GMC Forward Control P3500 (1985-1999) gauges fuse Wiring diagrams

1-2 SHIFT SOL 1-2 SHIFT SOLENOID 2-3 SHIFT SOL 2-3 SHIFT SOLENOID A/T ISS HI IN A/T ISS LO IN AUTO TRANSMISSION INPUT SHAFT SPEED SENSOR (INSIDE FRONT OF TRANSMISSION) AUTOMATIC TRANSMISSION BATTERY IN BLK WIRE BLK/WHT WIRE BRAKE SWITCH INPUT BRN WIRE BRN/WHT WIRE DATA CLASS II DK BLU WIRE DK BLU/WHT WIRE ECM BATT FUSE ECM I FUSE ECT SENS INPUT ENG 1 FUSE ENGINE COOLANT TEMP SENSOR (TOP FRONT OF ENGINE) FUSE GAUGES FUSE GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START I/P FUSE BLOCK IGNITION IN INSTRUMENT CLUSTER LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MALFUNCTION INDICATOR LAMP MIL CONTROL ORG/ WIRE PCM GROUND PCS SOL HI OUT PCS SOL LO OUT PNK WIRE PPL PPL DATA LINK CONNECTOR PPL/WHT WIRE PRESS CTRL SOLENOID RANGE SIGNAL "A" RANGE SIGNAL "B" RANGE SIGNAL "C" RED WIRE RED/BLK WIRE SENSOR GROUND SENSOR RETURN TCC PWM SOL TCC PWM SOLENOID TCC/STOP- LAMP SWITCH (ON BRAKE PEDAL BRACKET) THROTTLE POSITION SENSOR (MOUNTED TO SIDE OF THROTTLE BODY) TP SENS INPUT TRANS FLUID TEMP SENSOR TRANS FUSE TRANS RANGE PRESSURE SWITCH ASSEMBLY TRANS TEMP SIG IN VEHICLE CONTROL MODULE (VCM) (BEHIND LEFT HEADLIGHT) VEHICLE SPEED SENSOR (LEFT REAR OF TRANSMISSION) VSS HI VSS LO YEL WIRE YEL/BLK WIRE

A/C COMPRESSOR CLUTCH DIODE A/C COMPRESSOR CLUTCH RELAY (ENGINE BULKHEAD RELAY BRACKET) A/C COMPRESSOR HIGH PRESSURE CUTOFF SWITCH (REAR OF COMPRESSOR) A/C COMPRESSOR REFRIGERANT PRESSURE SWITCH (REAR OF COMPRESSOR) A/C ENABLE AUXILIARY ENGINE COOLANT FAN AUXILIARY ENGINE COOLANT FAN A/C PRESSURE SWITCH (IN A/C HIGH PRESSURE LINE) AUXILIARY ENGINE COOLANT FAN RELAY (ENGINE BULKHEAD RELAY BRACKET) AUXILIARY FAN CONTROL SWITCH (ON RIGHT SIDE OF CYLINDER HEAD) BLK WIRE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENG 1 FUSE ENG-BAT FUSE FUSIBLE LINK GAUGES FUSE GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START I/P FUSE BOX ORG/ WIRE PNK WIRE RED WIRE VIN J VIN F WHT WIRE

BAT BAT (BASE) GENERATOR BATTERY BLK WIRE FUSIBLE LINK FUSIBLE LINK (10 GA-RUST) GASOLINE DIESEL GAUGES FUSE HOT IN RUN AND START I/P FUSE BLOCK INSTRUMENT CLUSTER TACH (DIESEL) PNK (COMMERCIAL) (MOTOR HOME) PNK WIRE PNK WIRE POWER DISTRIBUTION SYSTEM RED (OR GRY) WIRE RED WIRE SECONDARY BATTERY (DIESEL) STARTER SOLENOID WHT WIRE

1996 VFTC ACCY BLK WIRE BLK/WHT WIRE BULB TEST DAYTIME RUNNING LAMPS (DRL) MODULE (ATTACHED TO I/P HARNESS AT STEERING COLUMN) DAYTIME RUNNING LAMPS (DRL) RELAY (ON MAIN SUPPORT BRACKET AT DRIVER'S ISLAND) DAYTIME RUNNING LAMPS (DRL) RELAY 2 DIODE NETWORK DK BLU WIRE DK GRN/WHT WIRE DRL INDICATOR GAUGES FUSE GRN WIRE HEAD- LAMP DIMMER SWITCH HEADLAMPS SWITCH HI BEAM INDICATOR HI LO HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK IGNITION SWITCH INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM LEFT HEAD- LAMP LEFT HI BEAM HEAD- LAMP LO HI LOCK OFF LT GRN WIRE LT GRN/BLK WIRE NEAR BREAKOUT FOR CHASSIS HARNESS) ORG/ WIRE PARK BRAKE IN FOG LAMPS PARK BRAKE INDICATOR SWITCH (ON PARK BRAKE) PARK HEAD OFF PNK IGNITION LAMP FEED HI BM FEED HI BM INDICATOR DRL RELAY CTRL GROUND WIRE PNK WIRE RIGHT HEAD- LAMP RIGHT HI BEAM HEAD- LAMP RUN WIRE TAN WIRE TAN/WHT WIRE WHT WIRE YEL WIRE

