GMC Rally G2500 (1985-1995) pnk/wht Wiring diagrams

1-2 SHIFT SOL TCC SOL 2-3 SHIFT SOL 3-2 SHIFT SOL ACCELERATOR PEDAL POSITION (APP) MODULE (TOP OF ACCEL- ERATOR BRACKET) APP #2 PNK PPL WIRE APP #3 APP #3 SENSOR SIG APP 1 BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BRK FUSE BRN WIRE DATA LINK CONNECTOR (BELOW LEFT SIDE OF I/P) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM I FUSE ECM-B FUSE ELECTRONIC 4-SPEED AUTOMATIC OVERDRIVE TRANSMISSION ENGINE COOLANT TEMPERATURE (ECT) SENSOR (RIGHT SIDE OF ENGINE) HOT AT ALL TIMES HOT IN RUN HOT IN START OR RUN HOT IN START OR RUN FUSE BLOCK TRANS FUSE INGNITION FEED 3-2 CONTROL SOL DIAGNOSTIC REQUEST LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PNK/BLK WIRE PNK/WHT WIRE POWERTRAIN CONTROL MODULE PPL PPL APP #2 SENSOR GROUND APP #1 SENSOR GROUND APP #3 SENSOR GROUND SENSOR GROUND PPL TCC/BRAKE SW VEHICLE SPEED SIG PPL/WHT WIRE PRESSURE CONTROL SOLENOID RANGE MODE SELECTOR RED WIRE RED/BLK WIRE SPEED SENSOR (LEFT REAR SIDE OF TRANSMISSION) TAN WIRE TAN/BLK WIRE TCC/ BRAKE SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) TRANS FLUID TEMP (TFT) SENSOR TRANSFER CASE SWITCH VEHICLE SPEED SENSOR BUFFER (UNDER RIGHT END OF I/P) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

1995 VFTC BLK WIRE BLU WIRE BRAKE FUSE BRAKE IND BRAKE PRESSURE MODULATOR VALVE (UNDER RIGHT SIDE OF VEHICLE, AT FRAME RAIL) BRAKE PRESSURE WARNING SWITCH (REAR OF BRAKE MODULATOR VALVE) BRAKE WARN IND BPMV GND COLUMN) DATA LINK CONNECTOR (BELOW STEERING DAYTIME RUNNING LAMPS MODULE (LEFT SIDE OF I/P) IGNITION SWITCH DIODE ARRAY MODULE (UNDER LEFT SIDE OF I/P) DK GRN WIRE FUSE BLOCK FUSIBLE LINK (16 GA-RUST) GAUGES FUSE GRN WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN, BULB TEST OR START I/P IGN FEED ABS IND BRAKE SW INSTRUMENT CLUSTER LEFT FRONT WHEEL SENSOR LF SENSOR LO RF SENSOR LO LT BLU WIRE NCA WIRE PARK BRAKE SWITCH PNK WIRE PNK/WHT WIRE PPL PUMP MOTOR PWR PUMP MOTOR GND RED WIRE RF SENSOR HI LF SENSOR HI RIGHT FRONT WHEEL SENSOR TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC/BRAKE SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) PPL VEHICLE SPEED IN DIAG REQUEST VEHICLE SPEED OUTPUT VEHICLE SPEED SENSOR BUFFER (ON PARKING BRAKE SUPPORT BRACKET) WHT WIRE YEL WIRE

