GMC Rally G2500 (1985-1995) vehicle speed sensor buffer Wiring diagrams

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

1995 VFTC ANTI-LOCK BRAKE PUMP MOTOR AUDIO ALARM MODULE BLK WIRE BLK/WHT WIRE BODY BUILDER FRONT MARKER LAMP BODY BUILDER REAR MARKER LAMP BRAKE/ TRANSMISSION SHIFT INTERLOCK SOLENOID SAFETY BELT RETRACTOR SWITCH CIGARETTE LIGHTER COOLANT LEVEL INDICATOR CRUISE CONTROL SERVO DATA LINK CONNECTOR DAYTIME RUNNING LAMPS MODULE DAYTIME RUNNING LAMPS RELAY ENGINE COOLANT LEVEL INDICATOR MODULE FLOW SWITCH (BRAKES) FUEL HEATER GLOW PLUG LAMP INDICATOR GLOW PLUG MODULE HD TRAILER TOW PACKAGE REAR A/C BLOWER MOTOR HEATER CONTROL LAMP INSTRUMENT CLUSTER LEFT BACKUP LAMP LEFT GRID DEFOGGER LEFT REAR SIDE MARKER LAMP LEFT SIDE MARKER LAMP LEFT TAIL/ STOP AND TURN LAMP SIGNAL LIGHT SWITCH MODULE NCA WIRE POWERTRAIN CONTROL MODULE (PCM) RADIO RIGHT BACKUP LAMP RIGHT GRID DEFOGGER RIGHT REAR SIDE MARKER LAMP RIGHT SIDE MARKER LAMP RIGHT TAIL/ STOP AND TURN LAMP SIGNAL TAN/WHT WIRE VEHICLE SPEED SENSOR BUFFER W/ DIESEL ENGINES WATER IN-FUEL SENSOR WHT WIRE WINDSHIELD WASHER PUMP WINDSHIELD WIPER MOTOR MODULE

** (RIGHT FRAME RAIL, NEAR BATTERY) A/C COMPRESSOR CLUTCH AUXILLIARY COOLING FAN AUDIO ALARM MODULE AUTO APPLY PARK BRAKE DATA LINK CONN- ECTOR POWERTRAIN CONTROL MODULE (PCM) AUXILLIARY COOLING FAN COOLANT PRESSURE SWITCH BATTERY BLK WIRE BLK/WHT WIRE BRAKE TRANSMISSION SHIFT INTERLOCK SOLENOID BRAKE/ TRANSMISSION SHIFT INTERLOCK RELAY CRUISE CONTROL MODULE DAYTIME RUNNING LAMPS MODULE DAYTIME RUNNING LAMPS RELAY FUEL PUMP FUEL PUMP RELAY G# N/A (AT LEFT REAR FRAME RAIL) G# N/A (AT LEFT SHIPPING PANEL) G#S N/A (IN FORWARD LAMPS HARNESS) HEADLAMP DIMMER SWITCH I/P CLUSTER LEFT HIGH BEAM HEADLAMP LEFT HIGH/LOW BEAM HEADLAMP PROVISIONS FOR LEFT SIDE MARKER LAMP PROVISIONS FOR RIGHT SIDE MARKER LAMP RIGHT HIGH BEAM HEADLAMP RIGHT HIGH/LOW BEAM HEADLAMP TAN WIRE TRANSMISSION RANGE INDICATOR LAMP VEHICLE SPEED SENSOR BUFFER W/ DAYTIME RUNNING LIGHTS WHT/ BLK WIRE WIPER/ WASHER SWITCH

1995 VFTC ALT FUSE AUDIO ALARM MODULE BACKUP LAMP SWITCH (MANUAL TRANS) BACKUP LAMP SWITCH (AUTO TRANS) COLD ADVANCE FAST IDLE TEMPERATURE SWITCH WATER-IN-FUEL SENSOR CONVENIENCE CENTER DK BLU WIRE ECM CRANK FUSE FROM FUSIBLE LINK A FROM IGNITION SWITCH FUEL HEATER GENERATOR FUSE BLOCK GLOW PLUG CONTROLLER I/P CLUSTER PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE RED WIRE TCC/ BRAKE SWITCH TRANS FUSE TRANSMISSION TRANSMISSION CONTROL MODULE TURN SIGNAL FLASHER TURN-B/U FUSE VEHICLE SPEED SENSOR BUFFER WITH AUTOMATIC TRANSMISSION ONLY

