GMC Rally G2500 (1985-1995) blk Wiring diagrams

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

2-3 SHIFT SOL 3-2 SOL 1-2 SHIFT SOL 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 ECM I FUSE ECM-B FUSE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (TOP FRONT OF ENGINE) GAGES FUSE GRY WIRE HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK INSTRUMENT CLUSTER LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) (RIGHT KICK PANEL) PPL 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/WHT WIRE TCC/STOPLAMP 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 (PARKING BRAKE SUPPORT BRACKET) 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 ACCE- LERATOR BRACKET) ALT FUSE APP #3 APP #3 SENSOR SIG APP 1 BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BRN WIRE DATA LINK CONNECTOR (BELOW LEFT SIDE OF I/P) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DK GRN/YEL WIRE ECM BAT FUSE ECM CRANK FUSE ELECTRONIC 4-SPEED AUTOMATIC OVERDRIVE TRANSMISSION ENGINE COOLANT TEMPERATURE (ECT) SENSOR (RIGHT SIDE OF ENGINE) GRY WIRE HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START HOT IN START OR RUN FUSE BLOCK TRANS FUSE IGNITION FEED DIAGNOSTIC REQUEST LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE PPL PPL APP #2 PPL APP #2 SENSOR SIG APP #1 SENSOR GROUND APP #3 SENSOR GROUND SENSOR GROUND PPL TCC/BRAKE SW VEHICLE SPEED SIG PRESSURE CONTROL SOLENOID RANGE MODE SELECTOR RED WIRE RED/BLK WIRE SPEED SENSOR (LEFT REAR SIDE OF TRANSMISSION) TAN WIRE TAN/BLK WIRE TCC/ BRAKE SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) TRANS FLUID TEMP (TFT) SENSOR TRANSFER CASE SWITCH VEHICLE SPEED SENSOR BUFFER MODULE (UNDER RIGHT END OF I/P) WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOL TCC SOL 2-3 SHIFT SOL 3-2 SHIFT SOL ACCELERATOR PEDAL POSITION (APP) MODULE (TOP OF ACCEL- ERATOR BRACKET) APP #2 PNK PPL WIRE APP #3 APP #3 SENSOR SIG APP 1 BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BRK FUSE BRN WIRE DATA LINK CONNECTOR (BELOW LEFT SIDE OF I/P) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM I FUSE ECM-B FUSE ELECTRONIC 4-SPEED AUTOMATIC OVERDRIVE TRANSMISSION ENGINE COOLANT TEMPERATURE (ECT) SENSOR (RIGHT SIDE OF ENGINE) HOT AT ALL TIMES HOT IN RUN HOT IN START OR RUN HOT IN START OR RUN FUSE BLOCK TRANS FUSE INGNITION FEED 3-2 CONTROL SOL DIAGNOSTIC REQUEST LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PNK/BLK WIRE PNK/WHT WIRE POWERTRAIN CONTROL MODULE PPL PPL APP #2 SENSOR GROUND APP #1 SENSOR GROUND APP #3 SENSOR GROUND SENSOR GROUND PPL TCC/BRAKE SW VEHICLE SPEED SIG PPL/WHT WIRE PRESSURE CONTROL SOLENOID RANGE MODE SELECTOR RED WIRE RED/BLK WIRE SPEED SENSOR (LEFT REAR SIDE OF TRANSMISSION) TAN WIRE TAN/BLK WIRE TCC/ BRAKE SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) TRANS FLUID TEMP (TFT) SENSOR TRANSFER CASE SWITCH VEHICLE SPEED SENSOR BUFFER (UNDER RIGHT END OF I/P) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

