BUZZERS, RELAYS & TIMERS
| Component | Location | |
|---|---|---|
| A/C Clutch Relay | On top of A/C-heater housing, behind right side of dash. | |
| Auxiliary Battery Relay | On left front inner fender panel, above wheelwell. | |
| Auxiliary Cooling Fan Relay | On left front inner fender panel, near firewall. | |
| Blower Relays (High/Low) | ||
| Front | On top of front A/C-heater blower housing. | |
| Rear | On auxiliary A/C-heater blower housing. | |
| Center High Mounted Stop Light Relay | On right hand side of cowl, in engine compartment. | |
| Cold Advance Relay (6.5L) | On right rear of engine compartment, near battery junction block. | |
| Daytime Running Light (DRL) Relay | Behind left side of dash, below DRL module. | |
| Foglight Relay | Behind left side of dash, above convenience center. | |
| Fuel Pump Relay | ||
| 4.3L California | On right side of firewall. (Схема №1) | |
| 4.3L W/4L60E A/T | On right side of firewall. (Схема №2) | |
| 4.3L W/4L80E A/T | On right side of firewall. (Схема №3) | |
| 4.3L M/T | On right side of firewall. (Схема №4) | |
| 5.0L & 5.7L W/4L60E A/T | On right side of firewall. (Схема №5) | |
| 5.0L & 5.7L M/T | On right side of firewall. (Схема №6) | |
| 5.7L W/4L80E M/T | On right side of firewall. (Схема №7) | |
| 7.4L A/T | On right side of firewall. (Схема №8) | |
| 7.4L M/T | On right side of firewall. (Схема №9) | |
| Glow Plug Relay (6.5L) | On top left rear of engine. (Схема №10) | |
| Hazard Flasher Relay | Under left side of dash, near convenience center. | |
| Horn Relay | On convenience center. | |
| Power Amplifier Relay | Under left side of dash, on left of brake pedal bracket. | |
| Power Door Lock Relay | Under left side of dash, on right of brake pedal bracket. | |
| Rear Window Release Relay | Behind left side of dash, above steering column. | |
| Transfer Case Relay | On right side of firewall, near battery junction block cover. | |
| Turn Signal Flasher Relay | On convenience center. | |
BUZZERS, RELAYS & TIMERS LOCATION
CIRCUIT PROTECTION DEVICES
| Component | Location | |
|---|---|---|
| Circuit Breakers | On fuse block. | |
| Battery Junction Block | On right side of firewall. | |
| Convenience Center | Under left side of dash. | |
| Fuel Pump In-Line Fuse | ||
| 4.3L W/4L80E A/T | On right side of firewall, near fuel pump relay. (Схема №3) | |
| 5.0L & 5.7L W/4L60E A/T | On right side of firewall, near fuel pump relay. (Схема №5) | |
| 5.7L W/4L80E A/T | On right side of firewall, near fuel pump relay. (Схема №7) | |
| 5.0L & 5.7L M/T Heavy Duty | On right side of firewall, near fuel pump relay. (Схема №6) | |
| Fuse Block | ||
| 4.3L California | Under left side of dash. (Схема №1) | |
| 4.3L W/4L60E A/T | Under left side of dash. (Схема №2) | |
| 4.3L W/4L80E A/T | Under left side of dash. (Схема №3) | |
| 4.3L M/T | Under left side of dash. (Схема №4) | |
| 5.0L & 5.7L W/4L60E A/T | Under left side of dash. (Схема №5) | |
| 5.0L & 5.7L M/T | Under left side of dash. (Схема №6) | |
| 5.7L W/4L80E A/T | Under left side of dash. (Схема №7) | |
| 6.5L Diesel | Under left side of dash. (Схема №10) | |
| 7.4L A/T | Under left side of dash. (Схема №8) | |
| 7.4L M/T | Under left side of dash. (Схема №9) | |
| Fusible Links | At battery junction block. | |
| Power Mirror In-Line Fuse | Taped to crossbody harness under right side of dash. | |
CIRCUIT PROTECTION DEVICES LOCATION
CONTROL UNITS
| Component | Location | |
|---|---|---|
| ABS Diode Module | Under left side of dash. | |
| ABS Module | Mounted on side of brake master cylinder. | |
| Audio Alarm Module | On convenience center. | |
| Coolant Level Sensor Module | Behind center of dash. | |
| Cruise Control Module | Under left side of dash. (Схема №10) | |
| Daytime Running Lights (DRL) Module | Behind left side of dash, taped to panel wiring harness. | |
