GMC Rally G3500 (1985-1996) red Wiring diagrams

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

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

"SERV ENG SOON" IND ENGINE SHUTOFF SOL OUT "SERV THROTTLE SOON" IND A/C ENABLE PCM GND PCM GND A/C SYSTEM BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/WHT WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE ELECTRONIC BRAKE CONTROL MODULE (LEFT FRAME RAIL, NEAR CENTER OF VEHICLE) ENG-I FUSE FUEL HEATER (TOP REAR OF ENGINE) FUEL SOL MODULE (5 VREF) FUSIBLE LINK FUSIBLE LINK (12 GA. RUST) FUSIBLE LINKS GLOW PLUG CONTROL RELAY (TOP RIGHT SIDE OF ENGINE) GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START LEFT BANK GLOW PLUGS LT GRN WIRE NCA WIRE ORG/ WIRE PNK PNK 339 339 IGNITION IGNITION WIRE PNK PNK PNK 7 8 9 10 11 WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (UNDER RIGHT END OF I/P, ABOVE BLOWER MOTOR) PPL PPL 2 16 DATA LINK CONNECTOR (DLC) (LEFT SIDE OF I/P) PPL SERIAL DATA SIG RED WIRE RIGHT BANK GLOW PLUGS TAN/WHT WIRE TURBO CHARGER WASTEGATE SOLENOID TURBO CHGR PWR VLV CTRL ENGINE SHUTOFF SOL OUT UNDERHOOD FUSE-RELAY CENTER 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