GMC Rally G3500 (1985-1996) inline diode Wiring diagrams

ABS IND. ABS MAXI FUSE 4 BLK WIRE BLK/ WHT WIRE BLK/WHT WIRE BRAKE FUSE 18 BRAKE IND BRAKE PRESSURE WARNING SWITCH BRAKE SW OUTPUT BRAKE/ BRN WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (LEFT FRONT SIDE OF FRAME) HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN OR START GAUGES FUSE 4 I/P FUSE BLOCK IGN ABS LAMP CONTROL BRAKE SW INPUT INLINE DIODE INSTRUMENT CLUSTER LEFT FRONT WHEEL SPEED SENSOR LFT FRT SENSOR (-) LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE PARK BRAKE WARNING SWITCH PNK WIRE PPL PPL/WHT WIRE PUMP MOTOR POWER PUMP MOTOR GROUND RED WIRE RIGHT FRONT WHEEL SPEED SENSOR RT FRT SENSOR (-) LFT FRT SENSOR (+) RT FRT SENSOR (+) TAN WIRE TAN/WHT WIRE TCC/ STOPLAMP SWITCH (ABOVE BRAKE PEDAL) UNDERHOOD FUSE-RELAY CENTER VEHICLE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (LEFT SIDE OF TRANSMISSION) VEHICLE SPEED SIG VSS VSS SIG SERIAL DATA LINE SERIAL DATA SIGNAL BRAKE LAMP CONTROL EBCM GROUND W/O DRL W/DRL WHT TAN/ WIRE WHT WIRE YEL WIRE

ABS IND. ABS MAXI FUSE 4 BLK WIRE BLK/WHT WIRE BRAKE FUSE 18 BRAKE IND BRAKE PRESSURE WARNING SWITCH BRAKE/ BRN WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (LEFT FRONT SIDE OF FRAME) HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN OR START GAUGES FUSE 4 I/P FUSE BLOCK IGN ABS LAMP CONTROL BRAKE SW INPUT INLINE DIODE INSTRUMENT CLUSTER LFT FRT SENSOR (-) LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE PARK BRAKE WARNING SWITCH PNK WIRE PPL PPL/WHT WIRE PUMP MOTOR POWER PUMP MOTOR GROUND RED WIRE RIGHT FRONT WHEEL SPEED SENSOR RT FRT SENSOR (-) LFT FRT SENSOR (+) RT FRT SENSOR (+) TAN WIRE TAN/WHT WIRE TCC/ STOPLAMP SWITCH (ABOVE BRAKE PEDAL) UNDERHOOD FUSE-RELAY CENTER VEHICLE SPEED SENSOR (LEFT SIDE OF TRANSMISSION) LEFT FRONT WHEEL SPEED SENSOR VSS VSS SIG SERIAL DATA LINE SERIAL DATA SIGNAL BRAKE LAMP CONTROL EBCM GROUND W/O DRL W/DRL WHT TAN/ WIRE WHT WIRE YEL WIRE

ABS IND. ABS MAXI FUSE 4 BLK WIRE BLK/ WHT WIRE BLK/WHT WIRE BRAKE FUSE 18 BRAKE IND BRAKE PRESSURE WARNING SWITCH BRAKE SW OUTPUT BRAKE/ BRN WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (LEFT FRONT SIDE OF FRAME) HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN OR START GAUGES FUSE 4 I/P FUSE BLOCK IGN ABS LAMP CONTROL BRAKE SW INPUT INLINE DIODE INSTRUMENT CLUSTER LEFT FRONT WHEEL SPEED SENSOR LFT FRT SENSOR (-) LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE PARK BRAKE WARNING SWITCH PNK WIRE PPL PPL/WHT WIRE PUMP MOTOR POWER PUMP MOTOR GROUND RED WIRE RIGHT FRONT WHEEL SPEED SENSOR RT FRT SENSOR (-) LFT FRT SENSOR (+) RT FRT SENSOR (+) TAN WIRE TAN/WHT WIRE TCC/ STOPLAMP SWITCH (ABOVE BRAKE PEDAL) UNDERHOOD FUSE-RELAY CENTER VEHICLE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (LEFT SIDE OF TRANSMISSION) VEHICLE SPEED SIG VSS VSS SIG SERIAL DATA LINE SERIAL DATA SIGNAL BRAKE LAMP CONTROL EBCM GROUND W/O DRL W/DRL WHT TAN/ WIRE WHT WIRE YEL WIRE

29 30 VSS RTN VSS SIG ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE DIESEL DK GRN WIRE DK GRN/WHT WIRE ENGINE OIL PRESSURE INDICATOR SENDER (TOP REAR OF ENGINE) FUEL PUMP SWITCH, ENGINE OIL PRESSURE GAUGE SENSOR (TOP REAR OF ENGINE) FUEL PUMP, SENDER (IN FUEL TANK) FUEL TANK LEVEL SENDER (IN FUEL TANK) GASOLINE HOT IN ACC OR RUN HOT IN RUN I/P FUSE BLOCK (BEHIND LEFT SIDE OF I/P) IGN INLINE DIODE LOW FLOW LOW PRES. LT GRN WIRE LT GRN/BLK WIRE NCA WIRE P/B BOOSTER FLUID FLOW ALARM P/B BOOSTER FLUID FLOW INDICATOR/ ALARM DELAY MODULE P/B BOOSTER FLUID FLOW SWITCH P/B PRESSURE WARNING SWITCH PARK BRAKE WARNING SWITCH PNK 1 2 3 WIRE PNK WIRE POWERTRAIN CONTROL MODULE (BEHIND CENTER OF I/P) PPL PPL/WHT WIRE RADIO RADIO I FUSE 17 RESISTOR SW SENSE TAN WIRE TAN/WHT WIRE TRANS FUSE 24 TWISTED PAIR VEHICLE CONTROL MODULE (ON LEFT RADIATOR SUPPORT) VEHICLE SPEED SENSOR (LEFT REAR OF TRANSMISSION) VEHICLE SPEED SENSOR BUFFER (DIESEL ONLY) (BEHIND LEFT SIDE OF I/P) VSS OUT VSS RTN GND IGN VSS SIG VSS OUT W/ P/B BOOSTER WHT WIRE YEL WIRE YEL/BLK WIRE