GMC Rally G2500 (1985-1995) red Wiring diagrams

1-2 SHIFT SOL 2-3 SHIFT SOL ALT FUSE BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BRAKE FUSE BRN WIRE BRN/WHT WIRE DATA LINK CONNECTOR (BELOW LEFT SIDE OF DASH) DK BLU WIRE DK BLU/WHT WIRE DK GRN/YEL WIRE ECM BAT FUSE ECM I FUSE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (TOP FRONT OF ENGINE) GRY WIRE GRY/RED WIRE HOT AT ALL TIMES HOT IN RUN 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 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

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

1-2 SHIFT SOL 2-3 SHIFT SOL 3-2 SHIFT SOL ACCELERATOR PEDAL POSITION (APP) MODULE (TOP OF ACCEL- ERATOR BRACKET) ALT FUSE APP #3 APP #3 SENSOR SIG APP 1 APP 2 BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DATA LINK CONNECTOR (BELOW LEFT SIDE OF DASH) DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DK GRN/YEL WIRE ECM BAT FUSE ECM-CRNK FUSE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (LEFT LOWER FRONT OF ENGINE BLOCK) FUSE BLOCK GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN, BULB TEST OR START IGNITION FEED DIAGNOSTIC REQUEST 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 (LEFT SIDE OF DRIVER'S ISLAND) PPL PPL TCC/BRAKE SW PRESSURE CONTROL SOLENOID RANGE MODE SELECTOR RED WIRE RED/BLK WIRE SERVICE ENGINE SOON SPEED SENSOR (LEFT REAR SIDE OF TRANSMISSION) STOP/HAZ FUSE TAN WIRE TCC/STOP LAMP SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) TRANS FLUID TEMP (TFT) SENSOR TRANS FUSE TRANS INPUT SPD SIG LO TRANSMISSION TRANSMISSION INPUT SPEED SENSOR (FRONT OF TRANSMISSION) VEHICLE SPEED SENSOR BUFFER WHT DK GRN/ WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOL TCC SOL 2-3 SHIFT SOL ACCELERATOR PEDAL POSITION (APP) MODULE (TOP OF ACCEL- ERATOR BRACKET) APP #3 APP #3 SENSOR SIG APP 1 APP 2 BATTERY JUNCTION BLOCK BLK PNK/ WIRE 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 GRN WIRE ECM 1 FUSE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (FRONT OF LEFT CYLINDER HEAD) FUSIBLE LINK (20 GA- GAUGES FUSE GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK IGNITION FEED 3-2 CONTROL SOL DIAGNOSTIC REQUEST INSTRUMENT CLUSTER LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (RIGHT KICK PANEL) PPL PPL TCC/BRAKE SW PPL/WHT WIRE PRESSURE CONTROL SOLENOID RANGE MODE SELECTOR RED WIRE RED/BLK WIRE SERVICE ENGINE SOON INDIC SPEED SENSOR (LEFT REAR SIDE OF TRANSMISSION) TAN WIRE TAN/BLK WIRE TCC/STOP LAMP SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) TRANS FLUID TEMP (TFT) SENSOR 3-2 SHIFT SOL TRANS FUSE 20 TRANSMISSION VEHICLE SPEED SENSOR BUFFER (PARKING BRAKE SUPPORT BRACKET) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

** (RIGHT FRAME RAIL, NEAR BATTERY) 1995 VFTC ALT FUSE BAT VOLT SENSE INPUT BATTERY BATTERY JUNCTION BLOCK BLK WIRE BLK/RED WIRE FUSE BLOCK GENERATOR HOT IN RUN, BULB TEST OR START INSTRUMENT CLUSTER PNK/BLK WIRE RECTIFIER BRIDGE RED WIRE REGULATOR (SOLID STATE) STARTER CIRCUIT STATOR SW BAT FIELD (ROTOR) TURN ON INPUT VOLT- METER

1995 VFTC ACCY BATTERY (GASOLINE) BATTERY JUNCTION BLOCK BLK WIRE BULB TEST DIESEL DIESEL ONLY FORWARD BATTERY FUSIBLE LINK (16 GA-RUST) FUSIBLE LINK (20 GA-RUST) GLOW PLUG CONTROLLER (LEFT SIDE OF ENGINE) HOLD-IN WINDING PULL-IN WINDING IGNITION SWITCH LOCK OFF PPL REAR BATTERY RED WIRE RUN WIRE STARTER MOTOR STARTER SOLENOID SOLENOID CONTACTS SUPPORT)

* W/ SCHOOL BUS EQUIPMENT) 1995 VFTC ACCY BATTERY JUNCTION BLOCK BLK WIRE BULB TEST CLUTCH START SWITCH (ON CLUTCH PEDAL SUPPORT BRACKET) FUSIBLE LINK (16 GA-RUST) FUSIBLE LINK E (10 GA-RUST) GENERATOR (FRONT OF ENGINE) BAT HOLD-IN WINDING PULL-IN WINDING IGNITION SWITCH LOCK OFF PPL PPL A/T M/T PPL/WHT WIRE RED WIRE RIGHT (OR FRONT ) BATTERY RUN WIRE STARTER MOTOR STARTER RELAY (LOWER LEFT SIDE OF ENGINE) STARTER SOLENOID SOLENOID CONTACTS

1995 VFTC ACCY BATTERY BATTERY JUNCTION BLOCK BLK WIRE BULB TEST CLUTCH START SWITCH (ON CLUTCH PEDAL SUPPORT BRACKET) FUSIBLE LINK B (14 GA. RUST) HEAD HOLD-IN WINDING PULL-IN WINDING IGNITION SWITCH LOCK OFF PPL PPL A/T M/T RED WIRE RUN WIRE SOLENOID CONTACTS STARTER MOTOR STARTER SOLENOID

1995 VFTC ACCY BATTERY BATTERY JUNCTION BLOCK BLK WIRE BLK/RED WIRE BULB TEST FUSIBLE LINK (16 GA-RUST) HOLD-IN WINDING IGNITION SWITCH LOCK OFF POWER DISTRIBUTION PPL PULL-IN WINDING RED WIRE RUN WIRE SOLENOID CONTACTS STARTER MOTOR STARTER SOLENOID

** (RIGHT FRAME RAIL, NEAR BATTERY) 1995 VFTC ACCY BATTERY BATTERY JUNCTION BLOCK BLK WIRE BULB TEST FUSIBLE LINK (10 GA-RUST) FUSIBLE LINK (14 GA. RUST) GENERATOR (FRONT OF ENGINE) BAT HOLD-IN WINDING IGNITION SWITCH LOCK OFF PPL PULL-IN WINDING RED WIRE RED/BLK WIRE RUN WIRE STARTER MOTOR STARTER SOLENOID SOLENOID CONTACTS