1995 VFTC AIR BAG IND ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BRAKE IND BRAKE PRESSURE WARNING SWITCH (NEAR MASTER CYLINDER) BRN WIRE BRN/WHT WIRE COOLANT TEMP GAUGE CRUISE CONTROL SYSTEM DAYTIME RUNNING LIGHTS IND DAYTIME RUNNING LIGHTS RELAY (LEFT SIDE OF I/P) DIAGNOSTIC ENERGY RESERVE MODULE (LEFT SIDE OF I/P) DIESEL DIESEL ONLY DIODE ARRAY MODULE (BEHIND LEFT SIDE OF I/P, IN HARNESS) DK BLU WIRE DK GRN WIRE ENGINE CONTROLS SYSTEM ENGINE COOLANT LEVEL INDICATOR MODULE (LEFT SIDE OF I/P) ENGINE COOLANT LEVEL SENSOR (RIGHT REAR OF RADIATOR) ENGINE COOLANT TEMPERATURE SENDER (REAR OF ENGINE) FASTEN BELTS IND. FUEL GAUGE FUEL PUMP AND SENDER (TOP OF FUEL TANK) GASOLINE ONLY FUEL PUMP OIL PRESSURE SWITCH (TOP REAR OF ENGINE) FUEL TANK SENDER (TOP OF FUEL TANK) FUSE BLOCK GASOLINE GAUGES FUSE BRK FUSE GRY WIRE HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM (DRL SYSTEM) HOT IN START OR RUN HOT IN RUN ILLUM. LAMPS INSTRUMENT CLUSTER LEFT TURN IND LOW COOLANT IND. (DIESEL) LT BLU WIRE LT BLU/BLK WIRE LT GRN (OR WHT) WIRE LT GRN WIRE LT GRN/BLK WIRE MAL- FUNCTION IND NCA WIRE OIL PRESS GAUGE OIL PRESSURE SENDER (TOP FRONT OF ENGINE) PARK BRAKE WARNING SWITCH (PARK BRAKE) BRACKET) PNK WIRE PNK/BLK WIRE PNK/WHT WIRE POWERTRAIN CONTROL MODULE (RIGHT SIDE OF I/P) PPL PPL PNK WIRE PPL/WHT WIRE PRESSURE MODULATOR VALVE (RIGHT SIDE FRAME RAIL) RIGHT TURN IND. HI BEAM IND. SPEED- OMETER TAN WIRE TAN/WHT WIRE VEHICLE SPEED SENSOR (REAR OF TRANSMISSION) VOLT- METER W/ DRL W/O DRL WARNING SYSTEMS WHT TAN/ WIRE WHT WIRE YEL WIRE YEL/BLK WIRE

ACC RADIO FUSE ACCY BATTERY JUNCTION BLOCK BLK WIRE BODY BUILDER'S DAYTIME RUNNING LAMPS JUNCTION BLOCK RELAY BRAKE WARNING SYSTEM (WARNING SYSTEMS) BRN WIRE BULB TEST CLUTCH DAYTIME RUNNING LAMPS MODULE WIPER MOTOR DK GRN WIRE ECM BAT FUSE FROM PANEL DIMMER SWITCH FROM PARK BRAKE WARNING SWITCH FUEL CYCLE MODULE DAYTIME RUNNING LAMPS RELAY FUEL PUMP RELAY, FUEL PUMP/ OIL PRESSURE SWITCH FUSE BLOCK FUSE BLOCK, GLOW PLUG CONTROLLER FUSIBLE FUSIBLE LINK E GAGES FUSE SHUNT GENERATOR GRY WIRE HAZARD FLASHER HEADLIGHT SWITCH ASSEMBLY HORN RELAY HORN/DM TAIL LPS FUSE FUSE HTR FUSE IGNITION SWITCH INSTR LPS FUSE INSTRUMENT TRANSMISSION CLUSTER RANGE INDICATOR LAMP LINK A LINK B LINK C LINK D LINK F LOCK LOCK OFF OFF ORG/ WIRE PCM PNK WIRE PNK/WHT WIRE POWERTRAIN CONTROL MODULE PPL RED WIRE RIGHT FRONT BATTERY LEFT REAR BATTERY RUN WIRE SHUNT STARTER RELAY STARTER SOLENOID STOP- HZ FUSE STOPLAMP SWITCH SWITCH TAN/WHT WIRE TO GLOW PLUG CONTROLLER W/ AUTO TRANSMISSION W/ MANUAL TRANSMISSION ONLY PPL WHT WIRE WIPER FUSE WIPER SWITCH