| Engine Control Module (ECM) (5.0L & 5.7L M/T Heavy Duty) | Behind right side of dash, near blower motor. (Схема №6) | |
| Glow Plug Controller (6.5L) | On left rear of intake manifold. | |
| Fuel Module | ||
| 5.7L Heavy Duty | Behind right side of dash, above blower motor. (Схема №6) | |
| 7.4L | Behind left side of dash, behind brake booster. | |
| Ignition Control Module | On center rear of engine, near ignition distributor. | |
| Knock Sensor Module (5.0L/5.7L M/T) | On top right of engine, on valve cover. (Схема №6) | |
| Powertrain Control Module (PCM) | ||
| 4.3L California | Behind right side of dash, near blower motor. (Схема №1) | |
| 4.3L W/4L60E A/T | Behind right side of dash, near blower motor. (Схема №2) | |
| 4.3L W/4L80E A/T | Behind right side of dash, near blower motor. (Схема №3) | |
| 4.3L M/T | Behind right side of dash, near blower motor. (Схема №4) | |
| 5.0L & 5.7L W/4L60E A/T | Behind right side of dash, near blower motor. (Схема №5) | |
| 5.7L W/4L80E A/T | Behind right side of dash, near blower motor. (Схема №7) | |
| 6.5L Diesel | Behind right side of dash, near blower motor. (Схема №10) | |
| 7.4L A/T | Behind right side of dash, near blower motor. (Схема №8) | |
| 7.4L M/T | Behind right side of dash, near blower motor. (Схема №9) | |
| Radio Receiver Module | Behind center of dash. | |
| Transmission Control Module (TCM) | Behind right side of dash. | |
| Wiper Motor Module | ||
| Front | On firewall, behind wiper motor. | |
| Rear | On lower inner center of rear window. | |
CONTROL UNITS LOCATION
SENDING UNITS & SENSORS
| Component | Location | ||
|---|---|---|---|
| Accelerator Pedal Position Sens | On accelerator pedal bracket. (Схема №10) | ||
| Boost Sensor (6.5L) | On top right center of engine. (Схема №10) | ||
| Coolant Level Sensor | On top right side of radiator. | ||
| Coolant Temp. Sending Unit/Switch | On front of left cylinder head. | ||
| Crankshaft Position Sensor | On bottom front of engine, near crank pulley. (Схема №10) | ||
| EGR Control Pressure/Baro Sensor | On left side of firewall. (Схема №10) | ||
| Engine Coolant Temp. (ECT) Sensor | |||
| 4.3L California | On top right front of engine, near thermostat housing. (Схема №1) | ||
| 4.3L W/4L60E A/T | On top right front of engine, near thermostat housing. (Схема №2) | ||
| 4.3L W/4L80E A/T | On top right front of engine, near thermostat housing. (Схема №3) | ||
| 4.3L M/T | On top right front of engine, near thermostat housing. (Схема №4) | ||
| 5.0L & 5.7L W/4L60E A/T | On top right front of engine, near thermostat housing. (Схема №5) | ||
| 5.0L & 5.7L M/T | On top right front of engine, near thermostat housing. (Схема №6) | ||
| 5.7L W/4L80E A/T | On top right front of engine, near thermostat housing. (Схема №7) | ||
| 7.4L A/T | On top right front of engine, near thermostat housing. (Схема №8) | ||
| 7.4L M/T | On top right front of engine, near thermostat housing. (Схема №9) | ||
| Engine Speed Sensor (6.5L) | On top rear of engine. | ||
| High Resolution Sensor (6.5L) | On top front of engine. (Схема №10) | ||
| Input Speed Sensor | |||
| 4.3L W/4L80E A/T | On left front side of transmission. (Схема №3) | ||
| 5.7L W/4L80E A/T | On left front side of transmission. (Схема №7) | ||
| 7.4L A/T | On left front side of transmission. (Схема №8) | ||
| Intake Air Temp. (IAT) Sensor | On top right center of engine. (Схема №10) | ||
| Knock Sensor | |||
| 4.3L (2) | |||
| California | On left and right rear side of engine, under exhaust manifold. (Схема №1) | ||
| W/4L60E A/T | On left and right rear side of engine, under exhaust manifold. (Схема №2) | ||
| W/4L80E A/T | On left and right rear side of engine, under exhaust manifold. (Схема №3) | ||
