GMC Forward Control P3500 (1985-1999) purge vent Wiring diagrams

14 15 16 PPL PPL 2-3 SHIFT SOL CTRL ANTI-LOCK BRAKE SYSTEM BLK WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE CAM POSIT SENS RTN FUEL LEV SIGNAL PPL CAM POSIT SENS SIG CAMSHAFT POSITION (CMP) SENSOR (INTERNAL TO DISTRIBUTOR) DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/ WHT WIRE DK GRN/WHT WIRE FUEL TANK PRESSURE SENSOR (AT FUEL TANK) GRY WIRE HALL EFFECT SENSOR HALL EFFECT SENSOR PNK WIRE IDLE AIR CONTROL (IAC) VALVE KNOCK SENS SIG KNOCK SENSOR (KS) (LOWER RIGHT SIDE OF ENGINE) LT BLU/ BLK WIRE LT BLU/ WHT WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WHT/ WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MAP SENSOR IN IAT SENS SIG ECT SENSOR IN THROTTLE POSIT SENS TANK PRESSURE NCA WIRE PNK PNK 1 2 WIRE PNK PNK 30 31 WIRE PNK WIRE PNK/BLK WIRE PPL PPL CKP SENS RTN VSS RTN VSS SIG PPL PPL PPL/WHT WIRE PURGE VENT RED/BLK WIRE TAN WIRE TAN/ WHT WIRE TAN/WHT WIRE VEHICLE SPEED OUT VEHICLE SPEED SENSOR (VSS) (LEFT SIDE OF TRANSMISSION) WHT PPL/ WIRE WHT WIRE YEL WIRE YEL/BLK WIRE

15 16 17 PPL PPL 2-3 SHIFT SOL CTRL ANTI-LOCK BRAKE SYSTEM BLK LT BLU/ WIRE BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CAM POSIT SENS RTN FUEL LEV SIGNAL PPL CAM POSIT SENS SIG POWER PNK WIRE CAMSHAFT POSITION (CMP) SENSOR (IN DISTRIBUTOR) DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE GRY WIRE HALL EFFECT SENSOR HALL EFFECT SENSOR PNK WIRE IDLE AIR CONTROL (IAC) VALVE KNOCK SENS SIG KNOCK SENSOR (KS) (LOWER RIGHT SIDE OF ENGINE) LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/ BLK WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MAP SENSOR IN IAT SENS SIG ECT SENSOR IN THROTTLE POSIT SENS TANK PRESSURE NCA WIRE PNK PNK 30 31 WIRE PNK PNK PNK 1 2 3 WIRE PNK WIRE PNK/BLK WIRE PPL PPL CKP SENS RTN VSS RTN VSS SIG PPL PPL PPL/ WHT WIRE PPL/WHT WIRE PURGE VENT RED/BLK WIRE TAN WIRE TAN/WHT WIRE TANK PRESSURE SENSOR (TOP OF FUEL TANK) VEHICLE CONTROL MODULE (VCM) (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED OUT VEHICLE SPEED SENSOR (VSS) (LEFT REAR OF TRANSMISSION, NEAR CENTER) WHT DK GRN/ WIRE WHT LT BLU/ WIRE WHT LT GRN/ WIRE WHT TAN/ WIRE WHT WIRE YEL WIRE YEL/BLK WIRE