Buick Century VI (1997-2005) blk/wht Wiring diagrams

1750 1550 GRD GRD 377 1872 REMOTE KEYLESS ENTRY CIRCUIT EXTERIOR LIGHTS SYSTEM 443 806 1500 238 PPL PPL 737 10 1571 INTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM ANTI-LOCK BRAKES SYSTEM BCM ACC FUSE BCM POWER FUSE BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) BRN WIRE BRN/WHT WIRE COURTESY LAMP LOW CTRL CRANK SIGNAL BCM, CLUSTER FUSE DK BLU WIRE DK BLU/WHT WIRE DOOR LOCK SWITCH- DRIVER DOOR LOCK SWITCH- FRONT PASSENGER DOOR LOCKS FUSE FUSE BLOCK- UNDERHOOD GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN ACC OR RUN HOT IN OFF, RUN OR START HOT IN RUN OR START I/P BLOCK BLOCK I/P FUSE BLOCK IGN 0: CLUSTER PCM, BCM FUSE IGNITION KEY ALARM SWITCH INADV POWER BUS FUSE KEY REMINDER SW SIG DRL MOD OUTPUT-PARK BRAKE LOW TIRE PRESS RESET SW SIG LOCK LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PARK BRAKE SWITCH (ON PARKING BRAKE ASSEMBLY) PCM, BCM U/H RELAY FUSE PNK WIRE POWER DISTRIBUTION SYSTEM PPL PPL/WHT WIRE RED/BLK WIRE REGAL SEAT BELT SWITCH (PART OF DRIVER'S SEAT BELT ASEMBLY) SERIAL DATA SIG PARK LAMP SW SIG-OFF TAN WIRE TAN/WHT WIRE TIRE RESET SWITCH TRUNK AJAR SW SIG HEADLAMP SW OUTPUT TRACTION CTRL SIG SW TRUNK RELEASE RLY FEED RAP RELAY CTRL HEADLAMP SW SIG UNLOCK WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) COMPUTER DATA LINES SYSTEM COURT LMPS FEED COURT LMPS ON DOOR OPEN INPUT DRIVER DR OPEN DK BLU WIRE DK BLU/WHT WIRE DRIVER DOOR LOCK FRONT PASSENGER DOOR LOCK HEADLAMP SWITCH DOME HOT AT ALL TIMES I/P COMPART- MENT LAMP/ SWITCH I/P FUSE BLOCK INADV POWER BUS FUSE LEFT COURTESY LAMP LEFT REAR DOOR LOCK LT GRN WIRE OFF LO HI ORG/ WIRE REGAL, CENTURY CUSTOM RIGHT COURTESY LAMP RIGHT REAR DOOR LOCK SERIAL DATA THEATER DIM 1 THEATER DIM (GRD) WHT WIRE

A/C CLU DIODE A/C COMPRESSOR CLUTCH AUTOMATIC TRANSMISSION AUXILIARY POWER OUTLET (CENTURY) AUXILIARY POWER OUTLET (REGAL) BATTERY BLK WIRE BLK/WHT WIRE BLOWER MOTOR CONTROL PROCESSOR BLOWER MOTOR RESISTOR ASSEMBLY CIGAR LIGHTER (CENTURY) ASHTRAY LAMP (CENTURY) CIGAR LIGHTER (REGAL) COOL FAN 2 RELAY DATA LINK CONNECTOR (DLC) ELECTRONIC BRAKE CONTROL MODULE ENG COMPT, AT BASE OF BATTERY) ENGINE OIL LEVEL SENSOR ENGINE OIL PRESSURE SWITCH F/PUMP RELAY FUSE BLOCK- UNDERHOOD HEATED OXYGEN SENSOR 2 HORNS I/P COMPARTMENT LAMP SWITCH IGN MAIN RELAY IGNITION CONTROL MODULE (ICM) IGNITION LOCK CYLINDER CONTROL ACTUATOR (REGAL) INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL LEFT AIR TEMPERATURE ACTUATOR LEFT CORNERING LAMP LEFT FOG LAMP (REGAL) LEFT HEADLAMP LEFT PARK/ TURN SIGNAL LAMP LEFT SIDE MARKER LAMP LEFT STEERING WHEEL CONTROLS MASS AIRFLOW (MAF) SENSOR NCA WIRE POWER DROP CONNECTOR POWERTRAIN CONTROL MODULE (PCM) RED WIRE REGAL RIGHT AIR TEMPERATURE ACTUATOR HVAC CONTROL MODULE RIGHT COOLING FAN HEATED OXYGEN SENSOR 1 RIGHT CORNERING LAMP RIGHT FOG LAMP (REGAL) RIGHT HEADLAMP RIGHT PARK/ TURN SIGNAL LAMP RIGHT SIDE MARKER LAMP RIGHT STEERING WHEEL CONTROLS WHT WIRE WINDSHIELD WASHER FLUID LEVEL SWITCH WINDSHIELD WASHER FLUID PUMP