ALT FUSE AUDIO ALARM MODULE BACKUP LAMP SWITCH CONVENIENCE CENTER DK BLU WIRE ECM CRANK FUSE EVAPORATIVE CANISTER PURGE SOLENOID FUSE BLOCK I/P CLUSTER IDLE SPEED CONTROL ACTUATOR IGNITION COIL IGNITION SWITCH INJ FUSE INJECTOR 1 INJECTOR 2 KNOCK SENSOR SYSTEM PNK WIRE PNK/BLK WIRE RED WIRE TCC/ BRAKE SWITCH TRANS FUSE TRANSMISSION TRANSMISSION CONTROL MODULE TURN SIGNAL FLASHER TURN-B/U FUSE VEHICLE SPEED SENSOR BUFFER VIN N W/ AUTOMATIC TRANSMISSION W/ AUTOMATIC TRANSMISSION WHT WIRE

AUDIO ALARM MODULE BRAKE WARNING ALARM BUZZER CONVENIENCE CENTER CRUISE CONTROL BRAKE SWITCH CRUISE CONTROL SWITCH CURISE CONTROL MODULE DAYTIME RUNNING LAMPS DAYTIME RUNNING LAMPS RELAY ECM I FUSE ELECTRONIC 4-SPEED AUTOMATIC OVERDRIVE TRANSMISSION EVAPORATIVE CANISTER PURGE VALVE EXHAUST GAS RECIRCULATION VALVE FUSE BLOCK GAGES FUSE GENERATOR IDLE SPEED CONTROL ACTUATOR IGNITION COIL IGNITION SWITCH INJECTOR 1 INJECTOR 2 INSTRUMENT CLUSTER LINEAR EGR VALVE MODULE NCA WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) POWERTRAIN CONTROL MODULE (PCM) (VIN K ONLY) RED WIRE RESISTOR SHUNT TCC/ BRAKE SWITCH TRANS FUSE VEHICLE SPEED SENSOR BUFFER VIN N ONLY WHT WIRE

1995 VFTC AUXILIARY COOLING FAN CONTROL RELAY AUXILIARY FUSE BLOCK BASE MODELS BATT BUS BATTERY JUNCTION BLOCK BLK WIRE BRAKE FUSE BRN WIRE CIGARETTE LIGHTER DAYTIME RUNNING LAMPS RELAY DRL FUSE F/PMP FUSE FORWARD BATTERY FOUR- WHEEL ANTILOCK BRAKE MODULE FOUR- WHEEL ANTILOCK BRAKE MODULE ELECTRONIC INJECTION PUMP (DRIVER) FROM IGNITION SWITCH FRONT DOME LAMP FUEL SHUT OFF SOLENOID FUSE BLOCK FUSIBLE FUSIBLE LINK GLOW PLUG CONTROL MODULE GLOW PLUG CONTROLLER GENERATOR HEADLIGHT RADIO SWITCH ASSEMBLY HIGH BLOWER RELAY HORN RELAY INTERIOR LIGHTING CONTROL SWITCH REAR DOME LAMP HORN- DM FUSE IN-LINE FUSE LINK ORG/ WIRE PNK PNK WIRE PNK WIRE PNK/WHT WIRE POWER MIRROR CONTROL SWITCH RIGHT VISOR MIRROR LAMP LEFT VISOR MIRROR LAMP POWERTRAIN PULSE WIPER WIPER/ CONTROL WASHER MOTOR MODULE SWITCH MODULE PWR ACC BUS RADIO FUSE WIPER FUSE ECMB FUSE RADIO WINDSHIELD REAR BATTERY RED WIRE SHUNT STARTER MOTOR TAIL LPS FUSE TO IGNITION SWITCH TO STOP-HZ FUSE, PWR ACC CIRCUIT BREAKER (FUSE BLOCK) TO TRAILER WIRING VEHICLE SPEED SENSOR BUFFER VIN P ONLY VIN Y ONLY WHT WIRE WITH DOME AND STEPWELL LAMPS ONLY YEL WIRE

