GM Storm/Spectrum 1985-1993 Repair Guide

Relays, Sensors and Computer Locations

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SPECTRUM





A/C Cycling Switch - is located behind the A/C compressor on the front grille support, if so equipped.
 
A/C Dual Pressure Switch - is mounted on the top of the A/C condenser, in the engine compartment.
 
A/C Relay - is located under the left side of the instrument panel, near the left kick panel.
 
A/C Resistor - is located behind the center console.
 
A/C Thermo Switch - is located on the A/C evaporator housing.
 
Air Inlet Temperature Sensor - is located on the bottom of the air cleaner assembly.
 
Altitude Sensing Switch - is located on the front of the carburetor.
 
Assembly Line Diagnostic Link - is located under the right side of the dash panel near the kick panel.
 
Back-Up Switch (manual transaxle) - is located on the top of the clutch pedal bracket.
 
Clutch/Start Switch (manual transaxle) - is located on the top of the clutch pedal bracket.
 
Check Engine Lamp Driver - is located under the right side of the dash panel near the kick panel, if so equipped.
 
Choke Relay - is located on the right side of the fire wall, in the engine compartment.
 
Coolant Temperature Sensor - see Engine Coolant Temperature Sensor.
 
Cooling Fan Relay - is located on the left front inner fender panel, in front of the battery.
 
Cruise Control Brake Disengage Switch - is located on top of the brake pedal bracket.
 
Cruise Control Clutch Disengage Switch (manual transaxle) - is located on top of the clutch pedal bracket.
 
Cruise Control Controller Unit - is located under the instrument panel, mounted to the steering support bracket.
 
Cruise Control Servo - is located in the left rear side of the engine compartment.
 
Diode Box - is located under the right side of the dash panel near the kick panel, if so equipped.
 
Early Fuel Evaporation Relay - is located on the right side of the firewall, in the engine compartment.
 
Electronic Control Module (ECM) - is located under the right side of the dash panel, behind the kick panel.
 
Engine Coolant Temperature Sensor - is located on the intake manifold on the engine.
 
FICD Relay - is located on the right side of the firewall, in the engine compartment.
 
Front Harness Diodes - are located under the left hand side of the instrument panel.
 
High Altitude Solenoid Valve - is located in the right rear of the engine compartment.
 
Key Warning Buzzer - is located near the center of the dash, to the right of the instrument panel.
 
Kick-Down Solenoid (automatic transaxle) - is located in the left side of the engine compartment.
 
Ignition Main Relay - is located behind the left hand side of the instrument panel.
 
Inhibit Switch (automatic transaxle) - is located on the right rear side of the transaxle.
 
Noise Filter - is located on the right front shock tower.
 
Oil Pressure Switch - is located on the lower right rear section of the engine.
 
Oxygen Sensor - is located in the exhaust manifold.
 
Power Steering Pressure Switch - is located on the power steering hydraulic pressure line.
 
Rear Window Defogger Relay - is located behind the left hand side of the instrument panel.
 
Restart Relay - is located under the left side of the instrument panel, near the left kick panel.
 
Seatbelt Timer - is located on the back of the instrument panel cluster.
 
Seatbelt Switch - is located in the driver's seatbelt.
 
Stop Light Relay - is located in the rear trunk panel, if so equipped.
 
Throttle Positioner Switch - is located on the side of the carburetor.
 
Transaxle Gear Switches - are located on the top rear side of the transaxle.
 
Turn Signal/Hazard Flasher Relay - is located behind the left hand side of the instrument panel.
 
Upshift Relay - is located under the left side of the instrument panel, near the left kick panel.
 
Vehicle Speed Sensor - is located on the side of the transaxle, if so equipped.
 
Windshield Wiper Delay Relay - is located behind the left hand side of the instrument panel.
 

STORM





A/C Cut Control Unit - is mounted of top of evaporator housing.
 
A/C Switch - is located in center of instrument panel.
 
A/C Thermo Switch - is located in the left front of the engine compartment, near the distributor.
 
Air Bag - see Supplement Inflatable Restraint (SIR).
 
Assembly Line Diagnostic Link (ALDL) - is located behind the right side kick panel.
 
Audio Alarm Module - is located behind the left side kick panel, attached to the junction block.
 
Automatic Transaxle Controller - is located behind the dash, left of the steering column.
 
Automatic Transaxle Kickdown Switch - is located on top of the accelerator pedal assembly.
 
Back-Up Lamp Switch - is located on top center of transaxle.
 
Brake Fluid Switch - is mounted on brake fluid reservoir.
 
Canister Purge Vacuum Switching Valve - is located in the rear of the engine compartment, near the bulkhead.
 
Clutch Interrupt Switch - is located above clutch pedal.
 
Clutch Start Switch - is located above clutch pedal.
 
Combination Switch - is located on left side of steering column.
 
Coolant Temperature Sensor - is located on thermostat housing.
 
Diagnostic Connector - is located in the right lower kick panel.
 
Diagnostic Energy Reserve Module (DERM) - is located under center console.
 
Door Switch (left) - is located in left door jam.
 
Door Switch (right) - is located in right door jam.
 
Economy Switch - is located in center of console.
 
EGR Temperature Sensor - is located in rear of engine compartment, near the bulkhead.
 
EGR Vacuum Switching Valve - is located in rear of engine compartment.
 
Electronic Thermo Switch - is located on top of the evaporator housing.
 
Engine Control Module (ECM) - is located behind the left kick panel.
 
Fan Relay - is located in the relay box.
 
Fan Switch - is located behind center of instrument panel.
 
Flasher Unit - is located behind lower left instrument panel.
 
Fog Lamp Switch - is located on instrument panel, left of steering column.
 
Fuel Pump Relay - is located in the relay box.
 
Fuse Block - is located behind left kick panel.
 
Fuse and Relay Box - is located in left engine compartment.
 
Horn Relay - is located in the relay box.
 
Idle Air Control Valve - is located on the rear of the engine, near the bulkhead.
 
Ignition Switch - is located on the right steering column.
 
Inhibitor Switch - is located on top center of transaxle.
 
Intake Air Temperature Sensor - is located rear of engine compartment, near the bulkhead.
 
Intake Air Vacuum Switching Valve - is located rear of engine compartment.
 
Intermittent Windshield Wiper Relay - is located behind lower left of instrument panel.
 
Junction Connector - is located behind center of instrument panel.
 
Junction Block - is located behind the left side kick panel.
 
Manifold Absolute Pressure (MAP) Sensor - is located center of bulkhead.
 
Oil Pressure Switch - is located right rear corner of engine.
 
Oxygen Sensor - is located in engine compartment, on exhaust manifold.
 
Parking Brake Switch - is located on parking brake.
 
Park/Neutral Switch - is located on top center of transaxle.
 
Power Steering Pressure Switch - is located on power steering pump.
 
Radiator Fan Thermo Switch - is located on lower left side of radiator.
 
Rear Defogger Relay - is located behind left side of instrument panel, in junction block.
 
Relay Box - in right side of engine compartment, near the strut tower.
 
Safety Belt Switch - is located on base of driver's safety belt buckle.
 
Shift Interlock Control Module - is located under the center console, near the gear selector.
 
SIR Arming Sensor - is located behind center of instrument panel
 
SIR Forward Discriminating Sensor - is located in engine compartment behind grille.
 
SIR Module - is located behind steering wheel.
 
SIR Passenger Compartment Sensor - is located under console assembly.
 
Stop Lamp Switch - is located above the brake pedal.
 
Throttle Position Sensor - is located on common chamber of engine.
 
Upshift Indicator Relay - is located behind the right kick panel.
 
Upshift Indicator Switch - is located on the transaxle, near the battery.
 
Triple Switch - is located on the right front of the engine, near the radiator.
 
Vehicle Speed Sensor - is located on rear of transaxle.
 
Windshield Wiper/Washer Switch - is located on instrument panel, right of cluster.
 

 
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