1995 VFTC ACC RADIO FUSE ACCY ACCY BULB TEST LOCK OFF ALT, ECM-CRANK, TURN-B/U, TRANS AND INJ FUSES BATT BUS BATTERY BATTERY JUNCTION BLOCK BLK WIRE BLK/RED WIRE BODY BUILDER'S JUNCTION BLOCK BRAKE WARNING SYSTEM (WARNING SYSTEMS) BRN WIRE BULB TEST CLUTCH DAYTIME RUNNING LAMPS HORN RELAY DAYTIME RUNNING LAMPS RELAY DAYTIME RUNNING LAMPS MODULE DK GRN WIRE ECM-BAT FUSE ACC BUS EXHAUST GAS REGULATOR SOLENOID VALVE GENERATOR FUEL CYCLE MODULE FUEL PUMP RELAY, FUEL PUMP/ OIL PRESSURE SWITCH FUSE BLOCK FUSIBLE LINK A FUSIBLE LINK C FUSIBLE LINK D GAGES FUSE SHUNT GENERATOR GRY WIRE HAZARD FLASHER HEADLIGHT SWITCH ASSEMBLY HEATED OXYGEN SENSOR (VIN Z) HORN/DM FUSE HTR FUSE HTR BUS IGNITION SWITCH INSTR-LPS CRANK FUSE FUSE LINK B FUSIBLE LOCK LOCK OFF OFF ORG/ WIRE PARK BRAKE WARNING SWITCH PCM PNK WIRE PNK/WHT WIRE POWERTRAIN CONTROL MODULE PPL RED WIRE RELAY RUN WIRE SHUNT STARTER SOLENOID STOP- HZ FUSE STOPLAMP SWITCH SWITCH PANEL DIMMER SWITCH (INTERIOR LIGHTS SYSTEM) TAIL LPS FUSE TAN/WHT WIRE TRANSMISSION CONTROL MODULE W/ AUTO TRANS WHT WIRE WIPER FUSE WIPER MOTOR WIPER SWITCH WITH MANUAL TRANSMISSION ONLY

1995 VFTC AUXILIARY COOLING FAN CONTROL RELAY AUXILIARY FUSE BLOCK BASE MODELS BATT BUS BATTERY JUNCTION BLOCK BLK WIRE BRAKE FUSE BRN WIRE CIGARETTE LIGHTER DAYTIME RUNNING LAMPS RELAY DRL FUSE F/PMP FUSE FORWARD BATTERY FOUR- WHEEL ANTILOCK BRAKE MODULE FOUR- WHEEL ANTILOCK BRAKE MODULE ELECTRONIC INJECTION PUMP (DRIVER) FROM IGNITION SWITCH FRONT DOME LAMP FUEL SHUT OFF SOLENOID FUSE BLOCK FUSIBLE FUSIBLE LINK GLOW PLUG CONTROL MODULE GLOW PLUG CONTROLLER GENERATOR HEADLIGHT RADIO SWITCH ASSEMBLY HIGH BLOWER RELAY HORN RELAY INTERIOR LIGHTING CONTROL SWITCH REAR DOME LAMP HORN- DM FUSE IN-LINE FUSE LINK ORG/ WIRE PNK PNK WIRE PNK WIRE PNK/WHT WIRE POWER MIRROR CONTROL SWITCH RIGHT VISOR MIRROR LAMP LEFT VISOR MIRROR LAMP POWERTRAIN PULSE WIPER WIPER/ CONTROL WASHER MOTOR MODULE SWITCH MODULE PWR ACC BUS RADIO FUSE WIPER FUSE ECMB FUSE RADIO WINDSHIELD REAR BATTERY RED WIRE SHUNT STARTER MOTOR TAIL LPS FUSE TO IGNITION SWITCH TO STOP-HZ FUSE, PWR ACC CIRCUIT BREAKER (FUSE BLOCK) TO TRAILER WIRING VEHICLE SPEED SENSOR BUFFER VIN P ONLY VIN Y ONLY WHT WIRE WITH DOME AND STEPWELL LAMPS ONLY YEL WIRE

