Buick Regal III (1988-1997) underhood electrical center 1 Wiring diagrams

1995 VFTC A/C COMPRESSOR CLUTCH COIL A/C COMPRESSOR CLUTCH DIODE A/C COMPRESSOR RELAY (IN UNDERHOOD ELECTRICAL CENTER) A/C REFRIGERANT PRESSURE SENSOR (RIGHT SIDE OF ENGINE COMPARTMENT) BLK WIRE BRN WIRE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM BAT FUSE ENGINE COOLANT TEMPERATURE SENSOR (LEFT TOP OF ENGINE) ENGINE COOLING FAN MOTOR 1 FAN CONTROL GRY WIRE HOT AT ALL TIMES HOT IN RUN ENG EMIS FUSE LT BLU WIRE LT GRN WIRE MAXI FUSE 1 MAXI FUSE 3 NCA WIRE ORG/ WIRE RED WIRE RED/BLK WIRE UNDERHOOD ELECTRICAL CENTER 1 WHT WIRE YEL WIRE

1995 VFTC A/C COMPRESSOR CLUTCH COIL A/C COMPRESSOR CLUTCH DIODE A/C COMPRESSOR RELAY (IN UNDERHOOD ELECTRICAL CENTER) A/C REFRIGERANT PRESSURE SENSOR (RIGHT SIDE OF ENGINE COMPARTMENT) BLK WIRE BRN WIRE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM BAT FUSE ENGINE COOLANT TEMPERATURE SENSOR (LEFT TOP OF ENGINE) ENGINE COOLING FAN MOTOR 1 ENGINE COOLING FAN MOTOR 2 FAN CONTROL RELAY 1 (IN UNDERHOOD ELECTRICAL CENTER) FAN CONTROL RELAY 2 (IN UNDERHOOD ELECTRICAL CENTER) GRY WIRE HOT AT ALL TIMES HOT IN RUN ENG EMIS FUSE LEFT ELECTRIC ACTUATOR LT BLU WIRE LT GRN WIRE MAXI FUSE 1 MAXI FUSE 3 NCA WIRE ORG/ WIRE PASSENGER HEATER-A/C CONTROL SELECT SWITCH RED WIRE RED/BLK WIRE RIGHT ELECTRIC ACTUATOR SOLID STATE UNDERHOOD ELECTRICAL CENTER 1 WHT WIRE YEL WIRE

1995 VFTC A/C COMPRESSOR CLUTCH COIL A/C COMPRESSOR CLUTCH DIODE A/C COMPRESSOR HIGH PRESSURE CUT OFF SWITCH (BACK OF COMPRESSOR) A/C COMPRESSOR PRESSURE CYCLING SWITCH (ON SIDE OF EVAPORATOR) A/C COMPRESSOR RELAY (IN UNDERHOOD ELECTRICAL CENTER) A/C HEAD PRESSURE SWITCH (RIGHT SIDE OF ENGINE COMPARTMENT) A/C REQUEST RELAY CONTROL RELAY CONTROL RELAY CONTROL PRESSURE SW INPUT BLK WIRE BRN WIRE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM BAT FUSE ENGINE COOLING FAN MOTOR 1 ENGINE COOLING FAN MOTOR 2 FAN CONTROL RELAY 1 (IN UNDERHOOD ELECTRICAL CENTER) FAN CONTROL RELAY 2 (IN UNDERHOOD ELECTRICAL CENTER) HOT AT ALL TIMES HOT IN RUN ENG EMIS FUSE LT BLU WIRE LT GRN WIRE MAXI FUSE 1 MAXI FUSE 3 NCA WIRE ORG/ WIRE RED WIRE RED/BLK WIRE UNDERHOOD ELECTRICAL CENTER 1 WHT WIRE

1995 VFTC A/C COMPRESSOR CLUTCH COIL A/C COMPRESSOR CLUTCH DIODE A/C COMPRESSOR RELAY (IN UNDERHOOD ELECTRICAL CENTER) A/C HEAD PRESSURE SWITCH (RIGHT SIDE OF ENGINE COMPARTMENT) A/C REQUEST RELAY CONTROL RELAY CONTROL RELAY CONTROL PRESS SW INPUT BLK WIRE BRN WIRE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM BAT FUSE ENGINE COOLING FAN MOTOR 1 ENGINE COOLING FAN MOTOR 2 FAN CONTROL RELAY 1 (IN UNDERHOOD ELECTRICAL CENTER) FAN CONTROL RELAY 2 (IN UNDERHOOD ELECTRICAL CENTER) GRY WIRE HOT AT ALL TIMES HOT IN RUN ENG EMIS FUSE LEFT ELECTRIC ACTUATOR LT BLU WIRE MAXI FUSE 1 MAXI FUSE 3 NCA WIRE ORG/ WIRE PASSENGER HEATER-A/C CONTROL SELECT SWITCH RED WIRE RED/BLK WIRE RIGHT ELECTRIC ACTUATOR SOLID STATE UNDERHOOD ELECTRICAL CENTER 1 WHT WIRE YEL WIRE

