GMC Forward Control P3500 (1985-1999) org/ Wiring diagrams

1-3 FUSE 9 A/T ISS HIGH A/T ISS LOW AUTOMATIC TRANSMISSION SHAFT SPEED SENSOR (A/T ISS) (LEFT SIDE OF TRANSMISSION) BLK WIRE BLK/WHT WIRE BLU/WHT WIRE BRN WIRE CRUISE CONTROL MODULE (ON LEFT RADIATOR SUPPORT BRACKET) CRUISE CONTROL SWITCH CRUISE ENGAGED IN VSS INPUT DK BLU WIRE DK GRN/WHT WIRE GRY WIRE GRY/BLK WIRE HAZARD LAMPS FLASHER (LEFT OF STEERING COLUMN) HOT AT ALL TIMES HOT IN RUN I/P FUSE BLOCK LT BLU WIRE LT BLU/BLK WIRE NCA WIRE OFF ORG/ WIRE PPL R/A RED/BLK WIRE RESISTOR (ENGINE HARNESS, 7 CM FROM BREAKOUT TO ENGINE COOLANT FAN MOTOR CONN) S/C STOP/HAZ FUSE 1 STOPLAMPS SWITCH (ABOVE BRAKE PEDAL) TORQUE CONVERTER CLUTCH, STOPLAMPS SWITCH (ABOVE BRAKE PEDAL) VEHICLE CONTROL MODULE (VCM) (ON LEFT RADIATOR SUPPORT BRACKET) VSS OUTPUT CRUISE ENGAGED

A/C COMPRESSOR ENABLE RLY CTRL A/C COMPRESSOR, CLUTCH (LEFT SIDE OF ENGINE) A/C LOW PRESSURE SWITCH SIGNAL A/C REQUEST SIGNAL BLK WIRE BLU WIRE DK GRN WIRE ENG BAT FUSE 10 GAUGES FUSE 8 GRN WIRE HOT AT ALL TIMES HOT IN RUN, START I/P FUSE BLOCK (BODY BUILDER INSTALLED) (BEHIND DASH PANEL) NCA WIRE ORG/ WIRE PNK WIRE PROVISIONS FOR BODY BUILDER HVAC WHT WIRE

1-3 FUSE 9 A/T ISS HIGH A/T ISS LOW AUTOMATIC TRANSMISSION SHAFT SPEED SENSOR (A/T ISS) (LEFT SIDE OF TRANSMISSION) BLK WIRE BLK/WHT WIRE BLU/WHT WIRE BRN WIRE CRUISE CONTROL MODULE (ON LEFT RADIATOR SUPPORT BRACKET) CRUISE CONTROL SWITCH CRUISE ENGAGED IN VSS INPUT DK BLU WIRE DK GRN/WHT WIRE GRY WIRE GRY/BLK WIRE HAZARD LAMPS FLASHER (LEFT OF STEERING COLUMN) HOT AT ALL TIMES HOT IN RUN I/P FUSE BLOCK LT BLU WIRE LT BLU/BLK WIRE NCA WIRE OFF ORG/ WIRE PPL R/A RED/BLK WIRE RESISTOR (ENGINE HARNESS, 7 CM FROM BREAKOUT TO ENGINE COOLANT FAN MOTOR CONN) S/C STOP/HAZ FUSE 1 STOPLAMPS SWITCH (ABOVE BRAKE PEDAL) TORQUE CONVERTER CLUTCH, STOPLAMPS SWITCH (ABOVE BRAKE PEDAL) VEHICLE CONTROL MODULE (VCM) (ON LEFT RADIATOR SUPPORT BRACKET) VSS OUTPUT CRUISE ENGAGED

A/C COMPRESSOR ENABLE RLY CTRL A/C COMPRESSOR, CLUTCH (LEFT SIDE OF ENGINE) A/C LOW PRESSURE SWITCH SIGNAL A/C REQUEST SIGNAL BLK WIRE BLU WIRE DK GRN WIRE ENG BAT FUSE 10 GAUGES FUSE 8 GRN WIRE HOT AT ALL TIMES HOT IN RUN, START I/P FUSE BLOCK (BODY BUILDER INSTALLED) (BEHIND DASH PANEL) NCA WIRE ORG/ WIRE PNK WIRE PROVISIONS FOR BODY BUILDER HVAC WHT WIRE

1-3 FUSE 9 A/T ISS HIGH A/T ISS LOW AUTOMATIC TRANSMISSION SHAFT SPEED SENSOR (A/T ISS) (LEFT SIDE OF TRANSMISSION) BLU/WHT WIRE BRN WIRE CRUISE CONTROL SWITCH DK BLU WIRE GRY WIRE GRY/BLK WIRE HAZARD LAMPS FLASHER (LEFT OF STEERING COLUMN) HOT AT ALL TIMES HOT IN RUN I/P FUSE BLOCK LT BLU WIRE NCA WIRE OFF ORG/ WIRE POWERTRAIN CONTROL MODULE (PCM) (ON LEFT SIDE OF DRIVER'S ISLAND) PPL PPL TCC/STOP SW SIG STOPLAMP SW SIGNAL CRUISE ON/OFF INPUT SET/COAST INPUT R/A RED/BLK WIRE RESUME/ACCEL INPUT S/C STOP/HAZ FUSE 1 STOPLAMPS SWITCH (ABOVE BRAKE PEDAL) TORQUE CONVERTER CLUTCH, STOPLAMPS SWITCH (ABOVE BRAKE PEDAL)

