GMC Safari 1990 - ELECTRICAL COMPONENT LOCATOR 1989-90 ELECTRICAL COMPONENT LOCATIONS General Motors Corp. - Electrical Components - Trucks

GMC Safari 1990 - BUZZERS, RELAYS & TIMERS

GMC Safari 1990 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
A/C Clutch Control Relay
Component View	On bracket, at right side of engine compartment. See Fig. 1 .
2.5L Component Location	On bracket, at right side of engine compartment. See Fig. 2 .
A/C-Heater High Blower Relay	On bracket, at right side of engine compartment. See Fig. 1 .
Fog Lamp Relay	On convenience center.
Fuel Pump Relay
Component View	On bracket, at right side of engine compartment. See Fig. 1 .
2.5L Engine	On bracket, at right side of engine compartment. See Fig. 2 .
4.3L Engine	On bracket, at right side of engine compartment. See Fig. 3 .
Hazard Flasher Relay	On convenience center.
Horn Relay	On convenience center.
Power Door Lock Delay Relay	On harness, to left of fuse block.
Power Door Lock Relay	Behind right kick panel.
Shift Indicator Lamp Relay	On bracket, behind right side of dash.
Turn Signal Flasher Relay	On bracket, at right side of steering column.

GMC Safari 1990 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Battery Junction Block	On fender panel, next to battery.
Circuit Breakers
Auxiliary A/C	In convenience center.
Auxiliary Heater	In convenience center.
Fog Light Relay	In convenience center.
Power Accessories	In fuse block.
Power Seats	In convenience center.
Power Window, Door Lock & Mirror	In convenience center.
Convenience Center	Under dash, to left of steering column. See Fig. 4 .
Fuse Block
2.5L Engine	Under left side of dash. See Fig. 2 .
4.3L Engine	Under left side of dash. See Fig. 3 .
Fusible Links
A/C Clutch Control Relay (Gray)	At battery junction block.
Alternator (Rust)	At starter solenoid (2 links).
Ignition Switch/Fuse Block (Black)	At battery junction block (2 Links).

GMC Safari 1990 CONTROL UNITS LOCATION

Component	Location
Audio Alarm Module	On bracket, above fuse block.
Cruise Control Module	Under dash, at right side of steering column. See Fig. 4 .
Digital Ratio Adapter Controller	On bracket, to left of radio. See Fig. 4 .
Electronic Control Module (ECM)
2.5L Engine	Behind right kick panel. See Fig. 2 .
4.3L Engine	Behind right kick panel. See Fig. 3 .
Elect. Spark Control (ESC) Module (4.3L)	On bracket, at center of right valve cover. See Fig. 3 .
Power Door Lock Module	Behind right kick panel.
RABS Electronic Control Unit	On bracket, at master cylinder.

GMC Safari 1990 SENDING UNITS & SENSORS LOCATION

Component	Location
Coolant Temp. Sending Unit/Switch
2.5L	On top rear of cylinder head.
4.3L	On side of left cylinder head.
Coolant Temperature Sensor
2.5L	In right side of thermostat housing. See Fig. 1 .
4.3L	On front of intake manifold. See Fig. 2 .
Knock Sensor (4.3L)	At left rear side of engine block. See Fig. 3 .
Manifold Absolute Press. (MAP) Sensor
2.5L	On air cleaner housing. See Fig. 2 .
4.3L	On valve cover bracket, next to TPS. See Fig. 3 .
Man. Air Temp. (MAT) Sensor (2.5L)	In No. 1 intake manifold runner. See Fig. 2 .
Oil Pressure Sending Unit/Switch
2.5L	In right side of block, above distributor. See Fig. 2 .
4.3L	On top of engine block, behind distributor. See Fig. 3 .
Oxygen Sensor
2.5L	In exhaust manifold. See Fig. 2 .
4.3L	In exhaust manifold. See Fig. 3 .
Throttle Position Sensor (TPS)
2.5L	On throttle body. See Fig. 2 .
4.3L	On throttle body. See Fig. 3 .
Vehicle Speed Sensor (VSS)
2.5L	At left rear of transmission. See Fig. 2 .
4.3L	At left rear of transmission. See Fig. 3 .

GMC Safari 1990 MOTORS LOCATION

Component	Location
Fuel Pump	On sending unit, in fuel tank.
Idle Air Control (IAC) Motor
2.5L Engine	On throttle body. See Fig. 2 .
4.3L Engine	On throttle body. See Fig. 3 .
Power Door Lock Motor	In bottom of each door.
Windshield Washer Motor	In washer reservoir.
Windshield Wiper Motor	On firewall, in engine compartment.

GMC Safari 1990 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
Air Diverter (EAC) Valve (4.3L)	On bracket, on rear of right valve cover. See Fig. 3 .
EGR Vacuum Solenoid
2.5L	On bracket, at front of engine. See Fig. 2 .
4.3L	On left rear of engine, near distributor. See Fig. 3 .
Torque Converter Clutch (TCC) Solenoid
2.5L	In automatic transmission. See Fig. 2 .
4.3L	In automatic transmission. See Fig. 3 .

GMC Safari 1990 SWITCHES LOCATION

Component	Location
A/C High Pressure Cut-Off Switch	On back of compressor.
Back-Up Light Switch	On transmission (M/T).
Brakelight Switch	On brake pedal bracket. See Fig. 4 .
Clutch Start Switch (M/T)	On clutch pedal bracket. See Fig. 4 .
Neutral Start/Back-Up Light Switch (A/T)	On steering column.
Power Steering Pressure Switch (PSPS)	In steering pressure hose, near steering gear. See Fig. 2 .

GMC Safari 1990 MISCELLANEOUS LOCATION

Component	Location
A/C-Heater Blower Resistor	In blower housing, near motor.
ALDL Diagnostic Connector
2.5L	Under left side of dash. See Fig. 2 .
4.3L	Under left side of dash. See Fig. 3 .
Engine Block Heater (4.3L)	In freeze plug hole, on left side of block.
Fuel Pump Prime/Test Connector
2.5L	In wiring harness, behind battery. See Fig. 2 .
4.3L	In wiring harness, near fuel pump relay. See Fig. 3 .
Tachometer Connector (4.3L)	In harness, next to ignition coil.