A/C HEAD PRESSURE SWITCH (RIGHT SIDE OF ENGINE COMPARTMENT) BLK WIRE BRN WIRE DK BLU WIRE DK GRN WIRE ECM BAT FUSE ENGINE COOLING FAN MOTOR 1 ENGINE COOLING FAN MOTOR 2 FAN CONTROL RELAY 1 (IN UNDERHOOD ELECTRICAL CENTER) FAN CONTROL RELAY 2 (IN UNDERHOOD ELECTRICAL CENTER) HOT AT ALL TIMES HOT IN RUN ENG EMIS FUSE LT BLU WIRE MAXI FUSE 1 MAXI FUSE 3 ORG/ WIRE PRES SW INPUT RED WIRE RED/BLK WIRE RELAY CONTROL RELAY CONTROL UNDERHOOD ELECTRICAL CENTER 1 WHT WIRE

1995 VFTC B/H CONN BLK WIRE BRN (OR PNK) WIRE BRN WIRE CHEVROLET CRUISE CONTROL MODULE (LEFT SIDE OF ENGINE COMPARTMENT, NEAR STRUT TOWER) CRUISE CONTROL RELEASE SWITCH (ON BRAKE PEDAL SUPPORT) CRUISE ENABLE CRUISE STATUS CRUISE FUSE CRUISE IND CRUISE INHIBIT TEST TERMINAL DK BLU WIRE DK GRN WIRE FUSE 15 FUSE 23 FUSE 39 FUSE BLOCK GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN, BULB TEST OR START INSTRUMENT CLUSTER (BUICK ONLY) MULTI-FUNCTION LEVER OFF ON CRUISE SWITCH R/A OFF ON R/A RESUME/ ACCEL SWITCH ORG/ WIRE PNK EX CHEVROLET WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (RIGHT SIDE OF ENGINE COMPARTMENT) SET SWITCH STOP LAMP/TORQUE CONVERTER CLUTCH SWITCH (ON BRAKE PEDAL SUPPORT) UNDERHOOD ELECTRICAL CENTER #1 (VIN L ONLY) UNDERHOOD ELECTRICAL CENTER 1 VIN M VIN X VIN L VSS OUTPUT WHT WIRE

1995 VFTC BLK WIRE BRN WIRE BUICK 2 DOOR BUICK 4 DOOR DK GRN WIRE FROM HEADLIGHT SWITCH FROM TURN SIGNAL SWITCH GRN WIRE HOT AT ALL TIMES R/CMPT REL FUSE LEFT BACK-UP LIGHT LEFT REAR SIDE MARKER LIGHT LEFT TAIL/TURN STOPLIGHTS LEFT TAILLIGHTS LICENSE LIGHT LICENSE LIGHT LICENSE LIGHT LT GRN WIRE O/D ORG/ WIRE RIGHT BACK-UP LIGHT RIGHT REAR SIDE MARKER LIGHT RIGHT TAIL/TURN STOPLIGHTS RIGHT TAILLIGHTS TRANSAXLE RANGE SWITCH (LEFT OF ENGINE, ON TRANSAXLE) UNDERHOOD ELECTRICAL CENTER 1 YEL WIRE

401 400 416 PPL 412 413 PPL 83 697 CRUISE CONTROL MODULE A/C CLUTCH RELAY A/C CLUTCH RELAY CONTROL MALFUNCTION IND CONTROL A/C ON IN A/C SENSOR (LEFT FRONT OF ENGINE COMPARTMENT) A/C SENSOR IN FUEL PUMP MOTOR FEED BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CANISTER PURGE CONTROL CONVENIENCE CENTER COOLANT TEMP SENSOR (TOP LEFT SIDE OF ENGINE BLOCK) CRUISE DISABLE SOL A CONTROL SOL B CONTROL SOL C CONTROL BATTERY BATTERY GROUND DATA LINK CONNECTOR (LOWER LEFT HUSH PANEL) DIGITAL EXHAUST GAS RECIRCULATION ASSEMBLY (TOP LEFT REAR OF ENGINE BLOCK) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM BAT FUSE ENG EMIS FUSE FUSE 39 ENGINE OIL LEVEL SENSOR EVAPORATIVE EMISSION CANISTER PURGE VALVE (TOP REAR OF ENGINE, ON INTAKE PLENUM) FAN CONTROL RELAY FAN RELAY CONTROL FAN RELAY CONTROL FUEL PUMP RELAY CTRL GRY WIRE HEATED OXYGEN SENSOR (REAR OF ENGINE, IN EXHAUST MANIFOLD) HEATER, A/C CONTROL ASSEMBLY HOT AT ALL TIMES HOT IN RUN HOT IN RUN, BULB TEST OR START IDLE AIR CTRL VALVE (TOP OF ENGINE ON FRONT OF THROTTLE BODY) INSTRUMENT CLUSTER LOW OIL INDIC INSTRUMENT CLUSTER SYSTEM INTAKE AIR TEMP SENSOR (LEFT FRONT OF ENGINE COMPT ON AIR CLEANER) LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MALFUNCTION INDICATOR MANIFOLD ABSOLUTE PRESSURE SENSOR (TOP REAR OF ENGINE) MAP SENSOR IN TPS SENSOR IN ECT SENSOR IN TRANS TEMP SENSOR IN NCA WIRE OIL LEVEL SENSOR IN SENSOR GROUND SENSOR GROUND SENSOR GROUND ORG/ WIRE ORG/BLK WIRE PARK/NEUTRAL OUT SERIAL DATA IN/OUT PNK WIRE PPL RED WIRE RED/BLK WIRE SECOND GEAR START REQUEST SENSOR GROUND BRAKES APPLIED IN PNP SWITCH IN SHIFT SOL A OUT SHIFT SOL B OUT TCC SOL OUT LOW OIL IND CTRL TCC CONTROL SOL A SOL B SOL C TAN WIRE TAN/BLK WIRE TAN/WHT WIRE THROTTLE POSITION SENSOR (REAR OF ENGINE, RIGHT SIDE OF THROTTLE BODY) UNDERHOOD ELECTRICAL CENTER 1 VEHICLE SPEED SENSOR (RIGHT REAR OF ENGINE ON TRANSAXLE) WHT WIRE YEL WIRE YEL/BLK WIRE

