GMC Rally G3500 (1985-1996) org/ Wiring diagrams

4000 PULSES/MILE CRUISE STATUS BLK WIRE BLK/WHT WIRE BLU WIRE BRAKE FUSE 18 STOP FUSE 1 BRN WIRE CRUISE CONTROL MODULE (FRONT OF ENGINE COMPT NEAR LEFT FENDER) CRUISE FUSE 6 CRUISE STATUS VEHICLE SPEED INPUT DK BLU WIRE DK GRN/WHT WIRE FUSE BLOCK GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN LT BLU/BLK WIRE LT GRN/BLK WIRE MULTIFUNCTION LEVER OFF ORG/ WIRE PPL PPL/WHT WIRE R/A S/C DK TCC/STOPLAMP BRAKE SWITCH (BELOW CENTER OF I/P) VEHICLE CONTROL MODULE (VCM) (IN ENGINE COMPT, ON LEFT FENDER) VEHICLE SPEED SENSOR (VSS) (LEFT SIDE OF TRANSMISSION) VSS RETURN VSS SIGNAL WHT WIRE

BLK WIRE BLU WIRE BRAKE APPLIED INPUT BRAKE FUSE 18 STOP FUSE 1 BRN WIRE CRUISE FUSE 6 CRUISE ON INPUT DK BLU WIRE FUSE BLOCK GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN MULTIFUNCTION LEVER OFF ORG/ WIRE POWERTRAIN CONTROL MODULE (PCM) (BEHIND CENTER OF I/P) PPL PPL DISENGAGE INPUT R/A RESUME/ACCEL INPUT S/C DK SET/COAST INPUT TCC/STOPLAMP BRAKE SWITCH (BELOW CENTER OF I/P) VEHICLE SPEED BUFFER (BELOW LEFT SIDE OF I/P) VSS WHT WIRE

4000 PULSES/MILE CRUISE STATUS BLK WIRE BLK/WHT WIRE BLU WIRE BRAKE FUSE 18 STOP FUSE 1 BRN WIRE CRUISE CONTROL MODULE (FRONT OF ENGINE COMPT NEAR LEFT FENDER) CRUISE FUSE 6 CRUISE STATUS VEHICLE SPEED INPUT DK BLU WIRE DK GRN/WHT WIRE FUSE BLOCK GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN LT BLU/BLK WIRE LT GRN/BLK WIRE MULTIFUNCTION LEVER OFF ORG/ WIRE PPL PPL/WHT WIRE R/A S/C DK TCC/STOPLAMP BRAKE SWITCH (BELOW CENTER OF I/P) VEHICLE CONTROL MODULE (VCM) (IN ENGINE COMPT, ON LEFT FENDER) VEHICLE SPEED SENSOR (VSS) (LEFT SIDE OF TRANSMISSION) VSS RETURN VSS SIGNAL WHT WIRE

1-2 SHIFT SOL 2-3 SHIFT SOL ALT FUSE BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BRN WIRE BRN/WHT WIRE DATA LINK CONNECTOR (BELOW LEFT SIDE OF DASH) DK BLU WIRE DK BLU/WHT WIRE ECM BAT FUSE ECM-CRNK FUSE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (TOP FRONT OF ENGINE) GRY WIRE GRY/RED WIRE HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK INSTRUMENT CLUSTER LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) (LEFT SIDE OF DRIVER'S ISLAND) PPL PPL PNK WIRE PRESSURE CONTROL SOLENOID RANGE MODE SELECTOR RED WIRE RED/BLK WIRE SERVICE ENGINE SOON SPEED SENSOR (LEFT REAR SIDE OF TRANSMISSION) TAN WIRE TCC PWM SOL TCC/BRAKE SWITCH (ON BRAKE PEDAL BRACKET) THROTTLE POSITION SENSOR (RIGHT SIDE OF TBI) TRANS FLUID TEMP (TFT) SENSOR TRANS FUSE TRANSMISSION TRANSMISSION INPUT SHAFT SPEED SENSOR (FRONT OF TRANSMISSION) VEHICLE SPEED SENSOR BUFFER WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

