Buick LeSabre VIII (2000-2005) computer data lines system Wiring diagrams

AUTOMATIC TRANSAXLE AUTOMATIC TRANSAXLE INTERNAL MODE SWITCH (IMS) BLK WIRE BLK/WHT WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE HOT AT ALL TIMES LEFT BACK-UP LAMP LT BLU WIRE LT GRN WIRE POWERTRAIN CONTROL MODULE (IN AIR CLEANER HOUSING) PPL PPL SERIAL DATA PPL SERIAL DATA PRK/REV FUSE REAR FUSE BLOCK (UNDER LEFT REAR SEAT) RED WIRE REVERSE LAMP RELAY REVERSE LP RLY CTRL RIGHT BACK-UP LAMP SERIAL DATA SPLICE PACK TR SW A TR SW B WHT WIRE YEL WIRE

BLK WIRE BLU WIRE CLASS 2 SERIAL DATA LINE COMPUTER DATA LINES SYSTEM DK BLU WIRE DOOR, BEHIND TRIM PANEL) DRIVER DOOR COURTESY LAMP GROUND GRY WIRE HOT AT ALL TIMES INT LP FUSE INT LP RELAY LEFT FOOT WELL COURTESY LAMP LEFT FRONT DOOR LOCK ACTUATOR LEFT FRONT DOOR OPEN INPUT LEFT REAR DOOR COURTESY LAMP LEFT REAR DOOR LOCK ACTUATOR LEFT REAR DOOR MODULE LEFT REAR DOOR OPEN INPUT ORG/ WIRE PPL REAR COMPARTMENT COURTESY LAMP REAR COMPARTMENT LID RELEASE ACTUATOR REAR FUSE BLOCK (UNDER LEFT REAR SEAT) RED WIRE RIGHT FRONT DOOR LOCK ACTUATOR RIGHT FRONT DOOR MODULE (RFDM) SIMPLE BUS INTERFACE (SBI) RIGHT FRONT DOOR OPEN INPUT RIGHT REAR DOOR LOCK ACTUATOR RIGHT REAR DOOR MODULE (RRDM) (IN RIGHT REAR DOOR) RIGHT REAR DOOR OPEN INPUT SIMPLE BUS INTERFACE (SBI) TAN WIRE TRUNK LID OPEN INPUT WHT WIRE

BLK WIRE BLK/WHT WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DASH INTEGRATION MODULE (DIM) (RIGHT SIDE OF DASH) DIMMER SWITCH DK GRN WIRE DRL RELAY FLASH TO PASS SWITCH FOG/ DRL FUSE GRN WIRE HDHI- BML FUSE HDHI- BMR FUSE HDLO- BML FUSE HDLO- BMR FUSE HDLP HI BM RELAY HDLP LO BM RELAY HEADLAMP BEAM SWITCH HEADLAMP DIMMER SWITCH HEADLAMP SWITCH HI LOW HOT AT ALL TIMES I/P FUSE INSTRUMENT PANEL INTEGRATION MODULE (BEHIND LEFT SIDE OF DASH) INTERIOR LAMP SWITCH LEFT HIGH BEAM HEAD- LAMP LEFT LOW BEAM HEAD- LAMP LIGHTS ON IND LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE ORG/ WIRE PK LP SWITCH PNK WIRE PNK/BLK WIRE PNK/WHT WIRE PPL PPL PPL PPL/WHT WIRE PRK LP RELAY REAR FUSE BLOCK (UNDER LEFT REAR SEAT) RIGHT HIGH BEAM HEAD- LAMP RIGHT LOW BEAM HEAD- LAMP SPLICE PACK TAN WIRE TWILIGHT DELAY SW UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) W/ CORNERING LAMPS WHT WIRE WIPER/ WASHER SYSTEM YEL WIRE YEL/BLK WIRE

