GMC Rally G3500 (1985-1996) dk blu 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

19 20 PNK WIRE 5-VOLT REFERENCE 999 999 SERVICE CIRCUIT POWER SERVICE CIRCUIT POWER A/C SIGNAL A/T INPUT SPEED SENSOR BATTERY BATTERY PRESSURE SW SIGNAL PRESSURE SW SIGNAL BLK WIRE BLK/WHT WIRE BLU WIRE BRAKE FUSE 18 BRN WIRE BRN/WHT WIRE CRUISE CONTROL MODULE (FRONT OF ENGINE COMPARTMENT NEAR LEFT FENDER) CRUISE CTRL SIG-ENG CYL. NO.1 CYL. NO.8 CYL. NO.2 CYL. NO.4 CYL. NO.5 CYL. NO.3 CYL. NO.6 CYL. NO.7 DATA LINK CONNECTOR (UNDER LEFT SIDE OF I/P) DISTRIBUTOR DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) (LEFT FRAME RAIL NEAR CENTER OF VEHICLE) FORCE MOTOR FEED RETURN SIGNAL ELEC SPARK TIMING FUEL PUMP RLY FEED 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 GRY WIRE GVW OVER 8500 LBS. GVW UNDER 8500 LBS HIGH VOLTAGE COIL WIRE HOT IN RUN I/P FUSE BLOCK IGNITION IGNITION COIL (TOP RIGHT SIDE OF ENGINE) IGNITION COIL DRIVER (TOP RIGHT SIDE OF ENGINE) LT BLU/BLK WIRE LT BLU/WHT WIRE ORG/ WIRE PNK IGNITION WIRE PNK PNK 1 2 3 4 5 6 7 8 9 10 11 WIRE PNK WIRE PPL PPL 420 PPL PPL PPL PPL 420 1807 BRAKE SWITCH INPUT SERIAL DATA PRESSURE SW SIGNAL 5 VOLTS REFERENCE RADIO RED WIRE RED/BLK WIRE SENSOR GROUND SERIAL DATA SIGNAL FORCE MOTOR RETURN GROUND GROUND SENSOR GROUND SOLID STATE SPARK PLUGS SPEED SENSOR INPUT VCM SIGNAL STOPLAMP SWITCH INPUT TAN/WHT WIRE TCC SIGNAL TRANSMISSION ONLY) (LEFT SIDE OF TRANSMISSION) VEHICLE CONTROL MODULE (ENGINE COMPARTMENT, LEFT FENDER) VSS SIGNAL VSS SIGNAL OUTPUT VSS SIGNAL OUTPUT MAL FUNC LP OUTPUT 389 419 WHT WIRE WHT/BLK WIRE

1226 1225 RANGE MODE SEL C RANGE MODE SEL B RANGE MODE SEL A 27 28 29 30 31 PPL 3/2 SHIFT SOL. FORCE MOTOR 7 8 9 10 12 13 14 15 VSS RTN GROUND A/C SYSTEM A/T INPUT SPEED SENSOR (LEFT SIDE OF TRANSMISSION NEAR FRONT) ANTI-LOCK BRAKE SYSTEM BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/WHT WIRE CRUISE CONTROL SWITCH DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DK PNK/ PNK WIRE ECT TEMP SENS IN GRN WIRE GRY WIRE GRY/BLK WIRE HEAVY DUTY ELECTRONIC 4-SPD AUTOMATIC OVERDRIVE TRANSMISSION INTAKE MAN AIR TEMP SENS TPS NO.2 SIG GLOW PLUG RELAY FORCE MTR LOW LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MAP SENS INPUT FORCE MTR HI ORG/ WIRE ORG/BLK WIRE PCS LOW PNK PNK PPL 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) (UNDER RIGHT END OF I/P, ABOVE BLOWER MOTOR) PPL PPL BRAKE SW IN BRAKE SWITCH INPUT CRUISE CTRL SW ENGAGE PPL SENSOR RETURN A/C REQUEST SIG PPL/WHT WIRE RADIO RED WIRE RED/BLK WIRE RESUME SENSOR GND SET- SHIFT SOL. SHIFT SOL. RANGE MODE SELECTOR SOLID STATE TAN WIRE TAN/BLK WIRE TIMING STEPPER MTR (LOW) TIMING STEPPER MTR (LOW) TRANSMISSION SPEED INPUT TRANSMISSION TEMP INPUT TRANSMISSION TEMPERATURE SENSOR VEHICLE SPEED SENSOR (ON TRANSMISSION, LEFT REAR SIDE) VEHICLE SPEED SENSOR BUFFER (BELOW LEFT SIDE OF I/P) VSS SIG VSS SIG VSS HI VSS LO SECOND VSS SIG WHT WIRE YEL WIRE YEL/BLK WIRE