389 229 THEFT DETERRENT MODULE A/C COMP RLY 335 473 FAN CTRL #1 RELAY FAN CTRL #2 RELAY A/C COMPRESSOR CONTROLS A/C HEAD PRESSURE SWITCH A/C REQUEST INPUT AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CAMSHAFT REF INPUT FUEL CTRL REF IN GROUND SPARK REF IN MAF SENSOR IN COOLING FAN REQUEST CRUISE CONTROL MODULE CRUISE ENGAGED SIGNAL DATA LINK CONNECTOR DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE EGR 5 VOLT REF FUSED IGN FEED ENG EMIS FUSE F/INJN FUSE FUEL INJECTORS FUEL PUMP RELAY CTRL FUSED BATTERY FEED IAT GROUND GRY WIRE HOT IN RUN HOT IN RUN, BULB TEST OR START IDLE AIR CONTROL MOTOR (TOP LEFT SIDE OF ENGINE) IGN LINEAR EGR CTRL FUSED IGN FEED LINEAR EXHAUST GAS RECIRCULATION (EGR) VALVE (UPPER RIGHT SIDE OF ENGINE) LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MASS AIR FLOW SENSOR (TOP LEFT SIDE OF ENGINE) ORG/ WIRE PNK WIRE PNK/BLK WIRE PPL 400 401 VEHICLE SPEED SENSOR (RIGHT REAR OF ENGINE) PPL PPL/WHT WIRE RED/BLK WIRE SERIAL DATA LINE SHIFT A SOL SHIFT B SOL TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC ENABLE SOL TCC FUSE TCC PWM SOL TCC/PWM SOLENOID CTRL CRUISE DISABLE UNDERHOOD ELECTRICAL CENTER #1 ECM/ING FUSE UNDERHOOD ELECTRICAL CENTER 1 VSS INPUT HI VSS INPUT LO WHT WIRE YEL WIRE YEL/BLK WIRE

413 412 PPL BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK GRN/WHT WIRE ECM BAT FUSE ENG EMIS FUSE ENGINE COOLANT TEMP SENSOR (TOP LEFT SIDE OF ENGINE) EVAPORATIVE EMISSIONS CANISTER PURGE SOLENOID (TOP OF ENGINE ON INTAKE PLENUM) FUEL PUMP PRIME CONNECTOR FUEL PUMP RELAY (RIGHT SIDE OF ENGINE COMPT, FORWARD OF STRUT TOWER) FUEL PUMP/ OIL PRESSURE SENSOR SWITCH (RIGHT FRONT OF ENGINE NEAR OIL FILTER) FUEL TANK UNIT (TOP OF FUEL TANK) FUSE 39 FUSE BLOCK GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN, BULB TEST OR START INDICATOR INSTRUMENT CLUSTER "SERVICE ENGINE SOON" INTAKE AIR TEMP INPUT INTAKE AIR TEMP SENSOR (LEFT FRONT OF ENGINE COMPARTMENT) KNOCK SENSOR (REAR RIGHT SIDE OF ENGINE) LT BLU/BLK WIRE LT GRN WIRE ORG/ WIRE PARK/NEUTRAL POSITION SWITCH (LEFT REAR OF ENGINE, RIGHT TOP OF TRANSAXLE) PNK WIRE PPL PPL 1669 1668 PPL/WHT WIRE RED WIRE RED/BLK WIRE TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC BRAKE SWITCH INPUT TCC SOL. CTRL TCC/BRAKE SWITCH (BRAKE PEDAL SUPPORT) THROTTLE POSITION SENSOR (MOUNTED TO SFI UNIT) TRANS RANGE PARITY INPUT TRANS RANGE INPUT C TRANSAXLE SOL B CTRL TRANSAXLE SOL A CTRL TRANSMISSION TEMP SENSOR (AUTOMATIC TRANSAXLE) UNDERHOOD ELECTRICAL CENTER 1 WHT WIRE YEL WIRE YEL/BLK WIRE