A/C BI-LEV A/C COMPRESSOR CLUTCH COIL A/C COMPRESSOR CLUTCH RELAY (IN UNDERHOOD FUSE/RELAY CENTER) A/C COMPRESSOR HIGH PRESSURE CUTOFF SWITCH (REAR OF A/C COMPRESSOR) A/C COMPRESSOR LOW PRESSURE CUTOFF SWITCH (IN REFRIGERANT LINE) AUXILIARY BLOWER MOTOR AUXILIARY BLOWER MOTOR RESISTOR (LEFT REAR OF CABIN, BEHIND REAR WHEELHOUSE) BLK WIRE BLOWER MOTOR BLOWER MOTOR RESISTOR/RELAY (AT HVAC CONTROL PANEL) BRN WIRE COMPT AT LEFT FENDER) POWERTRAIN CONTROL MODULE (BEHIND (DIESEL) CENTER OF I/P) CONVENIENCE CENTER DIODE (IN UNDERHOOD FUSE/RELAY CENTER) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE EXCEPT 7.4L PNK WIRE FUSE 12 FUSE 24 GASOLINE GASOLINE DIESEL GRN WIRE GRY WIRE HEATER AND A/C CONTROLLER HOT AT ALL TIMES HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN HOT IN RUN OR START HVAC FUSE I/P FUSE BLOCK LT BLU WIRE LT GRN WIRE OFF LO MED HI OFF MAX ORG/ WIRE PNK PNK 7.4L UNDER- HOOD FUSE/ RELAY CENTER WIRE PNK WIRE PPL REAR AUXILIARY HVAC CONTROL MODULE RED WIRE TAN WIRE TEMP UNDER- HOOD FUSE/ RELAY CENTER A/C FUSE IGN E FUSE UNDERHOOD FUSE/RELAY CENTER RR HVAC FUSE VEHICLE CONTROL MODULE (IN ENGINE VENT HEAT BLEND DEF VENT HEAT BLEND DEF OFF MAX A/C BI-LEV VENT MODE WHT WIRE YEL WIRE

A/C BI-LEV A/C COMPRESSOR CLUTCH COIL A/C COMPRESSOR CLUTCH RELAY (IN UNDERHOOD FUSE/RELAY CENTER) A/C COMPRESSOR HIGH PRESSURE CUTOFF SWITCH (REAR OF A/C COMPRESSOR) A/C COMPRESSOR LOW PRESSURE CUTOFF SWITCH (IN REFRIGERANT LINE) AUXILIARY BLOWER MOTOR AUXILIARY BLOWER MOTOR RESISTOR (LEFT REAR OF CABIN, BEHIND REAR WHEELHOUSE) BLK WIRE BLOWER MOTOR BLOWER MOTOR RESISTOR/RELAY (AT HVAC CONTROL PANEL) BRN WIRE COMPT AT LEFT FENDER) POWERTRAIN CONTROL MODULE (BEHIND (DIESEL) CENTER OF I/P) CONVENIENCE CENTER DIODE (IN UNDERHOOD FUSE/RELAY CENTER) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE EXCEPT 7.4L PNK WIRE FRONT AUXILIARY HVAC CONTROL MODULE FUSE 12 FUSE 24 GASOLINE GASOLINE DIESEL GRN WIRE GRY WIRE HEATER AND A/C CONTROL LOGIC MODULE (FRONT INTERIOR ROOF PANEL) HEATER AND A/C CONTROLLER HOT AT ALL TIMES HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN HOT IN RUN OR START HVAC FUSE I/P FUSE BLOCK LT BLU WIRE LT GRN WIRE OFF LO MED HI OFF MAX ORG/ WIRE PNK PNK 7.4L UNDER- HOOD FUSE/ RELAY CENTER WIRE PNK WIRE PPL REAR AUXILIARY HVAC CONTROL MODULE RED WIRE RR CTRL OFF LO MED HI TAN WIRE TEMP UNDER- HOOD FUSE/ RELAY CENTER A/C FUSE IGN E FUSE UNDERHOOD FUSE/RELAY CENTER RR HVAC FUSE VEHICLE CONTROL MODULE (IN ENGINE VENT HEAT BLEND DEF VENT HEAT BLEND DEF OFF MAX A/C BI-LEV VENT MODE WHT WIRE YEL WIRE