BLK WIRE BLK/WHT WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DASH INTEGRATION MODULE (DIM) (RIGHT SIDE OF DASH) DIMMER SWITCH DK GRN WIRE DRL RELAY FLASH TO PASS SWITCH FOG/ DRL FUSE GRN WIRE HDHI- BML FUSE HDHI- BMR FUSE HDLO- BML FUSE HDLO- BMR FUSE HDLP HI BM RELAY HDLP LO BM RELAY HEADLAMP BEAM SWITCH HEADLAMP DIMMER SWITCH HEADLAMP SWITCH HI LOW HOT AT ALL TIMES HVAC CONTROL MODULE (BEHIND LEFT SIDE OF DASH) I/P FUSE INTERIOR LAMP SWITCH LEFT HIGH BEAM HEAD- LAMP LEFT LOW BEAM HEAD- LAMP LIGHTS ON IND LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE ORG/ WIRE PK LP SWITCH PNK WIRE PNK/BLK WIRE PNK/WHT WIRE PPL PPL PPL PPL/WHT WIRE PRK LP RELAY REAR FUSE BLOCK (UNDER LEFT REAR SEAT) RIGHT HIGH BEAM HEAD- LAMP RIGHT LOW BEAM HEAD- LAMP SPLICE PACK TAN WIRE TWILIGHT DELAY SW UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) W/ CORNERING LAMPS WHT WIRE WIPER/ WASHER SYSTEM YEL WIRE YEL/BLK WIRE

BATTERY BLK WIRE BLK/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM INSTRUMENT CLUSTER SYSTEM DIMMING DIMMING SIGNAL DK BLU WIRE DK GRN/WHT WIRE GROUND HEAD-UP DISPLAY (HUD) DIMMER SWITCH HEAD-UP DISPLAY (ON TOP LEFT SIDE OF DASH) HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE IGN 3 FUSE IGNITION IMAGE DOWN IMAGE UP INSTRUMENT CLUSTER CIRCUIT LF TURN SIGNAL LT BLU WIRE MOTOR DOWN FEED MOTOR UP FEED ORG/ WIRE PASS THROUGH GROMMET) POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER HOUSING) PPL DATA LINES PPL/WHT WIRE REAR FUSE BLOCK (UNDER LEFT REAR SEAT) RF TURN SIGNAL VEHICLE SPEED SIGNAL YEL WIRE

ABS IND CONTROL ABS IND. AIRBAG IND AIRBAG IND CONTROL BLK WIRE BLK/WHT WIRE BRAKE FLUID LEVEL SWITCH (IN MASTER CYLINDER RESERVOIR) BRAKE IND BRAKE IND CONTROL BRN/WHT WIRE CHECK OIL LEVEL IND CHECK OIL LEVEL IND CONTROL COMPUTER DATA LINES SYSTEM COOLANT TEMP IND COOLANT TEMP IND CONTROL CRUISE CONTROL SYSTEM CRUISE IND CRUISE IND CONTROL DATA LINES DATA LINES DK (BODY HARN, LEFT SIDE OF VEHICLE, 19.5 CM FROM PASS THROUGH GROMMET) DK (DASH HARN, 23.5 CM FROM INSTRUMENT CLUSTER PANEL) DK BLU WIRE DK GRN/WHT WIRE DRIVER INFORMATION CENTER (DIC) SWITCH ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT FRONT OF ENGINE COMPT) ENG/ MET FUEL GAUGE FUEL INFO GAUGE INFO GRN WIRE GROUND GROUND IGNITION BATTERY HEAD-UP DISPLAY CIRCUIT HI BEAM IN CONTROL HIGH BEAM IND HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE IGN 1 FUSE ILLUMINATION INSTRUMENT CLUSTER LEFT TURN LEFT TURN IND LT BLU WIRE MIL CONTROL ODO TRIP OIL PRESSURE IND OIL PRESSURE IND CONTROL ORG/ WIRE PARK BRAKE SWITCH (ON TOP OF PARK BRAKE PEDAL ASSEMBLY) PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER HOUSING) PPL PPL/ PPL/ PPL/ REAR FUSE BLOCK (UNDER LEFT REAR SEAT) RESET+ RIGHT TURN RIGHT TURN IND RIGHT TURN LEFT TURN IGNITION SEAT BELT IND SEAT BELT IND CONTROL SECURITY IND SECURITY IND CONTROL SERVICE ENGINE SOON IND SPEEDOMETER GAUGE TACH SIGNAL TACHO- METER TAN WIRE TEMPERATURE GAUGE TRACTION OFF IND TRACTION OFF IND CONTROL TRACTION ON IND UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) VOLT IND VOLT IND CONTROL VSS SIGNAL WHT WIRE WINDSHIELD WASHER FLUID LEVEL SWITCH (IN WINDSHIELD WASHER FLUID RESERVOIR) YEL WIRE

