Buick Century VI (1997-2005) underhood fuse block (mounted to right strut tower) Wiring diagrams

1442 1442 251 251 BATTERY BATTERY GROUND GROUND ABS FUSE ABS FUSE 1 ANTI-LOCK FAIL IND BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) BRAKE FLUID LEVEL SWITCH (IN BRAKE FLUID RESERVOIR) BRAKE IND BRAKE PRESSURE MODULATOR VALVE BRN WIRE BRN/WHT WIRE CLUSTER FUSE DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH, RIGHT OF STEERING COLUMN) DELIVERED TORQUE DESIRED TORQUE DK GRN WIRE ELECTRONIC POWER STEERING SYSTEM GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH, IN RIGHT DOOR OPENING) INSTRUMENT PANEL CLUSTER LEFT FRONT WHEEL SPEED SENSOR LEFT REAR WHEEL SPEED SENSOR LOW TRAC IND LT BLU WIRE LT GRN WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK PNK WIRE PNK WIRE PPL PUMP MOTOR RED WIRE REGAL RIGHT FRONT WHEEL SPEED SENSOR RIGHT REAR WHEEL SPEED SENSOR SERIAL DATA SIGNAL SPLICE PACK STOP LAMP SW OUT STOP LAMP SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) STOP LAMPS FUSE STRNG VAR ASSIST MOTOR STRNG VAR ASSIST MOTOR TAN WIRE TAN/BLK WIRE TRAC OFF IND TRACTION CONTROL SWITCH UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) VENT TUBE WHT WIRE YEL WIRE

BCM GND BCM PWR FUSE BLK WIRE BODY CONTROL MODULE (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) CLUSTER FUSE CRANK RELAY II CRANK SIGNAL BCM, CLUSTER FUSE CRANK VOLTAGE PPL DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH, RIGHT OF STEERING COLUMN) DK GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN HOT IN OFF, RUN OR START HOT IN RUN OR START HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK IGN IGN 0: CLUSTER PCM, BCM FUSE IGN KEY RESISTOR PELLET IGN KEY SIG IGN REF LO IGNITION SWITCH INSTRUMENT PANEL CLUSTER KEY IN KEY OUT KEY-IN SIG LT GRN WIRE ORG/ WIRE PASS-KEY ENABLE SWITCH PCM BCM IGN RELAY FUSE PNK WIRE PPL PPL IGN (0) PPL/WHT WIRE SECURITY INDICATOR SERIAL DATA STARTER RLY CTRL STARTER SOLENOID TAN WIRE UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

BACK-UP LAMP RELAY (BEHIND LEFT SIDE OF DASH) BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH) DK BLU WIRE HOT AT ALL TIMES LEFT BACK-UP LAMP LT GRN WIRE MIRRORS SYSTEM (AUTOMATIC DAY/NIGHT MIRROR) ORG/ WIRE R/CMPT REL FUSE RIGHT BACK-UP LAMP UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER)

1 13 3 9 W/O GPS W/ GPS 16 5 5 4 W/O GPS BLK WIRE BRN WIRE GRN WIRE GRY WIRE HEADLIGHT SENSOR (MIRROR SIDE) HOT AT ALL TIMES HOT IN RUN HVAC FUSE I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH, IN RIGHT DOOR OPENING) INSIDE REARVIEW MIRROR (DAY-NIGHT) LOW REF LT GRN WIRE NCA WIRE OFF ON ORG/ WIRE OUTSIDE REARVIEW MIRROR LOW REF SIGNAL PARK/ NEUTRAL POSITON (PNP) SWITCH (ON TOP RIGHT REAR OF TRANSAXLE) PNK WIRE R/CMPT REL FUSE RESETS TO DAYTIME HIGH REFLECTIVITY IN REVERSE MIRROR ON SIGNAL SOLID STATE UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) W/ GPS W/ SUNROOF W/O SUNROOF W/O HEATED SEATS W/ HEATED SEATS

AMBIENT LIGHT SENSOR (TOP RIGHT SIDE OF DASH, AT BASE OF WINDSHIELD) B+ B- BLK WIRE BLU WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) BRN WIRE BRN/WHT WIRE CENTER HIGH MOUNTED STOPLAMP (CHMSL) CORN- ERING LAMP CORNERING LAMP DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DRL AMBIENT LIGHT GROUND REF DRL AMBIENT LIGHT SIGNAL FRT PARK LPS FUSE GRN WIRE GRY/BLK WIRE HAZARD HAZARD FUSE HEADLAMP RELAY (BEHIND GLOVE BOX, MOUNTED TO UNDERSIDE OF CROSS-CAR BEAM) HEADLAMP SWITCH HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) INSTRUMENT PANEL CLUSTER (IPC) LEFT LEFT HEAD- LAMP ASSEMBLY LEFT REAR MARKER LAMP LEFT REAR PARK LAMPS LEFT TAIL/ TURN SIGNAL/ STOP- LAMP LEFT TURN INDICATOR LEFT TURN SIGNAL LP PARK FUSE LT BLU WIRE LT BLU/WHT WIRE LT GRN/BLK WIRE LT LT LT PNK WIRE NCA WIRE NORMAL OFF ORG/ WIRE PARK PARK LAMP RELAY (BEHIND RIGHT SIDE OF DASH) PARK/ TURN SIGNAL LAMP PARK/ TURN SIGNAL LAMP SIDE MARKER LAMP PNK WIRE POWER DISTRIBUTION PPL RIGHT RIGHT HEAD LAMP ASSEMBLY RIGHT REAR MARKER LAMP RIGHT REAR PARK LAMPS REAR LICENSE LAMPS RIGHT TAIL/ TURN SIGNAL/ STOP- LAMP RIGHT TURN INDICATOR RIGHT TURN SIGNAL SIDE MARKER LAMP STOP LAMPS FUSE STOPLIGHT SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) TAIL LAMPS, LIC LAMPS FUSE TURN SIGNAL TURN SIGNAL/ HAZARD FLASHER MODULE (BELOW LEFT SIDE OF DASH) TURN SIGNAL/MULTIFUNCTION SWITCH) TURN SIGNALS, CORN LPS FUSE UNDERHOOD FUSE BLOCK UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT WIRE YEL WIRE YEL/BLK WIRE

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

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

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