GMC Rally G3500 (1985-1996) yel Wiring diagrams

BLK WIRE BLK/WHT WIRE BLU WIRE BRAKE PEDAL) BRN WIRE CENTER HIGH MOUNTED STOP LAMP (CHMSL) CONVEN- IENCE CENTER (UNDER LEFT SIDE OF I/P) INTERIOR LIGHTS SYSTEM CONVENIENCE CENTER (UNDER LEFT SIDE OF I/P) CRUISE CONTROL SYSTEM DK BLU WIRE DK GRN WIRE DK LT HAZ SW TN SW HAZARD HAZARD FUSE 5 HEADLAMP SWITCH HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK INSTRU- MENT CLUSTER RIGHT TURN IND. LEFT LEFT FRONT INNER PARK, TURN SIGNAL LAMP LEFT REAR PARK LEFT SIDE MARKER LAMP LEFT TURN IND LICENSE LAMP LT BLU WIRE LT GRN WIRE LT LT LEFT FRONT OUTER PARK/ TURN SIGNAL LAMP NORMAL OFF HEAD PARK ORG/ WIRE PARK LPS FUSE 9 PNK WIRE PPL RIGHT RIGHT REAR PARK RIGHT SIDE MARKER LAMP STOP FUSE 1 STOP, TAIL LAMP TCC/ STOP LAMP SWITCH (TOP OF TURN B/U FUSE 16 TURN PWR HAZ PWR FLSHR OUT GND TURN SIGNAL LAMP TURN/ HAZARD SWITCH TURN/HAZARD LAMP FLASHER (I/P RELAY CENTER: BELOW CENTER OF I/P) W/ OPTIONAL TRAILER WIRING PACKAGE (RIGHT REAR OF INTERIOR) WHT WIRE YEL WIRE

6 OHMS BLK WIRE BLK/WHT WIRE BLU WIRE BRAKE PEDAL) BRN WIRE CENTER HIGH MOUNTED STOP LAMP (CHMSL) CONVEN- IENCE CENTER (UNDER LEFT SIDE OF I/P) INTERIOR LIGHTS SYSTEM CONVENIENCE CENTER (UNDER LEFT SIDE OF I/P) CRUISE CONTROL SYSTEM DK BLU WIRE DK GRN WIRE DK LT DK RIGHT FRONT PARK HAZ SW TN SW HAZARD HAZARD FUSE 5 HEADLAMP SWITCH HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK IN-LINE RESISTOR INSTRU- MENT CLUSTER RIGHT TURN IND. LEFT LEFT REAR PARK LEFT SIDE MARKER LAMP LEFT TURN IND LICENSE LAMP LT BLU WIRE LT GRN WIRE LT LEFT FRONT PARK NORMAL OFF HEAD PARK ORG/ WIRE PARK LPS FUSE 9 PNK WIRE PPL RIGHT RIGHT REAR PARK RIGHT SIDE MARKER LAMP STOP FUSE 1 STOP, TAIL LAMP TCC/ STOP LAMP SWITCH (TOP OF TURN B/U FUSE 16 TURN PWR HAZ PWR FLSHR OUT GND TURN SIGNAL LAMP TURN/ HAZARD SWITCH TURN/HAZARD LAMP FLASHER (I/P RELAY CENTER: BELOW CENTER OF I/P) W/ OPTIONAL TRAILER WIRING PACKAGE (RIGHT REAR OF INTERIOR) WHT WIRE YEL WIRE