27 28 29 30 31 PPL BLK WIRE BLU WIRE BRAKE FUSE 18 BRN WIRE BRN/WHT WIRE DIESEL FUEL FUSE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DK PNK PNK/ LT WIRE ELECTRONIC BRAKE CONTROL MODULE (LEFT FRAME RAIL, NEAR CENTER OF VEHICLE) FUEL INJECTION PUMP ENCODER (TOP OF ENGINE) FUEL SHUTOFF VALVE SOLENOID FUEL SOLENOID DRIVER FUEL TEMP. GRN WIRE GRY WIRE HIGH LOW HOT AT ALL TIMES HOT IN HOT IN RUN OR START I/P FUSE BLOCK LOW HIGH LT BLU WIRE LT GRN WIRE LT LT ORG/ WIRE ORG/BLK WIRE PNK PNK 8 9 WIRE PNK PNK PPL 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 WIRE PNK WIRE PNK/BLK WIRE PPL RED WIRE RED/BLK WIRE RUN WIRE STOP FUSE 1 TAN WIRE TAN/BLK WIRE TCC/STOPLAMP SWITCH (AT REAR OF BRAKE PEDAL SUPPORT BRACKET) TIMING STEPPER MOTOR (TOP FRONT OF ENGINE) TRANS FUSE 20 UNDERHOOD FUSE-RELAY CENTER WHT WIRE YEL WIRE YEL/BLK WIRE

"GLOW PLUGS" INDICATOR BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECM-B FUSE ENG-BAT FUSE FUEL LIFT PUMP (LEFT FRAME RAIL, NEAR CENTER OF VEHICLE) FUEL PUMP RELAY (IN UNDERHOOD FUSE-RELAY CENTER) FUEL PUMP SWITCH AND ENGINE OIL PRESSURE GAUGE SENSOR (TOP REAR OF ENGINE) GAUGES FUSE 4 GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK INSTRUMENT CLUSTER LT GRN WIRE OIL PRESS GAUGE ORG/ WIRE PNK PNK 8 9 WIRE PNK PNK PNK 7 8 9 10 11 WIRE PNK WIRE SERVICE ENGINE SOON INDICATOR SERVICE THROTTLE SOON INDICATOR SPEEDOMETER SOLID STATE LOGIC TAN WIRE UNDERHOOD FUSE-RELAY CENTER WAIT TO WATER IN FUEL INDICATOR WATER IN FUEL INDICATOR SENSOR WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOL. CTRL TCC SOL CTRL A/C COMPRESSOR CLUTCH RELAY (UNDERHOOD FUSE/RELAY CENTER) AIR INJECTION RLY CTRL VSS SIGNAL OUT ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BLU DK WIRE BRN WIRE CAM POS SENS SIGNAL PNK WIRE CAMSHAFT POSITION SENSOR (INSIDE DISTRIBUTOR ASSEMBLY) CRANKSHAFT POSITION SENSOR (LOWER FRONT OF ENGINE) DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE EVAP CAN PURGE VALVE EVAPORATIVE EMISSIONS CANISTER PURGE SOLENOID (RIGHT SIDE OF ENGINE) FUEL INJ 1 CTRL 2-3 SHIFT SOL CTRL FUEL INJ 8 CTRL GRY WIRE IDLE AIR CONTROL SOLENOID (SIDE OF THROTTLE BODY) IGN FEED KNOCK SENS SIGNAL KNOCK SENSOR (ON LEFT SIDE OF ENGINE BLOCK BELOW EXHAUST MANIFOLD) KNOCK SENSOR (ON RIGHT SIDE OF ENGINE BLOCK AHEAD OF STARTER) LEFT SENS LO (POST CAT) LEFT SENS LO (PRE CAT) RIGHT SENS LO (POST CAT) LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MAP SIGNAL INTAKE AIR TEMP SENS ECT SENS SIGNAL NCA WIRE PNK 8 9 10 WIRE PNK IGN FEED SENS RTN SENS SIG WIRE PNK PNK 1 2 WIRE PNK WIRE PNK/BLK WIRE PPL PPL CKP POS SENS RTN VSS RTN VSS SIGNAL CKP POS SIGNAL IN PPL PPL PPL/WHT WIRE RED WIRE RED/BLK WIRE RIGHT SENS LO (PRE CAT) SENS RTN SECONDARY AIR INJECTION REACTION PUMP RELAY (UNDERHOOD FUSE/ RELAY CENTER) SENSOR RTN SENSOR SIGNAL TAN WIRE TAN/WHT WIRE THROTTLE POS SENS VEHICLE CONTROL MODULE (VCM) (ENGINE COMPARTMENT, ON LEFT FENDER APRON) VEHICLE SPEED SENSOR (LEFT SIDE OF TRANS- MISSION) 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

