C355 (8 Pin) | Left "B" pillar. |
| C356 (8 Pin) | Right "B" pillar. |
| C401 (2 Pin) | Right side of rear compartment. |
| C402 (2 Pin) | Center of rear compartment. |
| C405 (6 Pin) | Center rear of vehicle, near fuel tank. |
| C420 (2 Pin) | Right side of rear compartment, at wheelhouse. |
| C430 (4 Pin) | Center rear of rear compartment lid. |
CONNECTORS LOCATION
GROUNDS
| Component | Location |
|---|---|
| G101 | Left side of radiator support. |
| G102 | Right side of radiator support. |
| G111 | Lower left front of engine, on transaxle stud. |
| G113 | Lower left front of engine, on transaxle stud. |
| G115 | Lower left front of engine, on transaxle stud. |
| G117 | Lower left front of engine, on transaxle stud. |
| G119 | Left front frame rail. |
| G201 | Behind dash, on right side of brake pedal bracket. |
| G203 | Behind dash on right side of brake pedal bracket. |
| G205 | Behind dash on left side of brake pedal bracket. |
| G251 | Behind dash on right side of brake pedal bracket. |
| G301 | At base of left "B" pillar. |
| G302 | At base of right "B" pillar. |
| G304 | At base of right "B" pillar. |
| G311 | At base of left "B" pillar. |
| G312 | At base of right "B" pillar. |
| G349 | Center of windshield header. |
GROUNDS LOCATION
SPLICES
| Component | Location |
|---|---|
| S102 | Engine harness, 7 cm from engine coolant level indicator module. |
| S105 | Engine harness, 23 cm from engine cooling fan No. 1. |
| S106 | Engine harness, 19 cm from PCM. |
| S109 | Engine jumper harness, 42 cm from C102. |
| S123 | Forward lamp harness, 8 cm from right headlamp. |
| S124 | Forward lamp harness, 8 cm from left headlamp. |
| S125 | Wiper harness, 7 cm from Heater-A/C vacuum line. |
| S128 | Engine harness, 16 cm from PCM. |
| S129 | Engine harness, 14 cm from U/H electrical center. |
| S130 | Engine harness, 22 cm from U/H electrical center No. 1 |
| S132 | Wiper harness, 10 cm from G119. |
| S134 | Wiper harness, 20 cm from anti lock brakes system solenoids. |
| S135 | Wiper harness, 20 cm from ABS solenoids. |
| S141 | Engine harness, 4 cm from EVAP. |
| S142 | Engine harness, 4 cm from powertrain control module. |
| S148 | Right park lamp jumper harness, 10 cm from C112. |
| S149 | Left park lamp jumper harness, 10 cm from C111. |
| S150 | Forward lamp jumper harness, 7 cm from right center park lamp. |
| S156 | Engine harness, 8 cm from powertrain control module. |
| S157 | Engine harness, 12 cm from U/H electrical center No. 1. |
| S158 | Engine harness, 4 cm from powertrain control module. |
| S162 | Second air injection pump, 35 cm from C134. |
| S201 | I/P harness, 4 cm from fuse block. |
| S202 | I/P harness, 12 cm from C202. |
| S206 | I/P harness, 12 cm form theft deterrent module. |
| S209 | I/P harness, 4 cm from radio. |
| S211 (Chevrolet) | I/P harness, 12 cm from C202. |
| S211 (Oldsmobile) | I/P harness, 4 cm from radio. |
| S211 (Pontiac) | I/P harness, 4 cm from the instrument cluster. |
| S213 (Chevrolet) | I/P harness, 8 cm from theft deterrent module. |
| S213 (Oldsmobile/Pontiac) | I/P harness, 4 cm from radio. |
| S213 | I/P harness, 5 cm from radio. |
| S230 | I/P harness, 4 cm from radio. |
| S233 | I/P harness, at theft deterrent module. |
| S234 | I/P harness, 8 cm from dash compartment lamp. |
| S239 | I/P harness, 9 cm from radio. |
| S240 | I/P harness, 13 cm from chime module. |
| S243 (Chevrolet) | I/P harness, 6 cm from C100. |
| S243 (Oldsmobile/Pontiac) | I/P harness, 10 cm from vacuum/electric solenoid. |
| S247 | I/P harness, 3 cm from dash compartment lamp. |
| S270 | SIR wiring harness, 10 cm from DERM. |
| S303 | Cross-car harness, 72 cm from G301. |
| S305 | Cross-car harness, 33 cm from G301. |
| S306 | Cross-car harness, 23 cm from C330. |
| S308 | Cross-car harness, 22 cm from door lock relay. |
| S312 | Cross-car harness, 52 cm from C330. |
| S318 | Cross-car harness, 7 cm from C330. |
| S326 | Body harness, 5 cm from C330. |
| S327 | Body harness, 5 cm from G311. |
| S375 | Console harness, 5 cm from console lighter. |
| S390 (W/Sun Roof) | Roof harness, 4 cm from courtesy lamp. |
| S390 (W/O Sun Roof) | Roof harness, 17 cm from dome lamp. |
| S391 | Roof harness, 4 cm from rear view mirror. |
| S395 | Roof harness, 12 cm from courtesy lamp. |
| S402 (Chevrolet) | Right rear body harness, 7 cm from license plate lamp. |
| S402 (Oldsmobile 2 Door) | Right rear body harness, 37 cm from right license plate lamp. |
| S402 (Oldsmobile 4 Door) | Right rear body harness, 20 cm from P400. |
| S402 (Pontiac) | Right rear body harness, 4 cm from right back-up lamp. |
| S403 | Right rear body harness, 5 cm from back up lamp. |
| S406 (Oldsmobile/Pontiac) | Cross-car harness, 9 cm from rear radio speaker. |
| S406 (Chevrolet) | Cross-car harness, 17 cm from center high mounted stop lamp. |
| S412 | Right rear body harness, 5 cm from left back-up lamp. |
| S415 | Back-up lamp harness, 4 cm from right back-up lamp. |
| S501 (Oldsmobile) | Left front door, 6 cm from door lock switch. |
| S501 (Pontiac) | Left front door, 4 cm from window switch. |
| S504 (Chevrolet) | Left front door, 7 cm from window switch. |
| S504 (Oldsmobile 2 Door) | Left front door, 12 cm from window switch. |
| S504 (Oldsmobile 4 Door) | Left front door, 4 cm from window motor. |
| S504 (Pontiac) | Left front door, 5 cm from window switch. |
| S601 | Right front door, 4 cm from window switch. |
| S604 (Chevrolet) | Left front door, 6 cm from radio speaker. |
| S604 (Oldsmobile 2 Door) | Left front door, 12 cm from door lock switch. |
| S604 (Oldsmobile 4 Door) | Left front door, 4 cm from window motor. |
| S604 (Pontiac) | Left front door, 5 cm from window switch. |
SPLICES LOCATION
COMPONENT LOCATION GRAPHICS
Note. Figures may show multiple component locations. Refer to appropriate table for proper figure references.
