ELECTRICAL COMPONENT LOCATOR
1988 Jeep Cherokee
1988 ELECTRICAL COMPONENT LOCATOR Jeep Electrical Component Locations
Cherokee, Comanche & Wagoneer COMPONENT LOCATOR CHARTS
A/C Clutch Relay On right front wheelwell.
A/C-Heater Blower Relays
Automatic Load Leveling Relay
Under right side of dash, on evaporator housing.
On load level compressor bracket.
B+ Latch Relay
Choke Relay
Door Lock/Unlock Relays
On center of right front wheelwell.
On right front wheelwell.
Under dash, behind right kick panel.
Fog Light Relay
Behind right headlight, on wheelwell.
Fuel Pump Relay Horn Relay
Load Swap Relay
On right front wheelwell.
Taped to wiring harness, above fuse block.
On front of right front wheelwell.
Power Antenna Relay
Under right side of dash.
Rear Window Defogger Relay
Under instrument panel, to right of steering column.
Rear Wiper Relay
In tailgate, next to wiper motor.
Starter Relay (Graphic 1)
Behind right headlight, on wheelwell.
Starter Relay (Graphic 2)
Behind right headlight, on wheelwell.
Timer Delay Relay
Trailer Towing Relays,
Brake/Stop Light Relay (Cherokee)
Above starter relay, behind battery.
Above left rear wheelwell.
Left Turn Signal Relay
Brake/Stop Light Relay (Cherokee)
Right Turn Signal Relay
Above left rear wheelwell.
Above left rear wheelwell.
CIRCUIT PROTECTION DEVICES
Component
Circuit Breakers Power Accessories
Power Window
Trailer Towing Windshield Wiper Fuse Block
Component Location
In fuse block. In fuse block.
Above left rear wheelwell. On side of fuse block. Under left side of dash.
Fusible Links (Graphic 1)
At starter relay.
Fusible Links (Graphic 2)
At starter relay.
In-Line Fuses
A/C Signal Fuse
Near diode modules or above left front wheelwell.
Fuses A & B
Taped to engine wiring harness, near thermo-electric
switch.
Fuse C Taped to engine wiring harness, by alternator. Fuse D Taped to engine wiring harness, near power steering switch. Cruise Control Under left side of dash, near brake pedal. Radio Under center of dash, behind radio. |
CONTROL UNITS
Component
Audio Alarm Module
Cruise Control Regulator Module
Component Location
On side of fuse block.
Under dash, above brake pedal.
Elect. Control Unit (ECU)
Under dash, above accelerator pedal.
Ignition Control Module Intermittent Wiper Module Keyless Entry Receiver
In engine compartment, on right wheelwell.
Under left side of dash, above brake pedal.
Between sun visors.
Maint. Reminder Module
Sentinel Light Module
Under dash, to right of steering column.
Under left side of dash, near headlight switch.
System Sentry Control Module
Under dash, to right of steering column.
Transmission Control Module
Under right side of instrument panel.
MOTORS
Component
Component Location
A/C-Heater Blower Motor
In evaporator housing.
Automatic Load Level Compressor
In right rear corner of engine compartment.
Idle Speed Actuator (ISA) Motor
Power Door Lock Motor Power Window Motor
Rear Washer Motor Rear Wiper Motor
On right side of throttle body.
Behind trim panel in door.
Behind trim panel, in center of door.
In left front corner of engine compartment.
Behind trim panel, in upper center of tailgate.
Windshield Washer Motor
On windshield washer reservoir.
Windshield Wiper Motor
Under left side of cowl panel grille.
SENDING UNITS & SENSORS
Component
Automatic Load Leveling Sensor
Brake Pad Wear Sensors
Coolant Temp. Sending Unit/Switch
4-Cyl.
6-Cyl. Coolant Temperature Sensor
Component Location
On top of left rear axle.
In both inner front brake pads.
On top left rear of cylinder head.
On top front of cylinder head.
4-Cyl. (Graphic 1)
In left rear side of intake manifold.
4-Cyl. (Graphic 2) 6-Cyl. Engine Speed Sensor
In left rear side of intake manifold.
Left side of engine block, under intake manifold
Automatic Transmission
On left side of torque converter clutch.
Manual Transmission
Fluid Level Sensors Brake Fluid
On left side of bellhousing. In master cylinder.
Engine Coolant Engine Oil Front/Rear Axles Power Steering
Transfer Case Transmission
In coolant overflow bottle.
In oil pan.
On front/rear of differential.
In power steering pump reservoir.
In rear portion of transfer case.
On fill plug (M/T) or dipstick (A/T).
Windshield Washer
On bottom of windshield washer reservoir.
Fuel Gauge Sending Unit
In fuel tank.
Knock Sensor
On lower front of engine.
Manifold Absolute Pressure (MAP) Sensor
In engine compartment, on center of firewall.
Manifold Air Temperature (MAT) Sensor (Graphic 1)
On upper rear of intake manifold.
Manifold Air Temperature (MAT) Sensor (Graphic 2)
On upper rear of intake manifold.
Oil Pressure Sending Unit/Switch
On right side of block, near distributor.
Oxygen Sensor (Graphic 1)
In exhaust manifold, near exhaust pipe flange.
Oxygen Sensor (Graphic 2) Road Speed Sensor
In exhaust manifold, near exhaust pipe flange.
Under instrument cluster, in speedometer cable.
Throttle Position Sensor (TPS) (Graphic 1)
On throttle body.
Throttle Position Sensor (TPS) (Graphic 2)
On throttle body.
SOLENOIDS & SOLENOID VALVES
Component
Air Diverter Solenoid
Component Location
On right rear side of engine compartment.
EGR/Evaporator
Canister Solenoid
Idle Step-Up Solenoid
On middle of right front wheelwell.
On top fuel injection pump bracket.
Mixture Control Solenoid Shift Kicker Solenoid
On carburetor, near fuel line.
On left front wheelwell.
SWITCHES
Component
Component Location
A/C Low Pressure Switch
On top left side of radiator.
Automatic Load Leveling Sw.
Back-Up Light Sw. (Man. Trans.)
Back-Up/Neutral Sw. (Auto. Trans.)
Brake/Stop Light (Cruise) Switch
On compressor bracket, in engine compartment.
On left side of transmission case.
On left side of transmission case.
On brake pedal bracket.
Brake Warning Switch
Closed Throttle (Idle) Switch Command Track Switch Parking Brake Switch
On brake pressure differential valve, below master cylinder.
An integral part of ISA motor. On left side of transmission.
Under center console, at base of parking brake lever.
Power Steering
Switch (4-Cyl.)
Seat Belt Switch Select Trac Switch
On left side of power steering pump.
In driver’s seat belt buckle. On left side of transmission.
WOT Switch
On bracket, with ISA motor.
4WD Indicator Light Switch
In right rear corner of engine compartment.
MISCELLANEOUS COMPONENTS
Component
A/C Blocking Diode
A/C Clutch Diode
Component Location
Taped to engine wiring harness, above left wheelwell.
On A/C compressor.
A/C-Heater Blower Motor Resistors
Under right side of dash, on evaporator housing.
A/C Thermostat
Cruise Control Servo
Under right side of dash, on evaporator housing.
In engine compartment, on right wheelwell.
Diagnostic Connectors
On center of firewall or on left side of engine compartment.
Load Swap Diode Modules
In engine wiring harness, near alternator.
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