3 CM FROM AUDIO AMPLIFIER (W/ AMP) AUTOMATIC HEADLAMP RELAY BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) BRAKE FLUID LEVEL SWITCH CENTER HIGH MOUNTED STOP LAMPS CRUISE CONTROL MODULE DRIVER INFORMATION DISPLAY SWITCH (REGAL) DATA LINK CONNECTOR (DLC) DRIVER SEAT HEATER CONTROL MODULE DRIVER SEAT ADJUSTER SWITCH DRIVER SEAT HEATER SWITCH PASSENGER SEAT HEATER SWITCH DRIVER WINDOW MASTER SWITCH DRIVER'S HEATED SEAT BACK ELEMENT DRIVER'S HEATED SEAT THERMISTER DRIVER SEAT BELT SWITCH EXC ONSTAR EXC ONSTAR ONSTAR FOG LAMP SWITCH (REGAL) GROUND (ON STEERING COLUMN) HEADLAMP DIMMER SWITCH HEADLAMP SWITCH IGNITION KEY ALARM SWITCH INSTRUMENT PANEL CLUSTER (IPC) LEFT FRONT DOOR LOCK LEFT FRONT DOOR LOCK SWITCH LEFT REAR DOOR LOCK (AJAR INDICATOR SWITCH) LEFT REAR PARK LAMP LEFT REAR PARK LAMP LEFT LICENSE LAMP LEFT ROOF RAIL COURTESY/ READING LAMP NCA WIRE ONSTAR OUTSIDE REMOTE CONTROL REARVIEW MIRROR SWITCH PASSENGER SEAT HEATER CONTROL MODULE PASSENGER'S HEATED SEAT BACK ELEMENT PASSENGER'S HEATED SEAT THERMISTOR PASSENGER SEAT ADJUSTER SWITCH RADIO RADIO ANTENNA MODULE REAR COMPARTMENT LID AJAR SWITCH REAR COMPARTMENT LID LOCK RELEASE ACTUATOR REAR COMPARTMENT LID RELEASE SWITCH REAR WDO ANTENNA FIXED ANTENNA REMOTE CONTROL DOOR LOCK RECEIVER RIGHT BACK-UP LAMP RIGHT LICENSE LAMP LEFT BACK-UP LAMP RIGHT FRONT DOOR LOCK (AJAR INDICATOR SWITCH) RIGHT FRONT DOOR LOCK SWITCH RIGHT FRONT WINDOW SWITCH RIGHT REAR DOOR LOCK (AJAR INDICATOR SWITCH) RIGHT REAR PARK LAMP RIGHT REAR PARK LAMP RIGHT ROOF RAIL COURTESY/ READING LAMP LEFT VANITY MIRROR LAMP RIGHT TAIL/ STOP/TURN SIGNAL LAMP RIGHT REAR SIDE MARKER LAMP FUEL PUMP RIGHT VANITY MIRROR LAMP INSIDE REARVIEW MIRROR SUNROOF MODULE TAN WIRE TIRE RESET SWITCH TRACTION CONTROL SWITCH (REGAL) INSTRUMENT PANEL CLUSTER (IPC) TURN SIGNAL/ HAZARD FLASHER MODULE VEHICLE COMMUNICATIONS INTERFACE MODULE W/ HEATED SEATS (PASS SEAT HARN, 20 CM FROM W/O HEATED SEATS WHT WIRE WIND- SHIELD WIPER MOTOR

AMBIENT LIGHT SENSOR (TOP RIGHT SIDE OF DASH) BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH) DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE DLC BREAKOUT) FOG LAMP RELAY FOG LAMP SWITCH FOG LP FUSE GRY WIRE HDLP L FUSE HDLP R FUSE HEAD HEADLAMP CNTRL FOG LP CNTRL HEADLAMP SW INPUT HEADLAMP DIMMER SWITCH HEADLAMP RELAY (BEHIND GLOVE BOX) HEADLAMP SWITCH HIGH BEAM HIGH BEAM INDICATOR HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) ILLUM INSTRUMENT PANEL CLUSTER LEFT FOG LAMP LEFT HEADLAMP LIGHT SENSOR SIG LIGHT SENS GRD REF PARK BRK SW IN LOW BEAM LP PARK FUSE LT BLU WIRE LT GRN/BLK WIRE OFF ORG/ WIRE ORG/BLK WIRE PARK PARK BRAKE SWITCH PNK PNK WIRE PNK WIRE PNK/BLK WIRE POWER DISTRIBUTION SYSTEM PPL PPL RIGHT FOG LAMP PPL/WHT WIRE RADIO,HVAC,RFA, CLUSTER CEL TEL FUSE RIGHT HEADLAMP TAN WIRE UNDERHOOD FUSE BLOCK UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT WIRE YEL WIRE YEL/BLK WIRE

1550 209 1036 PPL 1816 39 PNK WIRE 55 58 SPEED SENSOR SRL DATA 8 1500 893 PPL PNK WIRE AIR BAG IND ANTILOCK IND BCM BCM OR IPC SERIAL DATA BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) BRAKE FLUID LEVEL SWITCH (IN BRAKE FLUID RESERVOIR) BRAKE IND BRN/WHT WIRE CHANGE OIL IND. CHARGE IND CLUSTER FUSE CLUSTER LOGIC COOLANT TEMP IND CRANK SIGNAL BCM, CLUSTER FUSE CRUISE CONTROL SYSTEM CRUISE IND DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH, RIGHT OF STEERING COLUMN) DK BLU WIRE DK BLU/WHT (OR BLU) WIRE DK GRN WIRE DK GRN/WHT WIRE DOOR/TRUNK AJAR IND DRIVER INFORMATION DISPLAY SWITCH E/M EBCM ENGINE CONTROLS SYSTEM GROUND GRY WIRE HEADLIGHTS SYSTEM HIGH BEAM IND HOT AT ALL TIMES HOT IN HOT IN OFF, RUN OR START HOT IN RUN, BULB TEST OR START HVAC CONTROL MODULE I/P FUSE BLOCK IGN 01, BCM, PCM, CLUSTER FUSE IGNITION VOLTAGE ILLUMINATION (5 BULBS) INSTRUMENT CLUSTER LEFT TURN IND LOW COOLANT IND LOW FUEL IND LOW OIL IND LOW OIL PRESSURE IND LOW TIRE IND LOW TRAC IND LOW WASHER IND LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MODE PNK WIRE ORG/ WIRE PCM PCM CLASS 2 SERIAL DATA PCM, ABS BCM, CLUSTER LOGIC SERIAL DATA PERF SHIFT IND PNK WIRE POWERTRAIN CONTROL MODULE (LEFT FRONT SIDE OF ENGINE COMPT, IN AIR CLEANER ASSY) PPL RADIO, HVAC, RFA, CLUSTER, CEL TEL FUSE RESET+ RIGHT TURN IND RIGHT TURN SIGNAL GND SEAT BELT IND SECURITY IND SERIAL DATA SERVICE VEHICLE SOON IND SPEEDO- METER GAUGE TACHO- METER GAUGE SPLICE PACK SRL DATA TRAC OFF IND TRIP RESET INPUT TRIP RESET SWITCH VEHICLE SPEED LEFT TURN SIGNAL GND VF DISPLAY WHT WIRE YEL WIRE

1500 540 PPL IGNITION POWER POWER (BATTERY) 1746 1745 453 FUEL INJ 3 CONTROL FUEL INJ 2 CONTROL REF LOW 83 845 CRUISE DISABLE OUTPUT FUEL INJ 5 CONTROL BLK WIRE BLK/WHT WIRE BRN/WHT WIRE CAMSHAFT POSITION SENSOR (CMP) (FRONT OF ENG, BELOW INTAKE PLENUM) COOLING FAN SYSTEM CRANKSHAFT POSITION CRANKSHAFT POSITION (CKP) CRUISE CONTROL SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECM FUSE 22 ELEK IGN FUSE 25 ENG EMIS FUSE 30 EVAP CAN PURGE CONTROL F/INJR FUSE 28 FUEL INJ 6 CONTROL A/C PRESS RETURN GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN OFF, RUN BULB TEST, OR START HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH, IN RIGHT DOOR OPENING) IGN 0 FUSE IGNITION AMPLIFIER AND SWITCHING MODULE IGNITION CONTROL MODULE (TOP RIGHT SIDE OF ENG) KNOCK SENSOR (KS) BANK 1 (LEFT SIDE LOWER ENG, ABOVE STARTER) LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MAP SENSOR MAP/ECT SENSOR SIGNAL PCM GROUND IAT SENSOR GROUND (PIN 14-15 NOT USED) ORG/ WIRE ORG/BLK WIRE PNK 2 3 4 WIRE PNK 5 6 WIRE PNK PNK PPL 8 9 10 11 12 WIRE PNK WIRE PNK/BLK WIRE PPL PPL 772 492 (PIN 66-67 NOT USED) PPL/WHT WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE SENSOR RETURN SPARK PLUGS SPLICE PACK TAN/BLK WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT WIRE YEL WIRE YEL/BLK WIRE

AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION FLUID PRESSURE MANUAL VALVE POSITION SWITCH BLK WIRE BLK/WHT WIRE BLU WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/ WHT WIRE DK GRN/WHT WIRE FUEL INJECTORS GRN WIRE GRY WIRE GRY/WHT WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE LT PPL ORG/BLK WIRE PNK 2 3 4 WIRE PNK 5 6 WIRE PNK PNK PPL 8 9 10 11 12 WIRE PNK WIRE PNK/BLK WIRE PPL PRESSURE CONTROL SOLENOID VALVE RED WIRE RED/BLK WIRE RED/WHT WIRE STOPLIGHT SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) TAN/WHT WIRE TRANSMISSION INTERNAL MODE SWITCH VEHICLE SPEED SENSOR (LOWER RIGHT SIDE OF ENG COMPT, ON TRANSAXLE) WHT WIRE YEL WIRE YEL/BLK WIRE

1 2 3 PNK WIRE A/C REFRIGERANT PRESSURE SENSOR (ON LEFT SIDE OF ENG COMPT, ON ACCUMULATOR) BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK GRN WIRE EXHAUST GAS RECIRCULATION (EGR) VALVE (TOP REAR OF ENG, NEAR THROTTLE BODY) FUEL TANK PRESSURE SENSOR (IN FUEL TANK) GENERATOR GRY WIRE GRY/BLK WIRE INSTRUMENT CLUSTER LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MALFUNCTION INDICATOR LAMP ORG/BLK WIRE PNK WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE TAN WIRE TAN/BLK WIRE TAN/WHT WIRE THROTTLE POSITION (TP) SENSOR (ON THROTTLE BODY ASSEMBLY) UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOLENOID 1174 85 CRUISE CONTROL SYSTEM 2-3 SHIFT SOLENOID 444 472 (PIN 47-48 NOT USED) 5 VOLT REF (PIN 31-32 NOT USED) 33 34 35 36 37 38 39 TPS REF TP SWITCH AIR CONDITIONING SYSTEM AUTO TRANSAXLE FLUID TEMPERATURE AUTOMATIC TRANSMISSION SENSOR BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CLUSTER FUSE CRANK SIGNAL FUSE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENG OIL LEVEL IND IN CRUISE STATUS EVAP CAN VENT SOL CONTROL FUEL PUMP RELAY CONTROL EGR VAL CONTROL MIL CONTROL F/PMP RELAY FUEL PUMP FUEL PUMP PRIME CONNECTOR FUEL TANK GEN TERMINAL L OUTPUT GRY WIRE GRY/BLK WIRE HEATED OXYGEN SENSOR 1 HEATED OXYGEN SENSOR 2 HOT AT ALL TIMES F/PMP FUSE 35 HOT IN HOT IN RUN, BULB TEST OR START IAC COIL "A" LOW IAC COIL A HIGH (PIN 8-9 NOT USED) PPL 10 11 IAC COIL B LOW IAT SENSOR SIGNAL LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE PNK WIRE PPL PPL FUEL LEVEL SENSOR PPL/WHT WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE SENSOR GROUND STARTING/ CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC PWM SOL VAL CONTROL TCC SOLENOID VALVE TFT SENSOR SIGNAL FUEL LEVEL SENSOR INPUT CKP SENS PPL TR SWITCH INPUT A ENG OIL PRESS SWITCH IN TRANS FUSE 26 OXY SEN FUSE 29 UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT WIRE YEL WIRE YEL/BLK WIRE