Wiring diagram engine performance 4.3l vin ws for GMC Forward Control P3500 (1985-1999)

2-3 SHIFT SOL CTRL ANTI-LOCK BRAKE SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CAM POSIT SENS RTN FUEL LEV PPL CAMSHAFT POSITION (CMP) SENSOR (INTERNAL TO DISTRIBUTOR) CKP DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GRY WIRE HALL EFFECT SENSOR IGN FEED KNOCK SENS SIG KNOCK SENSOR (KS) (TOP CENTER REAR OF ENGINE) LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE NCA WIRE PNK PNK PNK 2 3 4 WIRE PNK WIRE PNK/BLK WIRE PPL PPL CKP SENS RTN VSS RTN VSS SIG PPL/WHT WIRE PURGE VENT CTRL RETURN SENSOR CKP SENSOR SIGNAL TAN WIRE TAN/WHT WIRE TANK PRESSURE SENSOR (TOP OF FUEL TANK) VEHICLE SPEED OUT VEHICLE SPEED SENSOR (VSS) (LEFT SIDE OF TRANSMISSION) WHL SPD SIG, LEFT FRT CAM POSIT SENS SIG WHT DK GRN/ WIRE WHT LT BLU/ WIRE WHT LT GRN/ WIRE WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOLENOID 2-3 SHIFT SOLENOID AUTOMATIC TRANSMISSION (A/T) (IF EQUIPPED) (REAR OF ENGINE) BLK WIRE BLK/WHT WIRE BRN WIRE DK BLU WIRE DK GRN/WHT WIRE ECM 1 FUSE 12 ENG 1 FUSE 15 FUEL INJECTOR NO.2 FUEL INJECTOR NO.1 FUEL INJECTOR NO.3 FUEL INJECTOR NO.4 FUEL INJECTOR NO.5 FUEL INJECTOR NO.6 GRY WIRE HOT IN RUN, START I/P FUSE BLOCK (BEHIND DASH PANEL) (BODY BUILDER INSTALLED) LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE PNK PNK PNK 2 3 4 5 WIRE PNK PNK PNK 2 3 4 WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL/WHT WIRE PRESSURE CONTROL SOLENOID (PCS) RED WIRE RED/BLK WIRE REV TAN WIRE TAN/WHT WIRE TCC PWM SOLENOID TRANS FUSE 17 TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR TRANSMISSION RANGE (TR) PRESSURE SWITCH ASSEMBLY WHT WIRE YEL WIRE YEL/BLK WIRE

3 4 5 PNK PNK WIRE A/C COMPRESSOR HIGH PRESSURE CUT-OFF SWITCH (REAR OF A/C COMPRESSOR) BLK WIRE BREAKOUT) BRN WIRE BRN/WHT WIRE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENG BAT FUSE 10 ENGINE COOLANT TEMPERATURE (ECT) SENSOR (TOP FRONT OF ENGINE) FROM ECT SENSOR BREAKOUT) FUEL GAUGE FUEL SENDER, FUEL PUMP (TOP OF FUEL TANK) GAUGES FUSE 8 GRY WIRE HOT AT ALL TIMES HOT IN RUN, START I/P FUSE BLOCK (BEHIND DASH PANEL) (BODY BUILDER INSTALLED) INSTRUMENT CLUSTER LT BLU/WHT WIRE LT GRN WIRE MALFUNCTION INDICATOR LAMP MAP REF LO MASS AIR FLOW SENSOR (MAF) (MOUNTED IN FRESH AIR INTAKE, BEHIND AIR FILTER BOX) NCA WIRE ORG/ WIRE PNK 6 7 8 9 10 11 12 13 14 15 WIRE PNK PNK PNK 2 3 4 5 WIRE PNK PNK WIRE PNK WIRE PPL RED WIRE RED/BLK WIRE REF LO REF THROTTLE POSITION (TP) SENSOR (ON THROTTLE BODY, TOP OF ENGINE) SENSOR BREAKOUT) SPEEDO- METER TACHO- METER TAN WIRE TEMP WHT WIRE YEL WIRE

3 4 5 PNK PNK WIRE 389 419 VSS OUTPUT MIL CTRL 420 1807 PPL PPL BRAKE SIG SERIAL DATA 440 1225 1224 IGN FEED RANGE SIG "B" RANGE SIG "A" A/C REQUEST SIG A/C SYSTEM BLK WIRE BLK/WHT WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE BULKHEAD GROMMET TOWARD IGNITION SW) CYLINDER 2 CYLINDER 1 CYLINDER 5 CYLINDER 3 CYLINDER 4 CYLINDER 6 DISTRIBUTOR (TOP REAR OF ENGINE) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM-BAT FUSE 6 EGR VALVE CTRL ELECTRONIC BRAKE CONTROL MODULE FEED FUEL PUMP PRIME CONNECTOR (TAPED TO FUEL PUMP RELAY BREAKOUT) GROUND GRY WIRE HIGH VOLTAGE COIL WIRE HOT AT ALL TIMES HOT IN RUN I-3 FUSE 9 I/P FUSE BLOCK (BEHIND DASH PANEL) (BODY BUILDER INSTALLED) IGN FEED IGNITION IGNITION COIL (TOP RIGHT SIDE OF ENGINE) IGNITION CONTROL MODULE (RIGHT TOP OF ENGINE, AT IGNITION COIL) LT BLU/WHT WIRE ORG/ WIRE PCS SOL (HI) INPUT SPD SENS SIG INPUT SPD SENS RTN TIMING CTRL SIG PCS SOL (LO) VCM GROUND VCM GROUND GROUND 451 451 470 PNK 6 7 8 9 10 11 12 13 14 15 WIRE PNK IGN FEED WIRE PNK WIRE PPL PPL (ENGINE HARN, 18 CM FROM BREAKOUT TO BULKHEAD CONN) PPL FUEL LEVEL PRESSURE SWITCH IN RANGE SIG "C" RED WIRE RED/ BLK WIRE RED/BLK WIRE SHIFT INTERLOCK SYSTEM PPL SPARK PLUGS TIMING CONTROL RETURN TIMING CONTROL SIGNAL) TORQUE CONVERTER CLUTCH, STOP LAMP SWITCH (AT BRAKE PEDAL SUPPPORT) TRANSMISSION INPUT SPEED SENSOR (ON LEFT SIDE OF TRNASMISSION, NEAR THE MIDDLE) WHT WIRE WHT/ BLU WIRE WHT/BLK WIRE