1996 VFTC ACCY BLK WIRE BLK/WHT WIRE BULB TEST DAYTIME RUNNING LAMPS (DRL) MODULE (ATTACHED TO I/P HARNESS AT STEERING COLUMN) DAYTIME RUNNING LAMPS (DRL) RELAY (ON MAIN SUPPORT BRACKET AT DRIVER'S ISLAND) DIODE NETWORK DK BLU WIRE DK GRN/WHT WIRE DRL INDICATOR GAUGES FUSE GRN WIRE HEAD- LAMP DIMMER SWITCH HEADLAMPS SWITCH HI LO HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK IGNITION SWITCH INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM HI BEAM INDICATOR LEFT HEAD- LAMP LO HI LOCK OFF LT GRN WIRE LT GRN/BLK WIRE NEAR BREAKOUT FOR CHASSIS HARNESS) ORG/ WIRE PARK BRAKE IN FOG LAMPS PARK BRAKE INDICATOR SWITCH (ON PARK BRAKE) PARK HEAD OFF PNK IGNITION LAMP FEED HI BM FEED HI BM INDICATOR DRL RELAY CTRL GROUND WIRE PNK WIRE RIGHT HEAD- LAMP RUN WIRE TAN WIRE TAN/WHT WIRE WHT WIRE YEL WIRE

1996 VFTC 6.5L VIN Y A/C COMPRESSOR CLUTCH RELAY AUTOMATIC TRANSMISSION AUX FUSE BACK UP LAMPS SWITCH BRN WIRE CANADIAN MODELS ONLY CAVITY A) DAYTIME RUNNING LAMP (DRL) RELAY DAYTIME RUNNING LAMPS (DRL) CONTROL MODULE DIESEL ECM 1 FUSE FROM IGNITION SWITCH FUEL INJECTION PUMP FUEL SHUT-OFF SOLENOID GAS GAS MODELS ONLY GAUGES FUSE GENERATOR GENERATOR HOT IN RUN, START HTR BUS HTR FUSE I-3 FUSE I/P FUSE BLOCK (DASH PANEL PROVIDED BY BODY BUILDER) (BODY BUILDER INSTALLED) IGN BUS INSTRUMENT CLUSTER MANUAL TRANSMISSION ORG/ WIRE P/B BOOSTER FLUID FLOW, PRESSURE ALARM PARK/ NEUTRAL POSITION (PNP), BACKUP LAMPS SWITCH PNK PNK WIRE PNK WIRE SEAT BELT ALARM INSTRUMENT CLUSTER THIS CAN PLUG INTO TORQUE CONVERTER CLUTCH (TCC), STOP LAMPS SWITCH TRANSMISSION CONTROL MODULE (TCM) FUEL INJECTION PUMP FUEL SHUT-OFF SOLENOID TURN SIGNAL FLASHER TURN-B/U FUSE VEHICLE CONTROL MODULE (VCM) VEHICLE SPEED SENSOR (VSS) BUFFER W/BRAKE WARNING INDICATOR SYSTEM

1996 VFTC 6.5L VIN F PNK ONLY WIRE 7.4L VIN J (L29), 6.5L VIN F (L65) ENGINES 7.4L VIN J, 6.5L VIN F (L65) ENGINES ONLY PNK WIRE 7.4L VIN N A/C COMPRESSOR CONTROL RELAY AUTO APPLY PARK BRAKE SWITCH AUX CIRCUIT BREAKER BACKUP LAMP SWITCH BRN WIRE BUSS BAR CANADIAN MODELS CAVITY A) CRUISE CONTROL MODULE DAYTIME RUNNING LAMPS MODULE DAYTIME RUNNING LAMPS RELAY ENGINE FROM IGNITION SWITCH GAUGES FUSE GENERATOR HOT IN RUN, START HTR FUSE I-3 FUSE I/P AUXILIARY FUSE BLOCK (MOUNTED ON THE I/P FUSE BLOCK) AUTO APPLY FUSE I/P FUSE BLOCK (MOUNTED ON THE I/P) INSTRUMENT CLUSTER NCA WIRE ORG/ WIRE PARK BRAKE LOW PRESSURE SWITCH PARK/NEUTRAL POSITION (PNP), BACKUP LAMP SWITCH PNK PNK WIRE PNK WIRE PPL SEATBELTS/ LAMPS ALARM MODULE SPEED CONTROL SWITCH TORQUE CONVERTER CLUTCH, STOPLAMPS SWITCH TURBO CHARGER POWER VALVE SOLENOID TURN SIGNAL FLASHER TURN SIGNAL SWITCH TURN-B/U FUSE VEHICLE CONTROL MODULE (VCM)