ABS IND CONTROL ABS IND. AIRBAG IND AIRBAG IND CONTROL BLK WIRE BLK/WHT WIRE BRAKE FLUID LEVEL SWITCH (IN MASTER CYLINDER RESERVOIR) BRAKE IND BRAKE IND CONTROL BRN/WHT WIRE CHECK OIL LEVEL IND CHECK OIL LEVEL IND CONTROL COMPUTER DATA LINES SYSTEM COOLANT TEMP IND COOLANT TEMP IND CONTROL CRUISE CONTROL SYSTEM CRUISE IND CRUISE IND CONTROL DK (BODY HARN, LEFT SIDE OF VEHICLE, 19.5 CM FROM PASS THROUGH GROMMET) DK (DASH HARN, 23.5 CM FROM INSTRUMENT CLUSTER PANEL) DK BLU WIRE DK GRN/WHT WIRE DRIVER INFORMATION CENTER (DIC) SWITCH ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT FRONT OF ENGINE COMPT) ENG/ MET ENG/MET SIGN FUEL GAUGE GRN WIRE GROUND GROUND IGNITION BATTERY HEAD-UP DISPLAY CIRCUIT HI BEAM IN CONTROL HIGH BEAM IND HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE IGN 1 FUSE ILLUMINATION INSTRUMENT CLUSTER LEFT TURN LEFT TURN IND LT BLU WIRE LT GRN WIRE MIL CONTROL OIL PRESSURE IND OIL PRESSURE IND CONTROL ORG/ WIRE PARK BRAKE SWITCH (ON TOP OF PARK BRAKE PEDAL ASSEMBLY) PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER HOUSING) PPL PPL PPL REAR FUSE BLOCK (UNDER LEFT REAR SEAT) RESET+ RIGHT TURN RIGHT TURN IND RIGHT TURN LEFT TURN IGNITION SEAT BELT IND SEAT BELT IND CONTROL SECURITY IND SECURITY IND CONTROL SERVICE ENGINE SOON IND SPEEDOMETER GAUGE TACH SIGNAL TACHO- METER TACHOMETER DATA LINES DATA LINES TEMPERATURE GAUGE TRACTION OFF IND TRACTION OFF IND CONTROL TRACTION ON IND TRIP RESET UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) VEHICLE SPEED BRAKE FLUID LVL PARK BRAKE WASHER FLUID LVL ABS IND VOLT IND VOLT IND CONTROL VSS SIGNAL WHT WIRE WINDSHIELD WASHER FLUID LEVEL SWITCH (IN WINDSHIELD WASHER FLUID RESERVOIR) YEL WIRE

AIR TEMPERATURE SWITCH ASSEMBLY BLK WIRE BLU WIRE CLASS 2 SERIAL DATA LINE CLASS 2 SERIAL DATA LINE INTERIOR LAMP SWITCH INPUT COMPUTER DATA LINES SYSTEM DASH INTEGRATION MODULE (DIM) (BEHIND RIGHT SIDE OF DASH, UNDER SOUND INSULATOR) DRIVER DOOR LOCK SWITCH MEMORY FUNCTION SWITCH (IF EQUIPPED) DRIVER WINDOW SWITCH DRIVER HEATED SEAT SWITCH (IF EQUIPPED) DRIVERS DOOR MODULE (UPPER RIGHT CORNER OF DOOR, BEHIND TRIM PANEL) FRONT PASSENGER POWER DOOR LOCK SWITCH FRONT PASSENGER POWER WINDOW SWITCH GRN WIRE GROUND HEADLAMP SWITCH I/P DIMMER SWITCH I/P DIMMER SWITCH INPUT INCADESCENT DIMMING OUTPUT INSTRUMENT CLUSTER (IPC) INTERIOR LAMP SWITCH OFF PNK/BLK WIRE PPL RADIO REAR INTEGRATION MODULE (RIM) (BEHIND UPPER LEFT REAR SEAT CUSHION) REF RIGHT FRONT DOOR MODULE (RFDM) SIMPLE BUS INTERFACE (SBI) RIGHT FRONT HEATED SEAT SWITCH (IF EQUIPPED) SENSOR RETURN SIMPLE BUS INTERFACE (SBI) CLASS 2 SERIAL DATA LINE TAN WIRE TWILIGHT DELAY SWITCH WHT WIRE YEL WIRE

