Chevrolet Corvette 1991 - ELECTRICAL COMPONENT LOCATOR 1991 ELECTRICAL COMPONENT LOCATIONS General Motors Corp. - Electrical Components

Chevrolet Corvette 1991 - BUZZERS, RELAYS & TIMERS

Chevrolet Corvette 1991 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
ABS Control Module Relay Overvoltage Relay	Under left storage compartment, behind driver's seat.
ABS Indicator Light Relay	Under left storage compartment, behind driver's seat.
ABS Solenoid Relay	On top of modulator assembly.
A/C Clutch Relay	Behind left side of dash, left of steering column. See Fig. 1 & 2.
Air Pump Relay	On top of air pump.
Air Bag System
Arming Sensor	Behind center of dash, on DERM.
Discriminating Sensors	On frame rail under battery and on frame rail below heater housing.
Antenna Relay	In luggage compartment, above left rear of wheelwell.
Blower Relay (High & Low)	On left side of engine compartment, on wheelwell.
Cooling Fan Relays (2)	On left side of radiator shroud. See Fig. 1 .
Courtesy Light Relay	Behind right side of dash. See Fig. 3 .
Defogger Relay	Behind right side of dash. See Fig. 3 .
Delayed Accy. Bus (DAB) Relay	Below left side of dash.
Fog Light Relay	Under right side of dash. See Fig. 3 .
Fuel Pump Relay
No. 1	Behind right side of dash, to left of glove compartment. See Fig. 1 & 3.
No. 2	Behind left side of dash. See Fig. 2 .
Hazard Flasher Relay	In convenience center.
Horn Relay	Behind right side of dash. See Fig. 3 .
Radio Amplifier Relay	Behind left side of dash, near right of instrument cluster. See Fig. 2 .
Rear Hatch Release Relay	In right rear corner of luggage compartment.
Starter Enable Relay	Behind left side of dash, left of steering column. See Fig. 2 .
Turn Signal Flasher Relay	Behind right side of dash panel, near fuse block. See Fig. 2 .
1-4 Up-Shift Relay (M/T)	Left rear of engine compartment, behind battery. See Fig. 1 .

Chevrolet Corvette 1991 - CIRCUIT PROTECTION DEVICES

Chevrolet Corvette 1991 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Convenience Center	Behind right side of dash.
Defogger Circuit Breaker	In fuse block.
Fuse Block
Auxiliary	Behind right side of dash, near radio receiver box. See Fig. 1 .
Main	Under right side of dash. See Fig. 1 .
Power Accessory Circuit Breaker	In fuse block.
Power Window Circuit Breaker	In fuse block.
Rear Hatch Circuit Breaker	In fuse block.
Underhood Light In-Line Fuse	Attached to left front side marker light.
Vacuum Pump Fuse	On left rear of engine compartment, near cruise control servo.

Chevrolet Corvette 1991 - CONTROL UNITS

Chevrolet Corvette 1991 CONTROL UNITS LOCATION

Component	Location
ABS Control Module	Under left rear corner of floor, in storage compartment.
A/C-Heater Programmer	Behind left side of dash, right of steering column.
Air Bag Resistor Module	Behind center of dash, near radio control head.
Blower Control Module (Auto. A/C)	In right side of engine compartment, on firewall.
Central Control Module (CCM)	Behind center of dash. See Fig. 4 .
Cruise Control Module	Behind right side of dash, near radio receiver box.
Diag. Energy Reserve Mod. (DERM)	Behind center of dash.
Diode Module	Behind right side of dash.
Electronic Control Module (ECM)	On left rear of engine compartment, near battery. See Fig. 1 .
Headlight Door Control Module	In lower left front of engine compartment.
Low Tire Pressure Warning System Module	Behind right side of dash. See Fig. 4 .
Select Ride Control Module (Opt.)	Under left corner of rear floor, in storage compartment.
Wiper/Washer Motor Module	On left side of firewall.

Chevrolet Corvette 1991 - SENDING UNITS & SENSORS

Chevrolet Corvette 1991 SENDING UNITS & SENSORS LOCATION

Component	Location
ABS Wheel Sensors	On each wheel spindle.
A/C Ambient Temperature Sensor	On right top corner of radiator.
Coolant Level Sensor	On right side of radiator.
Coolant Temperature Sensor	On front of engine, below throttle body. See Fig. 1 .
Engine Oil Level Sensor	Bottom left side of oil pan.
Engine Oil Temperature Sensor	On lower left side of engine, above oil filter. See Fig. 1 .
Engine Temperature Sensor	On right rear or engine. See Fig. 1 .
In-Car Temperature Sensor	Behind right center of A/C outlet.
Knock Sensor	On right side of engine, near starter. See Fig. 1 .
Low Tire Pressure Sensors	On each wheel assembly, inside tire.
Man. Absolute Press. (MAP) Sensor	On right rear of intake plenum. See Fig. 1 .
Manifold Air Temp. (MAT) Sensor	On right rear of engine, under plenum. See Fig. 1 .
Sunload Sensor	On top of dash, on center of defroster grille.
Throttle Position Sensor (TPS)	On throttle body. See Fig. 1 .
Vehicle Speed Sensor (VSS)	On left of transmission tailshaft.

Chevrolet Corvette 1991 - MOTORS

Chevrolet Corvette 1991 MOTORS LOCATION

Component	Location
ABS Return Pump	Non-serviceable part of modulator valve assembly.
A/C-Heater Blower Motor	On right side of A/C-heater plenum.
Cooling Fan Motors	In front of engine compartment.
Fuel Pump Motor	In fuel tank.
Headlight Door Motor	Behind headlight assemblies.
Idle Air Control (IAC) Motor	On throttle body. See Fig. 1 .
Power Antenna Motor	In left rear corner of luggage compartment.
Power Door Lock Motor	One in each door.
Power Seat Motors	Under seat.
Power Window Motors	In lower section of doors.
Windshield Washer Motor	On right side of firewall.
Windshield Wiper Motor	In upper center of firewall.

Chevrolet Corvette 1991 - SOLENOIDS & SOLENOID VALVES

Chevrolet Corvette 1991 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
AIR Converter Solenoid	On right front of engine. See Fig. 1 .
AIR Port Solenoid	On right front of engine. See Fig. 1 .
Canister Purge Solenoid	On middle right of engine, near plenum. See Fig. 1 .
Deck Lid Release Solenoid
Left Side	On left rear of luggage compartment, above wheelwell.
Right Side	On right side of luggage compartment, near side marker.
EGR Solenoid	On left front of engine, near coolant outlet. See Fig. 1 .
Electric Air Control (EAC) Solenoid	At front of engine, above right valve cover.
Elec. Air Switching (EAS) Solenoid	At front of engine, above right valve cover.
TCC Solenoid (A/T)	On left rear side of transmission.
1-4 Upshift Solenoid (M/T)	On left side of transmission. See Fig. 1 .

Chevrolet Corvette 1991 - SWITCHES

Chevrolet Corvette 1991 SWITCHES LOCATION

Component	Location
A/C Cooling Fan Switch	On right side engine of engine compartment, on A/C high side line. See Fig. 1 .
A/C High Pressure Cut-Out Switch	In right rear corner of engine compartment, on high side A/C line.
A/C Pressure Cycling Switch	On evaporator housing, on A/C low side line. See Fig. 1 .
Back-Up Light Switch (M/T)	On lower left side of transmission.
Brake Fluid Level Switch	On master cylinder.
Brake Pressure Switch	On master cylinder.
Brake Stoplight/TCC Switch	On top of brake pedal bracket assembly.
Clutch Start Switch	On top of clutch pedal bracket.
Cooling Fan Temp. Switch (H.D.)	On left side of engine, behind alternator.
Cruise Control Clutch Switch	On steering column support, behind brake pedal.
Cruise/TCC Brake Switch	On steering column support, behind brake pedal.
Door Ajar Switches	In each door.
Fuel Pump/Oil Pressure Switch	On rear of engine, near distributor.
Hatch Ajar Switch	In luggage compartment, near hatch release.
Headlight Dimmer Switch	On steering column, opposite ignition switch.
Ignition Key Warning Switch	In top of steering column.
Lateral Acceleration Switch	Below center console.
Manual Overdrive Defeat Switch	In front floor console.
Neutral/Start Switch	On shift lever.
Oil Pressure/Fuel Pump Switch	On left rear of engine, near distributor. See Fig. 1 .
Overdrive Select Switch (A/T)	In console, near shifter.
Parking Brake Switch	Under parking brake lever.
Seat Belt Switch	In driver's side seat belt buckle assembly.
Transmission Position Switch	On base of shift control lever.
Transmission Switches
1st Gear	On left side of transmission.
4th Gear (A/T)	On left side of transmission.

Chevrolet Corvette 1991 - MISCELLANEOUS

Chevrolet Corvette 1991 MISCELLANEOUS LOCATION

Component	Location
ABS Diode	Below left rear floor storage compartment.
ABS Modulator Valve Assembly	Under left corner of rear floor, in storage compartment.
A/C Compressor Clutch Diode	Taped in A/C compressor clutch connector.
A/C-Heater Blower Resistor (Man. A/C)	On left side of evaporator, in engine compartment.
ALDL Diagnostic Connector	Under left side of dash, to right of steering column. See Fig. 1 & 4.
Blower Motor Resistors	In left side of evaporator.
EST Connector	Behind distributor, at firewall.
Fuel Pump "Test" Connector	ALDL terminal "G". See Fig. 1 .
Headlight Actuators	Next to each headlight assembly.
Jump Start Junction Block	In left rear corner of engine compartment, behind battery.
Radio Receiver Box	Under right side of dash, near kick panel.
Set Timing Connector	To right of master cylinder. See Fig. 1 .
Tach Filter	Behind left cylinder head.
Tone Generator	Behind left side of dash, above DIC. See Fig. 4 .
Vehicle Speed Sensor Buffer	In instrument panel.