A/C COMPRESSOR CLUTCH DIODE A/C COMPRESSOR CLUTCH A/C COMPRESSOR HIGH PRESSURE CUT-OFF SWITCH (ON REAR OF A/C COMPRESSOR) A/C COMPRESSOR RELAY CTRL A/C REQUEST SIGNAL BLK WIRE DK GRN WIRE DK GRN/WHT (OR NCA) WIRE DK GRN/WHT WIRE ENG BAT FUSE 10 GAUGES FUSE 8 GRY WIRE HOT AT ALL TIMES HOT IN RUN, START I/P FUSE BLOCK (BODY BUILDER INSTALLED) (BEHIND DASH PANEL) LT BLU WIRE NCA WIRE ORG/ WIRE PNK WIRE PROVISION FOR BODY BUILDER BLUNT CUT WHT WIRE

A/C COMPRESSOR CLUTCH DIODE A/C COMPRESSOR CLUTCH A/C COMPRESSOR HIGH PRESSURE CUT-OFF SWITCH (ON REAR OF A/C COMPRESSOR) A/C COMPRESSOR RELAY (ON RIGHT SIDE OF DRIVER'S ISLAND) A/C COMPRESSOR RELAY CTRL A/C REQUEST SIGNAL BLK WIRE DK GRN WIRE DK GRN/WHT (OR NCA) WIRE DK GRN/WHT WIRE ENG BAT FUSE 10 GAUGES FUSE 8 GRY WIRE HOT AT ALL TIMES HOT IN RUN, START I/P FUSE BLOCK (BODY BUILDER INSTALLED) (BEHIND DASH PANEL) LT BLU WIRE NCA WIRE ORG/ WIRE PNK WIRE PROVISION FOR BODY BUILDER BLUNT CUT WHT WIRE

A/C COMPRESSOR CLUTCH A/C COMPRESSOR CLUTCH DIODE BLK WIRE DK GRN WIRE DK GRN/WHT WIRE ENG BAT FUSE 10 GRY WIRE HOT AT ALL TIMES I/P FUSE BLOCK (BODY BUILDER INSTALLED) (BEHIND DASH PANEL) LT BLU WIRE NCA WIRE ORG/ WIRE PROVISION FOR BODY BUILDER BLUNT CUT WHT WIRE

1-2 SHIFT SOL 1223 1222 2-3 SHIFT SOL CTRL 1-2 SHIFT SOL CTRL DIAGNOSTIC TEST 1227 433 TRANS FLUID TEMP SIG BARO SENSOR INPUT 9 6 DATA LINK CONNECTOR (PARTIAL) (BELOW DASH, NEAR STEERING COLUMN) A/T INPUT SPEED SENSOR (LEFT FRONT SIDE OF TRANSMISSION) AUTOMATIC TRANSMISSION BAROMETRIC PRESSURE SENSOR (TOP LEFT REAR OF INTAKE MANIFOLD) BATTERY FEED BLK WIRE BLK/WHT WIRE BRN WIRE DK BLU WIRE DK BLU/WHT WIRE DRL MODULE, DRL RELAY, GENERATOR ECM 1 FUSE 12 ECM-BAT FUSE 6 ELECTRONIC BRAKE CONTROL MODULE ENGINE OIL PRESSURE INDICATOR SENSOR, FUEL PUMP RELAY ENGINE SPEED SENSOR (IN FUEL INJECTION PUMP) ENGINE SPEED SIGNAL SENSOR GROUND TP SENSOR INPUT FUEL INJECTION PUMP SHUTOFF SOLENOID,, FUEL PUMP RELAY GAUGES FUSE 8 GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN HOT IN RUN OR START I-3 FUSE 9 I/P FUSE BLOCK IGN BUSS INSTRUMENT CLUSTER LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE OUT PCS HI PCS LO IGNITION PNK WIRE PNK RANGE SIGNAL A RANGE SIGNAL B RANGE SIGNAL C WIRE PNK WIRE PPL PPL BRAKE SIGNAL TCC PWM CONTROL PPL/WHT WIRE PRESSURE CONTROL SOLENOID RANGE MODE SELECTOR RED WIRE RED/BLK WIRE RUN WIRE SERVICE TRANS OUTPUT SERIAL DATA SERVICE TRANSMISSION INDICATOR STOP LAMPS, TORQUE CONVERTER BRAKE SWITCH SYSTEM GROUND SYSTEM GROUND 452 416 SENSOR GROUND 5 VOLTS REF TAN WIRE TCC PWM SOL 2-3 SHIFT SOL THROTTLE POSITION SENSOR (ON FUEL INJECTION PUMP) TRANS FUSE 17 TRANSMISSION CONTROL MODULE (LEFT INTERIOR FIREWALL) TRANSMISSION TEMPERATURE SENSOR VEHICLE SPEED INPUT INPUT SPEED SENS LO INPUT SPEED SENS HI VEHICLE SPEED SENSOR (LEFT REAR OF TRANSMISSION) VEHICLE SPEED SENSOR BUFFER VEHICLE SPD OUTPUT VSS INPUTS WHT WIRE WHT/BLK WIRE YEL/BLK WIRE

A/C COMPRESSOR CLUTCH A/C COMPRESSOR ENABLE RLY CTRL A/C COMPRESSOR HIGH PRESSURE CUT-OFF SWITCH (ON REAR OF A/C COMPRESSOR) A/C COMPRESSOR RELAY (ON RIGHT SIDE OF DRIVER'S ISLAND) A/C REQUEST SIGNAL BLK WIRE BLU WIRE DIODE DK GRN WIRE ENG BAT FUSE 10 GAUGES FUSE 8 HOT AT ALL TIMES HOT IN RUN, START I/P FUSE BLOCK (BODY BUILDER INSTALLED) (BEHIND DASH PANEL) LOW PRESSURE CUTOUT SIGNAL NCA WIRE ORG/ WIRE PNK WIRE VEHICLE CONTROL MODULE (VCM) (ON TOP OF RADIATOR SUPPORT) WHT WIRE