1995 VFTC ACCY ACCY BULB TEST LOCK OFF ANTI- LOCK MODULE AUXILIARY FUSE BLOCK DRL FUSE BATT BUS SHUNT BATTERY BATTERY JUNCTION BLOCK BLK WIRE BLK/RED WIRE BRK FUSE BRN WIRE BULB BULB TEST CIGARETTE LIGHTER DAYTIME RUNNING LAMPS RELAY F/PMP FUSE FOUR- WHEEL ANTILOCK BRAKE MODULE FRONT DOME LAMP FUEL PUMP OIL PRESSURE SWITCH AND SENDER FUEL PUMP RELAY FUSE BLOCK FUSIBLE FUSIBLE LINK GENERATOR AUXILIARY COOLING FAN CONTROL RELAY (VIN N, W/ AIR CONDITIONER ONLY) HEADLIGHT RADIO SWITCH ASSEMBLY HIGH BLOWER RELAY HORN RELAY DOME LAMP INTERRUPT SWITCH REAR DOME LAMP HORN- DM FUSE IGNITION COIL IGNITION SWITCH IN-LINE FUSE LINK LOCK OFF LOCK TEST OFF ORG/ WIRE PNK WIRE POWER MIRROR CONTROL SWITCH POWERTRAIN CONTROL MODULE PPL PULSE WINDSHIELD WIPER WIPER/ WASHER MOTOR SWITCH MODULE PWR ACC BUS RADIO DRL MODULE RADIO FUSE WIPER FUSE ECMB FUSE RED WIRE RUN WIRE STARTER MOTOR STARTER SOLENOID TAIL LPS FUSE TAN/WHT WIRE TO AUX HTR A/C, HTR A/C FUSES, PWR WDO CIRCUIT BREAKER TO SIR (OR AIRBAG), TO SIR CRANK FUSE TO STOP-HZ FUSE, PWR ACC CIRCUIT BREAKER TRAILER WIRING TRANS, ECMI, TURN-B/U, GAGES FUSES VEHICLE SPEED SENSOR BUFFER WHT WIRE YEL WIRE

1995 VFTC ALT FUSE AUDIO ALARM MODULE BACKUP LAMP SWITCH CONVENIENCE CENTER CRUISE CONTROL ACTIVATOR CRUISE CONTROL BRAKE SWITCH CRUISE CONTROL MODULE DK BLU WIRE ECM-CRNK FUSE ELECTRONIC 4-SPEED AUTOMATIC OVERDRIVE TRANSMISSION EVAPORATIVE CANISTER PURGE SOLENOID FUSE BLOCK GENERATOR IDLE SPEED CONTROL ACTUATOR IGNITION COIL IGNITION SWITCH INJ FUSE INJECTOR 1 INJECTOR 2 INSTRUMENT CLUSTER LINEAR EGR SOLENOID VALVE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) RED WIRE TCC/ STOPLAMP SWITCH TRANS FUSE TURN SIGNAL FLASHER TURN-B/U FUSE VEHICLE SPEED SENSOR BUFFER WHT WIRE

ALT FUSE AUDIO ALARM MODULE BACKUP LAMP SWITCH CRUISE CONTROL BRAKE SWITCH CRUISE CONTROL MODULE CRUISE CONTROL SWITCH DK BLU WIRE ECM CRANK FUSE EVAPORATIVE EMISSIONS CANISTER PURGE SOLENOID FUSE BLOCK GENERATOR IDLE SPEED CONTROL ACTUATOR IGNITION COIL IGNITION SWITCH INJ FUSE INJECTOR 1 INJECTOR 2 INSTRUMENT CLUSTER PRINTED CIRCUIT LINEAR EGR SOLENOID VALVE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) RED WIRE TCC/ STOPLAMP SWITCH TRANS FUSE TRANSMISSION TURN SIGNAL FLASHER TURN-B/U FUSE VEHICLE SPEED SENSOR BUFFER WHT WIRE