| M/T | On left and right rear side of engine, under exhaust manifold. (Схема №4) | ||
| 5.0L, 5.7L & 7.4L 5.0L & 5.7L W/4L60E A/T | On lower right front of engine, under exhaust manifold. (Схема №5) | ||
| 5.7L W/4L80E A/T | On lower right front of engine, under exhaust manifold. (Схема №7) | ||
| 7.4L A/T | On lower right front of engine, under exhaust manifold. (Схема №8) | ||
| 7.4L M/T | On lower right front of engine, under exhaust manifold. (Схема №9) | ||
| Low Coolant Sensor | On right rear side of radiator. | ||
| Manifold Abs. Press. (MAP) Sensor | |||
| Diesel Engines | On left side of firewall, near wiper motor. | ||
| Gasoline Engines | |||
| 4.3L California | On top right of engine, on valve cover. (Схема №1) | ||
| 4.3L W/4L60E A/T | On top right of engine, on valve cover. (Схема №2) | ||
| 4.3L W/4L80E A/T | On top right of engine, on valve cover. (Схема №3) | ||
| 4.3L M/T | On top right of engine, on valve cover. (Схема №4) | ||
| 5.0L & 5.7L W/4L60E A/T | On top right of engine, on valve cover. (Схема №5) | ||
| 5.0L & 5.7L M/T | On top right of engine, on valve cover. (Схема №6) | ||
| 7.4L A/T | On top right of engine, on valve cover. (Схема №8) | ||
| 7.4L M/T | On top right of engine, on valve cover. (Схема №9) | ||
| Output Speed Sensor (6.5L) | On left rear side of transmission. (Схема №8) | ||
| Throttle Position (TP) Sensor | |||
| Diesel Engines | On injection pump throttle valve. | ||
| Gasoline Engines | |||
| 4.3L California | On throttle body assembly. (Схема №1) | ||
| 4.3L W/4L60E A/T | On throttle body assembly. (Схема №2) | ||
| 4.3L W/4L80E A/T | On throttle body assembly. (Схема №3) | ||
| 4.3L M/T | On throttle body assembly. (Схема №4) | ||
| 5.0L & 5.7L W/4L60E A/T | On throttle body assembly. (Схема №5) | ||
| 5.0L & 5.7L M/T | On throttle body assembly. (Схема №6) | ||
| 5.7L W/4L80E A/T | On throttle body assembly. (Схема №7) | ||
| 7.4L A/T | On throttle body assembly. (Схема №8) | ||
| 7.4L M/T | On throttle body assembly. (Схема №9) | ||
| Vehicle Speed Sensor (VSS) | |||
| 4.3L California | On left side of transmission. (Схема №1) | ||
| 4.3L W/4L60E A/T | On left side of transmission. (Схема №2) | ||
| 4.3L W/4L80E A/T | On left side of transmission. (Схема №3) | ||
| 4.3L M/T | On left side of transmission. (Схема №4) | ||
| 5.0L & 5.7L W/4L60E A/T | On left side of transmission. (Схема №5) | ||
| 5.0L & 5.7L M/T | On left side of transmission. (Схема №6) | ||
| 5.7L W/4L80E A/T | On left side of transmission. (Схема №7) | ||
| 7.4L A/T | On left side of transmission. (Схема №8) | ||
| 7.4L M/T | On left side of transmission. (Схема №9) | ||
| Water-In-Fuel Sensor (6.5L) | In fuel filter assembly, on center rear of engine. | ||
| Wheel Speed Sensors | On left and right front wheel hub assembly. | ||
SENDING UNITS & SENSORS LOCATION
MOTORS
| Component | Location | |
|---|---|---|
| A/C Inlet/Mode Door Motor | On front and rear (if equipped) A/C-heater housing. | |
| Auxiliary Cooling Fan Motor | In front of radiator. | |
| Blower Motor | ||
| Front | Under right side of dash. | |
| Rear | Behind driver's seat, behind trim panel. | |
| Injection Timing Stepper Motor | On top right front of engine. (Схема №10) | |
| Vacuum Pump (6.5L) | On right front of engine. | |
| Washer Pumps (Front & Rear) | In washer fluid reservoir, near left shock tower. | |
| Wiper Motor (Front) | On left center of firewall. | |
MOTORS LOCATION
SOLENOIDS & SOLENOID VALVES
| Component | Location | |
|---|---|---|
| AIR By-Pass Solenoid (4.3L) | On lower right front of engine. | |
| Boost Solenoid (6.5L) | On top center of engine. (Схема №10) | |
| Canister Purge Solenoid | ||
| 4.3L California | On top right of engine, near MAP sensor. (Схема №1) | |
| 5.0L & 5.7L W/4L60E A/T | On top left front of engine. (Схема №5) | |
| 7.4L A/T | On top front center of engine. (Схема №8) | |
