GMC Forward Control P3500 (1985-1999) signal control timing Wiring diagrams

3 4 5 6 7 8 9 10 11 12 13 14 15 16 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 A/T INPUT SPEED SENSOR (TRANSMISSION, LEFT FRONT) ANTI-LOCK BRAKES SYSTEM BLK RED/ WIRE BLK WIRE BLK/WHT WIRE BLU/ WHT WIRE BRN WIRE BRN/WHT WIRE BULKHEAD GROMMET TOWARD IGNITION SW) CLUTCH PEDAL POSITION SWITCH (LEFT SIDE OF BRAKE PEDAL BRACKET) CLUTCH SIG CYLINDER NO.2 CYLINDER NO.1 CYLINDER NO.5 CYLINDER NO.3 CYLINDER NO.4 CYLINDER NO.6 DISTRIBUTOR (TOP REAR OF ENGINE) DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECM B FUSE 6 EGR VALVE CTRL FEED IGNITION FUEL PUMP PRIME CONNECTOR (TAPED TO FUEL PUMP RELAY BREAKOUT) FUEL PUMP RELAY (ON FIRE- WALL, UNDER BATTERY JUNCTION BLOCK) GROUND GRY WIRE HIGH VOLTAGE COIL WIRE HOT AT ALL TIMES HOT IN RUN I-3 FUSE 9 I/P FUSE BLOCK (DASH PANEL PROVIDED BY BODY BUILDER) (BODY BUILDER INSTALLED) IGN FEED IGNITION COIL (TOP RIGHT SIDE OF ENGINE) IGNITION CONTROL MODULE (RIGHT TOP OF ENGINE) LT BLU/WHT WIRE ORG/ WIRE PCS SOL (HI) INPUT SPD SENS SIG INPUT SPD SENS RTN TIMING CTRL SIG PCS SOL (LO) SYSTEM GROUND SYSTEM GROUND GROUND 451 451 470 PNK IGN FEED WIRE PNK WIRE PPL PPL FUEL LEVEL PRESSURE SWITCH IN RANGE SIG "C" RED WIRE RED/BLK WIRE RETURN CONTROL TIMING SHIFT INTERLOCK SYSTEM PPL SIGNAL CONTROL TIMING SPARK PLUGS TCC/STOP LAMPS SWITCH (RIGHT SIDE OF STEERING COLUMN UPPER SUPPORT) VEHICLE CONTROL MODULE (VCM) (LEFT SIDE OF ENGINE COMPARTMENT) WHT WIRE WHT/BLK WIRE

389 419 VSS OUTPUT MIL CTRL 440 1225 1224 IGN FEED RANGE SIG "B" RANGE SIG "A" 5 6 7 8 9 PNK PNK WIRE A/C REQUEST SIG A/C SW IN A/C SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CLUTCH PEDAL POSITION SWITCH (TOP OF CLUTCH PEDAL SUPPORT) CLUTCH SIG CYLINDER 1 CYLINDER 4 CYLINDER 5 CYLINDER 3 CYLINDER 6 CYLINDER 7 CYLINDER 2 CYLINDER 8 DISTRIBUTOR (TOP REAR OF ENGINE) DK BLU WIRE DK BLU/ WHT WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECM-BAT FUSE 6 EGR CTRL ELECTRONIC BRAKE CONTROL MODULE FEED IGNITION 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 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 GND VCM GND GND 451 451 470 PNK IGN FEED WIRE PNK WIRE PPL PPL 1 2 PPL 2 4 5 16 DATA LINK CONNECTOR (DLC) (BELOW DASH, NEAR STEERING COLUMN) PPL ANTI-LOCK BRAKE SYSTEM PPL FUEL LEV PPL PPL 420 1807 BRAKE SIG SERIAL DATA RANGE SIG "C" RED WIRE RED/ BLK WIRE RED/BLK WIRE RETURN CONTROL TIMING SIGNAL CONTROL TIMING SPARK PLUGS TORQUE CONVERTER CLUTCH, STOP LAMP SWITCH (AT BRAKE PEDAL SUPPORT) TRANSMISSION INPUT SPEED SENSOR (LEFT SIDE OF TRANSMISSION, NEAR THE MIDDLE) WHT WIRE WHT/BLK WIRE