3-2 CONTROL SOLENOID SHIFT SOL B 5 VOLTS REF BATTERY POWER BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BRAKE/ TRANSMISSION SHIFT INTERLOCK RELAY BRN WIRE DATA LINK CONNECTOR (PARTIAL) DK BLU WIRE DK BLU/WHT WIRE ECMB FUSE ENGINE SPEED SENSOR (TOP REAR OF ENGINE) ENGINE SPEED SENSOR IN SENSOR GROUND TP SENSOR INPUT FORCE MOTOR HI IGNITION FORCE MOTOR LOW FUSE FUSE BLOCK- I/P GAGES FUSE GRY WIRE GRY/BLK WIRE GRY/RED WIRE HEAVY DUTY ELECTRONIC 4-SPEED AUTOMATIC OVERDRIVE TRANSMISSION HOT AT ALL TIMES HOT IN RUN OR START INSTRUMENT CLUSTER SYSTEM LT BLU/WHT WIRE LT GRN WIRE MANIFOLD ABSOLUTE PRESSURE SENSOR (REAR OF ENGINE COMPT, CENTER OF SAFETY WALL) ORG/ WIRE ORG/BLK WIRE PNK RANGE MODE SELECTOR A RANGE MODE SELECTOR B RANGE MODE SELECTOR C WIRE PNK WIRE PNK/BLK WIRE PPL PPL BRAKE SWITCH INPUT 2-3 CONTROL OUTPUT PRESSURE CONTROL SOLENOID RANGE MODE SELECTOR RED WIRE RED/BLK WIRE SENSOR (LEFT SIDE OF TRANSMISSION) SERVICE TRANS OUTPUT DLC INPUT SHIFT SOL A SHIFT SOLENOID B OUTPUT SHIFT SOLENOID A OUTPUT DLC INPUT SPEED SENSOR INPUT TRANSMISSION SPEED INPUT TRANSMISSION SPEED INPUT SYSTEM GROUND SYSTEM GROUND TAN/WHT WIRE TCC SOL TCC/BRAKE SWITCH (BELOW LEFT SIDE OF I/P, ABOVE BRAKE PEDAL) THROTTLE POSTITION SENSOR (ON INJECTION PUMP) TRANS- MISSION TEMP TRANSMISSION CONTROL MODULE (TCM) (BELOW DRIVER'S SEAT) TRANSMISSION INPUT SPEED TRANSMISSION TEMP INPUT MAP SENSOR INPUT VEHICLE SPEED SENSOR BUFFER WHT WIRE WHT/BLK WIRE YEL/BLK WIRE

2-3 SHIFT SOL 3-2 SOL 1-2 SHIFT SOL 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 ECM I FUSE ECM-B FUSE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (TOP FRONT OF ENGINE) GAGES FUSE GRY WIRE HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK INSTRUMENT CLUSTER LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) (RIGHT KICK PANEL) PPL 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/WHT WIRE TCC/STOPLAMP 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 (PARKING BRAKE SUPPORT BRACKET) WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

1995 VFTC AUDIO ALARM MODULE BATTERY INPUT GROUND BLK WIRE FUSE BLOCK GAGES FUSE GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START HOT WITH HEADLIGHT SWITCH IN PARK OR HEAD IGN ON INPUT INST LPS FUSE INSTRUMENT CLUSTER FASTEN BELTS INDICATOR KEY-IN WARNING BUZZER SWITCH LEFT DOOR JAMB SWITCH LIGHTS ON INPUT SAFETY BELT INPUT LT GRN WIRE ORG/ WIRE PNK/BLK WIRE SAFETY BELT BUCKLE SWITCH SAFETY BELT INPUT FASTEN BELTS OUT STOP- HZ FUSE TAN WIRE WHT WIRE YEL WIRE

1995 VFTC ALT FUSE AUDIO ALARM MODULE BLK WIRE FASTEN BELTS INDICATOR FASTEN BELTS OUTPUT IGNITION ON INPUT FUSE BLOCK GROUND HOT IN RUN OR START INSTRUMENT CLUSTER PNK/BLK WIRE YEL WIRE

1995 VFTC AUDIO ALARM MODULE BATTERY INPUT GROUND BLK WIRE FASTEN BELTS INDICATOR FASTEN BELTS OUT FUSE BLOCK GAGES FUSE GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START HOT WITH HEADLIGHT SWITCH IN PARK OR HEAD IGN ON INPUT INST LPS FUSE INSTRUMENT CLUSTER KEY-IN WARNING BUZZER SWITCH LEFT DOOR JAMB SWITCH LIGHTS ON INPUT SAFETY BELT INPUT LT GRN WIRE ORG/ WIRE PNK/BLK WIRE SAFETY BELT INPUT SAFETY BELT RETRACTOR SWITCH (IN DRIVER'S SAFETY BELT BUCKLE) STOP- HZ FUSE TAN WIRE YEL WIRE

AUDIO ALARM MODULE BLK WIRE FASTEN BELTS INDICATOR FUSE BLOCK GAUGES FUSE GRY WIRE HORN/DM FUSE HOT AT ALL TIMES HOT IN RUN OR START HOT WITH HEADLIGHT SWITCH IN PARK OR HEAD INSTR LPS FUSE INSTRUMENT CLUSTER ORG/ WIRE PNK/BLK WIRE YEL WIRE