3 121 PNK WIRE ACCY AUXILIARY FUSE BLOCK BLK WIRE BLK/RED WIRE BLK/YEL WIRE BRAKE FUSE BRN WIRE BRN/WHT WIRE BULB TEST DISTRIBUTOR (CENTER REAR OF ENGINE) DK BLU WIRE DK GRN/WHT WIRE ENGINE COOLANT TEMPERATURE SENSOR (ON INTAKE MANIFOLD) FUSE BLOCK GAGES FUSE GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN, BULB TEST OR START IGNITION COIL (TOP RIGHT REAR OF ENGINE) IGNITION SWITCH INSTRUMENT CLUSTER KNOCK SENSOR (LEFT REAR OF ENGINE, NEAR OIL PRESSURE SENDER) LOCK OFF LT BLU/WHT WIRE LT GRN WIRE MALFUNCTION (SERVICE ENGINE SOON) INDICATOR MANIFOLD ABSOLUTE PRESSURE SENSOR (ABOVE VALVE COVER) NCA WIRE ORG/BLK WIRE PNK PPL 23 24 WIRE PNK WIRE PNK/BLK WIRE PNK/WHT WIRE PPL PPL 21 22 PPL 3 4 PPL/WHT WIRE RED WIRE RED/BLK WIRE RUN WIRE TACHOMETER TEST LEAD TAN/BLK WIRE TCC/BRAKE SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) THROTTLE POSITION SENSOR (ON THROTTLE BODY) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

3 121 PNK WIRE ACCY AUXILIARY FUSE BLOCK BLK WIRE BLK/RED WIRE BLK/YEL WIRE BRAKE FUSE BRN WIRE BRN/WHT WIRE BULB TEST DISTRIBUTOR (CENTER REAR OF ENGINE) DK BLU WIRE DK GRN/WHT WIRE ENGINE COOLANT TEMPERATURE SENSOR (ON INTAKE MANIFOLD) FUSE BLOCK GAGES FUSE GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN, BULB TEST OR START IGNITION COIL (TOP RIGHT REAR OF ENGINE) IGNITION SWITCH INSTRUMENT CLUSTER KNOCK SENSOR (LEFT REAR OF ENGINE, NEAR OIL PRESSURE SENDER) LOCK OFF LT BLU/WHT WIRE LT GRN WIRE MALFUNCTION (SERVICE ENGINE SOON) INDICATOR MANIFOLD ABSOLUTE PRESSURE SENSOR (ABOVE VALVE COVER) NCA WIRE ORG/BLK WIRE PNK WIRE PNK/BLK WIRE PNK/WHT WIRE PPL PPL 1 2 3 4 PPL 21 22 PPL 3 4 PPL/WHT WIRE RED WIRE RED/BLK WIRE RUN WIRE TACHOMETER TEST LEAD TAN/BLK WIRE TCC/BRAKE SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) THROTTLE POSITION SENSOR (ON THROTTLE BODY) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