3 2 PPL BLK WIRE BLK/WHT WIRE CONVENIENCE CENTER (BEHIND LEFT SIDE OF I/P) DATA LINK CONNECTOR (BELOW LEFT SIDE OF I/P) DIESEL GASOLINE DLC CONTROL ELECTRONIC BRAKE CONTROL MODULE (LEFT FRAME RAIL, NEAR CENTER OF VEHICLE) HOT AT ALL TIMES I/P FUSE BLOCK INFLATABLE RESTRAINT CONTROL MODULE (UNDER LEFT FRONT SEAT) ORG/ WIRE POWERTRAIN CONTROL MODULE (BEHIND CENTER OF I/P) PPL DATA CLSS 2 PROG ENABLE PWR AUX FUSE 7 REMOTE CONTROL DOOR LOCK RECEIVER (UPPER RIGHT KICK PANEL) TAN WIRE TAN/WHT WIRE UART DATA VEHICLE CONTROL MODULE (LEFT FRONT FENDER APRON)

1995 VFTC BLK WIRE CONTROL AREA DELAY/ SPEED/ WASH CONTROL FUSE BLOCK FUSIBLE LINK GRY WIRE HOT IN ACCY OR RUN I/P GROUND (IN I/P HARNESS) IGN MIST OFF ORG/ WIRE PARK SWITCH PNK WIRE PPL PULSE WASH PULSE SWITCH WHT WIRE WINDSHIELD WASHER PUMP WINDSHIELD WIPER MOTOR MODULE WINDSHIELD WIPER/ WASHER SWITCH WIPER FUSE

1995 VFTC BLK WIRE BRN WIRE CONVENIENCE CENTER (UNDER LEFT SIDE OF I/P) HEATED MIRROR SWITCH HEATER-A/C CONTROL HOT AT ALL TIMES HOT IN HTR A/C FUSE 12 HTR MIR FUSE 2 I/P FUSE BLOCK LEFT POWER OUTSIDE REAR VIEW MIRROR ORG/ WIRE RIGHT POWER OUTSIDE REAR VIEW MIRROR RUN WIRE SOLID STATE TIMER W/ UPLIFTER PROVISIONS ONLY

AUXILIARY BLOWER MOTOR AUXILIARY BLOWER MOTOR RESISTOR (LEFT REAR OF CABIN, BEHIND REAR WHEELHOUSE) BLK WIRE BLOWER MOTOR BLOWER MOTOR RESISTOR/RELAY (AT HVAC CONTROL PANEL) BRN WIRE CONVENIENCE CENTER DK BLU WIRE DK GRN WIRE FUSE 12 FUSE 24 GRY WIRE HEAT BLEND DEF HEATER CONTROLLER HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START HVAC FUSE I/P FUSE BLOCK LT BLU WIRE OFF OFF LO MED HI ORG/ WIRE PPL REAR AUXILIARY HVAC CONTROL MODULE REAR AUXILIARY MODE VALVE AND SEAT ASSY (LEFT REAR INTERIOR) REAR AUXILIARY TEMPERATURE VALVE ASSY (LEFT REAR INTERIOR) RED WIRE TAN WIRE TEMP UNDERHOOD FUSE/RELAY CENTER RR HVAC FUSE VENT VENT MODE WHT WIRE YEL WIRE