900 900 SERVICE CIRCUIT POWER SERVICE CIRCUIT POWER A/C REQUEST SIGNAL A/T INPUT SPEED SENSOR (INSIDE FRONT OF TRANSMISSION) AIR CONDITIONING SYSTEM B(+) BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CRUISE CONTROL MODULE (FRONT OF ENGINE COMPT NEAR LEFT FENDER) CRUISE CTRL ENGAGED CRUISE CTRL SIG-ENGAGED CYLINDER NO.1 CYLINDER NO.4 CYLINDER NO.5 CYLINDER NO.3 CYLINDER NO.6 CYLINDER NO.7 CYLINDER NO.2 CYLINDER NO.8 DATA LINK CONNECTOR (UNDER LEFT SIDE OF I/P) DISTRIBUTOR DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECM I FUSE ECM-B FUSE ELEC SPK TIMING CTRL SIGNAL EST CTRL EVAP CAN PURGE VAC IN FORCE MTR RTN GROUND GROUND SENS GROUND FORCE MTR FEED SENS RTN SENS RTN ELEC SPK TIMING CTRL SIG FUEL PMP RLY CTRL 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 FUEL PUMP PRIME CONNECTOR FUEL PUMP RELAY UNDERHOOD FUSE-RELAY CENTER GROUND GRY WIRE HIGH VOLTAGE COIL WIRE HOT AT ALL TIMES HOT IN RUN OR START IGN FEED IGN FEED PRESS SW SIG PRESS SW SIG IGNITION COIL (TOP RIGHT SIDE OF ENGINE) IGNITION COIL DRIVER (ON BRACKET AT REAR OF INTAKE PLENUM) LT BLU/BLK WIRE LT BLU/WHT WIRE NCA WIRE ORG/ WIRE PNK IGN FEED WIRE PNK WIRE PPL PPL PNK PNK PNK 1 2 3 4 5 6 WIRE PPL PPL ANTI-LOCK BRAKES SYSTEM PPL PPL BRAKE SW INPUT SERIAL DATA PPL TCC/STOPLAMP INPUT PRESS SW SIG RED WIRE RED/BLK WIRE SOUND SYSTEMS SPARK PLUGS SPEED SENSOR INPUT TAN/WHT WIRE UNDERHOOD FUSE/RELAY CENTER VEHICLE CONTROL MODULE (VCM) (ENGINE COMPARTMENT, ON LEFT FENDER APRON) VSS SIGNAL VSS OUTPUT CHECK ENGINE LP CTRL WHT WIRE WHT/BLK WIRE