283 284 SOLID STATE REAR VERT UP CTRL HORIZ BACKWARD CTRL BATTERY BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/ WHT WIRE BRN/WHT WIRE CLASS 2 DATA COMPUTER DATA LINES SYSTEM CONNECTOR DK BLU WIRE DK GRN WIRE DRIVER 1 DRIVER 1 INPUT DRIVER 2 EXIT DRIVER 2 INPUT DRIVER DOOR MODULE (INSIDE DRIVER'S DOOR) DRIVER DOOR SWITCH ASSEMBLY DRIVER SEAT ADJUSTER SWITCH DRIVER SEAT FRONT VERTICAL MOTOR DRIVER SEAT REAR VERTICAL MOTOR DRIVER SEAT HORIZONTAL MOTOR DRIVER SEAT LUMBAR HORIZONTAL MOTOR DRIVER SEAT LUMBAR VERTICAL MOTOR DRIVER SEAT LUMBAR SWITCH DRIVER SEAT RECLINE MOTOR DRIVER SEAT RECLINER POSITION SENSOR DRIVER SEAT REAR VERTICAL POSITION SENSOR FRONT UP DN FRT VERT UP CTRL LUMBAR FORWARD CTRL LUMBAR UP CTRL GRN WIRE GROUND GRY WIRE HOT AT ALL TIMES IN OUT LT BLU WIRE LT GRN WIRE MEM FUSE MEMORY PERSONALIZATION FUNCITON SWITCH MEMORY SEAT MODULE (UNDER DRIVER'S SEAT) NCA WIRE ORG/ WIRE PNK WIRE PPL PPL PPL CLASS 2 DATA CLASS 2 DATA PWR SEAT CIRCUIT BREAKER REAR FUSE BLOCK REAR UP BK REAR VERT UP CTRL RECLINE FORWARD CTRL RECLINE BACK CTRL RECLINE FWD DN RED WIRE SERIAL DATA SOLID STATE SOLID STATE SOLID STATE SPLICE PACK TAN WIRE TAN/WHT WIRE W/ HEATED SEATS WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

1744 808 FUEL INJ 1 CONTROL SENSOR RETURN (EOP) 400 401 PPL ANTI-LOCK BRAKE SYSTEM 43 44 FUEL INJ 6 CONTROL SHIFT SOL B CONTROL 46 47 48 FUEL INJ 4 CONTROL FUEL INJ 5 CONTROL REFERENCE LOW 772 492 TRANS RANGE SW B MAF SENSOR INPUT BLK WIRE BLK/WHT WIRE BLU WIRE BONNEVILLE LE SABRE BRN/WHT WIRE BYPASS CKP SYNC SIG CMP OUTPUT CMP SIGNAL COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM CRUISE CONTROL SYSTEM DESIRED TORQUE INPUT CRUISE DISABLE/INHIBIT FUEL INJ 2 CONTROL DIS FUSE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/ WHT WIRE DK GRN/WHT WIRE ECT SENSOR GROUND MAP SENSOR GROUND GROUND GRY WIRE HOT AT ALL TIMES HOT IN RUN, START IAC COIL B HIGH 39 40 41 42 IGN CONTROL IGN VOLTAGE IGNITION IGNITION BATTERY IGNITION CONTROL MODULE (ICM) (ON TOP LEFT FRONT OF ENG) IGNITION SWITCH (PIGTAILED FOR LE SABRE) INSTRUMENT CLUSTER SYSTEM (VEHICLE SPEED) KNOCK SENSOR (KS) BANK 2 (ON LOWER REAR OF ENG BLOCK, NEAR OIL FILTER) LOCK OFF LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MAP SENSOR +5 V MASS AIRFLOW (MAF) SENSOR (TOP OF THROTTLE BODY) NOT USED ORG/ WIRE ORG/BLK WIRE PCM GROUND IAT SENSOR GROUND PNK (OR PNK) WIRE PNK (OR PNK/BLK) WIRE PNK PNK 9 10 WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER HOUSING) PPL PPL PPL PPL TCC SWITCH INPUT EGR POS SENS GROUND EGR CONTROL GROUND PPL/WHT WIRE PURGE SOLENOID (TOP OF ENGINE) RED/BLK WIRE REF LOW RUN WIRE SHIFT SOL A CONTROL HI SPEED COOL FAN LO SPEED COOL FAN CMP INPUT TAN WIRE TAN/BLK WIRE TRANS FUSE UNDER- HOOD FUSE BLOCK PCM BATT FUSE VEHICLE SPEED SENSOR (RIGHT FRONT OF TRANSAXLE) EVAPORATIVE EMISSIONS CANISTER WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE