Buick Century VI (1997-2005) ppl 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

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 BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) DATA CLSS 2 DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH, RIGHT OF STEERING COLUMN) DK BLU WIRE DK GRN WIRE E, C SER DATA GRY WIRE HOT AT ALL TIMES HVAC CONTROL MODULE I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH, IN RIGHT DOOR OPENING) INSTRUMENT PANEL CLUSTER LT BLU WIRE LT GRN WIRE ORG/ WIRE PPL RADIO RADIO, HVAC, RFA, CLUSTER, DATA LINK FUSE SPLICE VEHICLE COMMUNICATIONS INTERFACE MODULE (ON REAR OF LEFT REAR WHEELHOUSE) WHT WIRE

72 64 DISABLE OUTPUT VSS HIGH ANTI-LOCK BRAKES SYSTEM BLK WIRE BRN WIRE CRUISE CONTROL MODULE CRUISE CONTROL RELEASE SWITCH (ON BRAKE PEDAL BRACKET) CRUISE CONTROL SWITCH CRUISE FUSE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGAGE INPUT GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) INSTRUMENT PANEL CLUSTER OFF OFF ON ORG/ WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (FRONT LEFT SIDE OF ENGINE COMPT) PPL PPL VSS LOW R/A SET SW STOP LAMPS FUSE STOPLIGHT SWITCH (BRAKE PEDAL SUPPORT BRACKET) VEHICLE SPEED SENSOR (VSS) (ON TRANSAXLE RIGHT AXLE CASE EXTENSION) VSS VSS OUTPUT WHT WIRE YEL WIRE

BLK WIRE BRN WIRE DRIVER OUTSIDE REARVIEW MIRROR HEATED MIRROR FUSE HOT AT ALL TIMES HOT IN RUN HVAC CONTROL MODULE HVAC FUSE I/P FUSE BLOCK MIRROR DEFOGGER NCA WIRE ON IND. ON/OFF MOMENTARY DEFOGGER SWITCH ORG/ WIRE PASSENGER OUTSIDE REARVIEW MIRROR PPL PPL (I/P HARN, NEAR BLWR MOTOR) RADIO NOISE SUPPRESSOR (IN RIGHT "C" PILLAR) REAR DEFOG CIRCUIT BREAKER REAR WINDOW DEFOGGER SOLID STATE TIMER WHT WIRE

3.8L 3.1L A/C CLU DIODE A/C CLUTCH RELAY 15 A/C COMPRESSOR CLUTCH A/C REFRIGERENT PRESSURE SENSOR (AT LEFT FRONT STRUT TOWER, ON A/C LIQUID LINE) BLK WIRE BREAKOUT) BRN WIRE COOL FAN 1 FUSE COOL FAN 2 FUSE A/C CLUTCH FUSE 23 COOL FAN 1 RELAY COOL FAN 2 RELAY COOL FAN 3 RELAY DEFOGGER SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DRVR TEMP CTRL ENGINE CONTROLS SYSTEM FAN OFF INPUT A/C REQUEST SIG IGNITION DEFOGGER ON PASS TEMP CTRL GRY WIRE HIGH BLOWER FUSE HIGH BLOWER RELAY HOT AT ALL TIMES HOT IN RUN HVAC CONTROL MODULE HVAC FUSE I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) IGN IGN MAIN RELAY (CLOSED IN RUN OR START) INTERIOR LIGHTS GROUND BATTERY LAMP DIM SIG LEFT COOLING FAN BLOWER MOTOR (BEHIND RIGHT SIDE OF DASH, IN HVAC MODULE) LEFT COOLING FAN DIODE (3.1L) LOW BLOWER FUSE LT BLU WIRE NCA WIRE OFF LO ORG/ WIRE ORG/BLK WIRE POS PPL RDO, HVAC, RFA CLSTR, CEL TEL FUSE RED/BLK WIRE RIGHT AIR TEMPERATURE ACTUATOR (RIGHT SIDE OF HVAC MODULE) RIGHT COOLING FAN DIODE (3.1L) TAN WIRE UNDERHOOD FUSE BLOCK (RIGHT SIDE OF ENGINE COMPT, MOUNTED TO STRUT TOWER) WHT WIRE WHT/BLK 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 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