| 7.4L M/T | On top front center of engine. (Схема №9) | |
| Cold Start Advance Solenoid (6.5L) | On injection pump, on top right front of engine. | |
| EGR Elec. Vacuum Regulator Solenoid | ||
| 4.3L W/4L80E A/T | On top of right valve cover. (Схема №3) | |
| 5.0L & 5.7L M/T | On top of right valve cover. (Схема №6) | |
| 5.7L W/4L80E A/T | On top of right valve cover. (Схема №7) | |
| EGR Pulse Solenoid | On top left rear of engine. | |
| EGR Vacuum Solenoid | ||
| 4.3L W/4L60E A/T | On top left of engine, on valve cover. (Схема №2) | |
| 4.3L M/T | On top left of engine, on valve cover. (Схема №4) | |
| 5.0L & 5.7L W/4L60E A/T | On top left of engine, on valve cover. (Схема №5) | |
| 5.0L & 5.7L M/T | On top left of engine, on valve cover. (Схема №6) | |
| 6.5L Diesel | On top left of engine, on valve cover. (Схема №10) | |
| EGR Vent Solenoid (6.5L) | On top left rear of engine. (Схема №10) | |
| Engine Shutoff Solenoid (6.5L) | On left front of engine. (Схема №10) | |
| Exhaust Pressure Regulator (EPR) Valve (6.5L) | On top left rear of engine. | |
| Fast Idle Solenoid (6.5L) | On injection pump, on right top front of engine. | |
| Front Axle Solenoid | On right rear side of front differential case. | |
| Fuel Shutoff Solenoid (6.5L) | On injection pump, on top front of engine. | |
| Idle Air Control (IAC) Valve | ||
| 4.3L California | On throttle body assembly. (Схема №1) | |
| 4.3L W/4L60E A/T | On throttle body assembly. (Схема №2) | |
| 4.3L W/4L80E A/T | On throttle body assembly. (Схема №3) | |
| 4.3L M/T | On throttle body assembly. (Схема №4) | |
| 5.0L & 5.7L W/4L60E A/T | On throttle body assembly. (Схема №5) | |
| 5.0L & 5.7L M/T | On throttle body assembly. (Схема №6) | |
| 5.7L W/4L80E A/T | On throttle body assembly. (Схема №7) | |
| 7.4L A/T | On throttle body assembly. (Схема №8) | |
| 7.4L M/T | On throttle body assembly. (Схема №9) | |
| Idle Speed Actuator Solenoid (7.4L) | ||
| 7.4L A/T | On top right front of engine. (Схема №8) | |
| 7.4L M/T | On top right front of engine. (Схема №9) | |
| Rear Window Release Solenoid | Behind panel, center of tailgate. | |
SOLENOIDS & SOLENOID VALVES LOCATION
SWITCHES
| Component | Location | |
|---|---|---|
| A/C Low Pressure Cycling Switch | ||
| 4.3L California | On A/C accumulator, on right rear of engine compartment. (Схема №1) | |
| 4.3L W/4L60E A/T | On A/C accumulator, on right rear of engine compartment. (Схема №2) | |
| 4.3L W/4L80E A/T | On A/C accumulator, on right rear of engine compartment. (Схема №3) | |
| 4.3L M/T | On A/C accumulator, on right rear of engine compartment. (Схема №4) | |
| 5.7L W/4L80E A/T | On A/C accumulator, on right rear of engine compartment. (Схема №7) | |
| 7.4L A/T | On A/C accumulator, on right rear of engine compartment. (Схема №8) | |
| 7.4L M/T | On A/C accumulator, on right rear of engine compartment. (Схема №9) | |
| A/C High Pressure Cut-Out Switch | ||
| 4.3L California | On A/C compressor. (Схема №1) | |
| 4.3L W/4L60E A/T | On A/C compressor. (Схема №2) | |
| 4.3L W/4L80E A/T | On A/C compressor. (Схема №3) | |
| 4.3L M/T | On A/C compressor. (Схема №4) | |
| 5.0L & 5.7L W/4L60E A/T | On A/C compressor. (Схема №5) | |
| 5.0L & 5.7L M/T | On A/C compressor. (Схема №6) | |
| 5.7L W/4L80E A/T | On A/C compressor. (Схема №7) | |
| 7.4L A/T | On A/C compressor. (Схема №8) | |
| 7.4L M/T | On A/C compressor. (Схема №9) | |
| Auxiliary Cooling Fan Switch | On right cylinder head, near spark plug. | |
| Back-Up Light Switch (M/T) | On left side of transmission. | |
| Brake Pressure Warning Switch | In hydraulic brake combination valve, near master cylinder. | |
| Brake/Cruise/Stoplight Switch | On top of brake pedal bracket. | |
| Clutch/Start Switch | On top of clutch pedal bracket. | |