3 121 PNK WIRE ACCY AUXILIARY FUSE BLOCK BLK WIRE BLK/RED WIRE BLK/YEL WIRE BRAKE FUSE BRN WIRE BRN/WHT WIRE BULB TEST DISTRIBUTOR (CENTER REAR OF ENGINE) DK BLU WIRE DK GRN/WHT WIRE ENGINE COOLANT TEMPERATURE SENSOR (ON INTAKE MANIFOLD) FUSE BLOCK GAGES FUSE GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN, BULB TEST OR START IGNITION COIL (TOP RIGHT REAR OF ENGINE) IGNITION SWITCH INSTRUMENT CLUSTER KNOCK SENSOR (LEFT REAR OF ENGINE, NEAR OIL PRESSURE SENDER) LOCK OFF LT BLU/WHT WIRE LT GRN WIRE MALFUNCTION (SERVICE ENGINE SOON) INDICATOR MANIFOLD ABSOLUTE PRESSURE SENSOR (ABOVE VALVE COVER) NCA WIRE ORG/BLK WIRE PNK PPL 23 24 WIRE PNK WIRE PNK/BLK WIRE PNK/WHT WIRE PPL PPL 21 22 PPL 3 4 PPL/WHT WIRE RED WIRE RED/BLK WIRE RUN WIRE TACHOMETER TEST LEAD TAN/BLK WIRE TCC/BRAKE SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) THROTTLE POSITION SENSOR (ON THROTTLE BODY) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

2-3 SHIFT SOL CTRL FUEL INJ CTRL EGR SOL CTRL ENG SHUT-OFF CTRL 3-2 SHIFT SOL 2-3 SHIFT SOL 1-2 SHIFT SOL 8 9 10 PPL PPL 983 474 PPL 999 998 961 452 PPL ACCELERATOR PEDAL POSITION (APP) MODULE (TOP OF ACCELERATOR BRACKET) APP 1 SENSOR APP 2 SENSOR APP 3 SENSOR B/H BATTERY FEED BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BLK WIRE BRN WIRE BRN/WHT WIRE CKP SIG OPTICAL SENS GND OPTICAL SENS CAM SIG CRUISE CONTROL SYSTEM CRUISE ON/OFF SIG DATA LINK CONNECTOR (UNDER LEFT SIDE OF I/P) DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/BLK WIRE DK GRN/WHT WIRE ECMB FUSE ECT SIG TRANS FLUID TEMP SIG ELECTRONIC 4-SPEED AUTOMATIC OVERDRIVE TRANSMISSION ENGINE COOLANT TEMPERATURE (ECT) SENSOR (RIGHT SIDE OF ENGINE) ENGINE SHUT- OFF SOLENOID (TOP FRONT OF ENGINE) F/PMP FUSE FUEL INJ CTRL FUEL SOLENOID (TOP FRONT OF ENGINE) FUEL SOLENOID DRIVER (TOP FRONT FUSE PNK BLOCK WIRE GLOW PLUG RLY CTRL SERIAL DATA TRANS OUTPUT SPD SIG GRY WIRE GRY/BLK WIRE HI RESOLUTION SIG HOT AT ALL TIMES HOT IN START OR RUN LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE OF ENGINE) OPTICAL SENSOR AND FUEL TEMPER- ATURE SENSOR (TOP FRONT OF ENGINE) ORG/ WIRE ORG/BLK WIRE PNK WIRE PNK/WHT WIRE POWERTRAIN CONTROL MODULE (PCM) (UNDER RIGHT END OF I/P) PPL PRESS CTRL SOL PRESS CTRL SOL (LO) PRESSURE CONTROL SOL RANGE MODE SELECTOR RED WIRE RED/BLK WIRE RESUME/ACCEL SIG SET/COAST SIG SYSTEM GND CLOSURE GRD APP 2 SENS GND APP 1 SENS GND APP 3 SENS GND SENSOR GND SYSTEM GND FUEL INJ SIG APP SENS 2 SIG APP SENS 1 SIG TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC BRAKE SW TCC PWM SOL TCC SOL TRANS FLUID TEMP (TFT) SENSOR TRANS FUSE TRANS OUTPUT VEHICLE SPEED SENSOR (LEFT REAR SIDE OF TRANSMISSION) VEHICLE SPEED SENSOR BUFFER (UNDER RIGHT END OF I/P) VSS VSS INPUT VSS OUTPUT WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE