Buick Century VI (1997-2005) hot in run, bulb test or start Wiring diagrams

AUTOMATIC TRANSAXLE AUTOMATIC TRANSAXLE FLUID PRESSURE MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSAXLE FLUID TEMPERATURE SENSOR AUTOMATIC TRANSAXLE INPUT SHAFT SPEED SENSOR AUTOMATIC TRANSMISSION BCM INSTRUMENT CLUSTER BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE, INSTRUMENT CLUSTER BRN WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ECM FUSE 22 ENG EMIS FUSE 30 ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR (TOP LEFT SIDE OF ENGINE) GRY WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT IN OFF, RUN OR START HOT IN RUN OR START HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) CLUSTER FUSE IGN 0 FUSE INSTRUMENT PANEL CLUSTER (IPC) LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MAP SENSOR ORG/ WIRE ORG/BLK WIRE PCM BCM IGN RELAY FUSE PNK WIRE POWERTRAIN CONTROL MODULE (LEFT SIDE OF ENGINE COMPT, IN AIR CLEANER ASSEMBLY) PPL PPL DATA LINK CONNECTOR (BELOW DASH, RIGHT SIDE OF STEERING COLUMN) PRESSURE CONTROL SOL RED WIRE RED/BLK WIRE SERVICE ENGINE SOON SPLICE STOP LAMP SWITCH (ON BRAKE PEDAL SUPPORT BRACKET) TCC/ BRAKE SWITCH TAN WIRE TCC PWM SOL 2-3 SHIFT SOL 1-2 SHIFT SOL TCC RELEASE THROTTLE POSITION SENSOR (ON THROTTLE BODY) TRANS FUSE 26 TRANSMISSION INTERNAL MODE SWITCH UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT FRONT STRUT TOWER) WHT WIRE YEL WIRE YEL/BLK WIRE

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

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

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

A/T SHIFT LOCK CONTROL SOLENOID AUTOMATIC TRANSMISSION BLK WIRE BRAKE TO SHIFT RELAY (LEFT OF I/P FUSE BLOCK) BTSI PARK LOCK FUSE COMPUTER DATA LINES SYSTEM DATA LINE DK GRN WIRE GRN WIRE GRY WIRE HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK (RIGHT SIDE OF DASH, IN RIGHT DOOR OPENING) ORG/ WIRE PNK WIRE RED WIRE SIG A SIG B SIG P SIG C STOPLAMP SWITCH (OPEN WHEN BRAKE PEDAL DEPRESSED) (ON BRAKE PEDAL SUPPORT) TAN WIRE TRANSMISSION INTERNAL MODE SWITCH 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

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