| Fast Idle Temp. Switch (6.5L) | On right rear of engine, above starter. | |
| Front Axle Solenoid Switch | Near differential case, at front of engine. | |
| Oil Pressure Switch | ||
| 4.3L California | On top left rear of engine, near distributor. (Схема №1) | |
| 4.3L W/4L60E A/T | On top left rear of engine, near distributor. (Схема №2) | |
| 4.3L W/4L80E A/T | On top left rear of engine, near distributor. (Схема №3) | |
| 4.3L M/T | On top left rear of engine, near distributor. (Схема №4) | |
| 5.0L & 5.7L W/4L60E A/T | On top left rear of engine, near distributor. (Схема №5) | |
| 5.0L & 5.7L M/T | On top left rear of engine, near distributor. (Схема №6) | |
| 5.7L W/4L80E A/T | On top left rear of engine, near distributor. (Схема №7) | |
| 7.4L A/T | On lower left front side of engine. (Схема №8) | |
| 7.4L M/T | On lower left front side of engine. (Схема №9) | |
| Park/Neutral/Backup Light Switch | On steering column, under dash. | |
| Parking Brake Switch | On parking brake pedal bracket. | |
| Seat Belt Retractor Switch | On driver's seat belt buckle. | |
| Transfer Case Switch | On left front of transfer case. | |
SWITCHES LOCATION
MISCELLANEOUS
| Component | Location | |
|---|---|---|
| Blower Motor Resistor | On front and rear (if equipped) blower motor housing. | |
| Data Link Connector (DLC) | ||
| 4.3L California | Under left side of dash, left of steering column. (Схема №1) | |
| 4.3L W/4L60E A/T | Under left side of dash, left of steering column. (Схема №2) | |
| 4.3L W/4L80E A/T | Under left side of dash, left of steering column. (Схема №3) | |
| 4.3L M/T | Under left side of dash, left of steering column. (Схема №4) | |
| 5.0L & 5.7L W/4L60E A/T | Under left side of dash, left of steering column. (Схема №5) | |
| 5.0L & 5.7L M/T | Under left side of dash, left of steering column. (Схема №6) | |
| 5.7L W/4L80E A/T | Under left side of dash, left of steering column. (Схема №7) | |
| 6.5L Diesel | Under left side of dash, left of steering column. (Схема №10) | |
| 7.4L A/T | Under left side of dash, left of steering column. (Схема №8) | |
| 7.4L M/T | Under left side of dash, left of steering column. (Схема №9) | |
| Fuel Heater (6.5L) | On fuel filter assembly. | |
| Fuel Pump Test Connector | ||
| 4.3L California | Under left side of dash, DLC terminal "G". (Схема №1) | |
| 4.3L W/4L60E A/T | Under left side of dash, DLC terminal "G". (Схема №2) | |
| 4.3L W/4L80E A/T | Under left side of dash, DLC terminal "G". (Схема №3) | |
| 4.3L M/T | Under left side of dash, DLC terminal "G". (Схема №4) | |
| 5.0L & 5.7L W/4L60E A/T | Under left side of dash, DLC terminal "G". (Схема №5) | |
| 5.0L & 5.7L M/T | Under left side of dash, DLC terminal "G". (Схема №6) | |
| 5.7L W/4L80E A/T | Under left side of dash, DLC terminal "G". (Схема №7) | |
| 7.4L A/T | Under left side of dash, DLC terminal "G". (Схема №8) | |
| 7.4L M/T | Under left side of dash, DLC terminal "G". (Схема №9) | |
| Fuel Solenoid Driver | On top left center of engine. (Схема №10) | |
| Idle Speed Actuator (7.4L) | ||
| 7.4L A/T | On top left center of engine. (Схема №8) | |
| 7.4L M/T | On top left center of engine. (Схема №9) | |
| Power Amplifier | Under driver's seat. | |
| Vehicle Speed Sensor Buffer | ||
| 4.3L California | Behind right side of dash. (Схема №1) | |
| 4.3L W/4L60E A/T | Behind right side of dash. (Схема №2) | |
| 4.3L W/4L80E A/T | Behind right side of dash. (Схема №3) | |
| 4.3L M/T | Behind right side of dash. (Схема №4) | |
| 5.0L & 5.7L W/4L60E A/T | Behind right side of dash. (Схема №5) | |
| 5.0L & 5.7L M/T | Behind right side of dash. (Схема №6) | |
| 5.7L W/4L80E A/T | Behind right side of dash. (Схема №7) | |
| 7.4L A/T | Behind right side of dash. (Схема №8) | |
| 7.4L M/T | Behind right side of dash. (Схема №9) | |
MISCELLANEOUS LOCATION