1996 VFTC BLK WIRE BULB TEST DIODE ARRAY DK BLU WIRE DRL FUSE 15 DRL INDICATOR GAUGES FUSE 4 GROUND HEAD HEAD- LAMP DIMMER SWITCH HEADLAMP SWITCH HI BEAM INDICATOR HI BM FEED HI BM INDICATOR DRL RELAY CTRL HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK IGNITION SWITCH INLINE DIODE 201 (I/P HARNESS UNDER LEFT SIDE OF I/P) INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM LEFT HI BEAM HEAD- LAMP LEFT LO BEAM HEADLAMP LIGHTING MAXI FUSE LOCK OFF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE OFF PARK ORG/ WIRE PARK BRAKE WARNING SWITCH (ON PARK BRAKE) PNK IGNITION LAMP FEED WIRE PNK WIRE RED WIRE RIGHT HI BEAM HEAD- LAMP RIGHT LO BEAM HEAD- LAMP RUN WIRE TAN WIRE TAN/WHT WIRE UNDERHOOD FUSE-RELAY CENTER (ENGINE COMPARTMENT, LEFT FENDER) WHT WIRE YEL WIRE

BLK WIRE BULB TEST DIODE ARRAY DK BLU WIRE DRL FUSE 15 DRL INDICATOR GAUGES FUSE 4 GRN WIRE GROUND HEAD HEAD- LAMP DIMMER SWITCH HEADLAMP SWITCH HI BEAM INDICATOR HI BM FEED HI BM INDICATOR DRL RELAY CTRL HI LO HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK IGNITION SWITCH INLINE DIODE 201 (I/P HARNESS UNDER LEFT SIDE OF I/P) INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM LEFT HEAD- LAMP LIGHTING MAXI FUSE LOCK OFF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE OFF PARK ORG/ WIRE PARK BRAKE WARNING SWITCH (ON PARK BRAKE) PNK IGNITION LAMP FEED WIRE PNK WIRE RED WIRE RIGHT HEAD- LAMP RUN WIRE TAN WIRE TAN/WHT WIRE UNDERHOOD FUSE-RELAY CENTER (ENGINE COMPARTMENT, LEFT FENDER) WHT WIRE YEL WIRE

1995 VFTC BLK WIRE BLK/WHT WIRE HEADLAMP SWITCH HI BEAM INDI- CATOR HOT AT ALL TIMES INSTRU- MENT CLUSTER LEFT LO BEAM HEAD- LAMP LO HEADLAMP DIMMER SWITCH LT GRN WIRE OFF OFF HEAD HEAD PARK PARK RIGHT HI BEAM HEAD- LAMP LEFT HI BEAM HEAD- LAMP RIGHT LO BEAM HEAD- LAMP TAN WIRE YEL WIRE

1995 VFTC BLK WIRE BLK/WHT WIRE DK BLU WIRE GRN WIRE HEADLAMP SWITCH HI BEAM INDICATOR HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT HEADLAMP HI LO HEADLAMP DIMMER SWITCH LT GRN WIRE OFF OFF HEAD HEAD PARK PARK RIGHT HEADLAMP LO HI TAN WIRE YEL WIRE

AIR BAG IND ANTI-LOCK BRAKES SYSTEM ENGINE CONTROLS SYSTEM ANTI-LOCK BRAKES WARNING IND BAT IND BLK WIRE BLK/WHT WIRE BRAKE IND IN PARK BRAKE IN BRAKE PRESSURE DIFFERENTIAL SWITCH (PART OF ELECTRONIC BRAKE CONTROL MODULE) BRAKE WARNING IND BRN WIRE BRN/WHT WIRE CHECK GAUGES IND CHECK GAUGES LAMP DRIVER DIESEL ONLY EXTERIOR LIGHTS SYSTEM DIODE DIODE-I DK BLU WIRE DK GRN WIRE DRL LAMP IND (W/ DRL) FUEL GAUGE GAUGES FUSE 4 GRY WIRE HEADLIGHTS SYSTEM HIGH BEAM IND HOT IN RUN OR START I/P FUSE BLOCK (BEHIND LEFT SIDE OF I/P) IGNITION SWITCH ILLUMIN- ATION LAMPS INSTRUMENT CLUSTER LEFT TURN IND LOCK LOW COOLANT IND. (DIESEL) LOW ENGINE COOLANT LEVEL INDICATOR MODULE (DIESEL ONLY) (LEFT SIDE OF I/P) LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE OFF OIL PRESS GAUGE PARK/NEUTRAL POSITION, BACKUP LAMP SWITCH (LEFT SIDE OF TRANSMISSION) PNK 1 2 3 WIRE PNK IGN FEED IND CTRL GND WIRE PNK WIRE PPL PPL/WHT WIRE PRNDL CIRCUIT BOARD RIGHT TURN IND RUN WIRE SAFETY BELT IND SERVICE ENGINE SOON IND SERVICE THROTTLE SOON IND (DIESEL) SOLID STATE SPEEDOMETER/ ODOMETER STARTING/CHARGING SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM TAN WIRE TAN/WHT WIRE TEMP GAUGE UNDERHOOD FUSE-RELAY CENTER (LEFT FENDER) UNDERHOOD FUSE-RELAY CENTER (LEFT FENDER) ENG-I MINI FUSE VOLT- METER W/ DRL W/ DRL ONLY W/O DRL W/O DRL W/ DRL WAIT IND (DIESEL) WARNING SYSTEM ENGINE CONTROLS SYSTEM DIESEL ONLY WATER IN FUEL IND. (DIESEL) WATER-IN-FUEL SENSOR (DIESEL ONLY) (REAR OF INTAKE MANIFOLD) WHT (OR LT GRN) WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK 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

AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BRN WIRE DK BLU WIRE DK BLU/WHT WIRE ENG 1 FUSE EXHAUST GAS RECIRCULATION VALVE SOLENOID (RIGHT SIDE OF ENGINE) FLUID TEMPERATURE SENSOR (INTERNAL) FORCE MOTOR FUEL INJ. NO.1 FUEL INJ. NO.3 FUEL INJ. NO.5 FUEL INJ. NO.4 FUEL INJ. NO.6 FUEL INJ. NO.7 FUEL INJ. NO.2 FUEL INJ. NO.8 GRN WIRE GRY WIRE HOT IN OFF, RUN OR START HOT IN RUN OR START I/P FUSE BLOCK IGNITION INTAKE AIR TEMP SENSOR (MOUNTED IN FRESH AIR INTAKE DUCT) LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE PNK 8 9 10 WIRE PNK PNK 1 2 WIRE PNK PNK PNK 4 5 6 WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL/ WHT WIRE PPL/WHT WIRE RED WIRE RED/BLK WIRE SOLENOID 1-2 SOLENOID 2-3 SWITCH PRESSURE TAN WIRE TAN/ WHT WIRE TAN/WHT WIRE TCC SOLENOID TRANS FUSE 20 UNDERHOOD FUSE/RELAY CENTER WHT LT BLU/ WIRE WHT PPL/ WIRE WHT TAN/ WIRE WHT WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE BLK/WHT WIRE BRAKE FUSE 18 BRN WIRE BRN/WHT WIRE DK BLU WIRE DK GRN WIRE ENGINE COOLANT TEMPERATURE SENSOR (TOP FRONT OF ENGINE) FUEL GAUGE FUEL PUMP, SENDER (ON TOP OF FUEL TANK) FUEL PUMP/ OIL PRESSURE SWITCH (ON ENGINE BLOCK, TOP REAR, BEHIND DISTRIBUTOR) GAUGES FUSE 4 GRY WIRE HOT IN RUN HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK INSTRUMENT CLUSTER LT BLU/WHT WIRE LT GRN WIRE MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR (TOP RIGHT SIDE OF ENGINE) MASS AIR FLOW SENSOR (TOP FRONT OF ENGINE, IN FRESH AIR INTAKE DUCT) NCA WIRE OIL PRESS GAUGE ORG/ WIRE PNK PNK PNK 4 5 6 WIRE PNK WIRE PPL PPL PNK PNK PNK 1 2 3 4 5 6 WIRE RED WIRE RED/BLK WIRE SERVICE ENGINE SOON INDICATOR SPEED METER TAN WIRE TCC/STOP- LAMP SWITCH (UNDER LEFT SIDE OF I/P, ON BRAKE PEDAL SUPPORT BRACKET) THROTTLE POSITION SENSOR (ON SIDE OF THROTTLE BODY) WHT WIRE YEL WIRE