1-2 SHIFT SOLENOID 2-3 SHIFT SOLENOID 8 9 PNK WIRE AUTOMATIC TRANSMISSION (A/T) (REAR OF ENGINE) BATTERY JUNCTION BLOCK (LEFT SIDE OF ENGINE BULKHEAD, ABOVE RELAY BRACKET) BLK WIRE BLU WIRE BRN WIRE CLOSED IN PARK, NEUTRAL CRK (START) DK BLU WIRE DK GRN WIRE ECM 1 FUSE FUEL INJECTION PUMP FUEL SHUT-OFF SOLENOID (AT FUEL INJECTION PUMP) FUSIBLE LINK (16 GA- GAUGES FUSE GLOW PLUGS GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN (ON) RUN, START (CRANK) I/P FUSE BLOCK (DASH PANEL PROVIDED BY BODY BUILDER) (BODY BUILDER INSTALLED) IGNITION SWITCH INSTRUMENT CLUSTER LOCK ON (RUN) OFF LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE PNK PNK PNK WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL PPL PPL PNK 3 4 5 6 7 8 WIRE PPL STUD PRESSURE CONTROL SOLENOID RED WIRE RED/BLK WIRE SPEEDO- METER STARTER RELAY (ENGINE BULKHEAD RELAY BRACKET UNDER BATTERY JUNCTION BLOCK) STARTER SOLENOID (STARTER AT LOWER RIGHT SIDE OF ENGINE) STUD TCC PWM SOLENOID TRANS.) TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR TRANSMISSION RANGE (TR) PRESSURE SWITCH ASSEMBLY WATER IN FUEL WHT WIRE YEL WIRE YEL/BLK WIRE

BATTERY JUNCTION BLOCK (LEFT SIDE OF ENGINE BULKHEAD, ABOVE RELAY BRACKET) BLK WIRE BULKHEAD GROMMET) CRK (START) DK BLU WIRE FROM GENERATOR B+ BREAKOUT) FUEL INJECTION PUMP COLD ADVANCE SOLENOID (IN FUEL INJECTION PUMP) FUSIBLE LINK (16 GA- GAUGES FUSE GLOW PLUGS HOT AT ALL TIMES HOT IN (ON) RUN, START (CRANK) I/P FUSE BLOCK (DASH PANEL PROVIDED BY BODY BUILDER) (BODY BUILDER INSTALLED) IGNITION SWITCH INSTRUMENT CLUSTER LOCK ON (RUN) OFF LT GRN/BLK WIRE NCA WIRE PNK IGN FEED IND LAMP OUT GROUND WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL PPL STUD RED WIRE STARTER RELAY (ENGINE BULKHEAD RELAY BRACKET UNDER BATTERY JUNCTION BLOCK) STARTER SOLENOID (STARTER AT LOWER RIGHT SIDE OF ENGINE) STUD WATER IN FUEL WHT WIRE YEL WIRE YEL/BLK WIRE

BATTERY JUNCTION BLOCK (ON FORWARD LEFT SIDE OF BULKHEAD) BLK WIRE BLK/RED WIRE BRN WIRE BRN/WHT WIRE BYPASS DIST. REF HI DIST. REF LO DISTRIBUTOR DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM 1 FUSE FUEL GAUGE FUEL PUMP PRIME CONNECTOR FUEL PUMP RELAY (AT RELAY CENTER RIGHT SIDE OF MAIN SUPPORT AT DRIVER'S ISLAND) FUEL PUMP, SENDER (ON TOP OF FUEL TANK) FUSIBLE LINK (16 GA- GAUGES FUSE GRY WIRE HIGH VOLTAGE IGNITION COIL WIRE HOT AT ALL TIMES HOT IN RUN, START (CRANK) I/P FUSE BLOCK (MOUNTED ON THE I/P) IGNITION COIL (ON BRACKET AT REAR OF INTAKE PLENUM) IGNITION MODULE IGNITION SWITCH INSTRUMENT CLUSTER LOCK OFF OIL PRESS GAUGE ORG/ WIRE PICKUP COIL PNK 9 10 11 12 13 14 15 16 WIRE PNK PNK 1 2 3 4 5 WIRE PNK WIRE PPL PPL/WHT WIRE RED WIRE RUN WIRE SERVICE ENGINE SOON INDICATOR SPEED METER TACHOMETER TEST LEAD TAN WIRE TAN/BLK WIRE THROTTLE BODY FUEL INJECTOR NO.1 (ON TOP OF INTAKE MANIFOLD) THROTTLE BODY FUEL INJECTOR NO.2 (ON TOP OF INTAKE MANIFOLD) WHT WIRE