Cadillac STS I facelift (2007-2011) serial data Wiring diagrams

1 PPL/ 5 LT 6 LT ANTENNA SIG AUDIO COMMON AUDIO SIG + AUDIO SIG RH TV BATT POSITIVE BATTERY BLK WIRE BLU WIRE BRN WIRE BRN/WHT WIRE CELLULAR, DIGITAL RADIO ANTENNA COAX COAX COAX COAX COAX COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM DIGITAL RADIO RECEIVER (RIGHT SIDE OF REAR PACKAGE SHELF) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DOWN VOL DRAIN WIRE GRN WIRE GROUND AUDIO COMMON GRY WIRE GRY/BLK WIRE LEFT STEERING WHEEL CONTROL SWITCH LH TV LO SPD GMLAN LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/WHT WIRE MUTE NCA WIRE ORG/ WIRE PERSONALIZATION PPL PPL 7 8 9 10 11 12 13 14 15 16 17 18 RED/WHT WIRE RETURN DRAIN WIRE RIGHT STEERING WHEEL CONTROL SWITCH SEEK SEEK UP SERIAL DATA SRCE TAN WIRE TELEVISION ANTENNA AMPLIFIER TELEVISION ANTENNA MODULE TELEVISION REAR GLASS ANTENNA VIDEO RGB LOW REF VOL UP VOLT W/ DIGITAL RADIO W/O DIGITAL RADIO WHT WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DRAIN WIRE LH AUDIO SIG RH AUDIO SIG ANTENNA SIG AUDIO COMMON AUDIO SIG + AUDIO SIG RH TV BATT POSITIVE BATTERY BLK WIRE CELLULAR, DIGITAL RADIO ANTENNA COAX COAX COAX COAX COAX COMPUTER DATA LINES SYSTEM DIGITAL RADIO RECEIVER (ON RIGHT SIDE OF PACKAGE SHELF) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DRAIN WIRE GROUND AUDIO COMMON GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES LEFT REAR FUSE BLOCK (UNDER LEFT SIDE OF REAR SEAT) LH TV LO SPD GMLAN SERIAL DATA LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/WHT WIRE NCA WIRE RED WIRE RED/WHT WIRE RETURN RF HTD/ SEAT/XM FUSE RIGHT REAR FUSE BLOCK (UNDER RIGHT SIDE OF REAR SEAT) SERIAL DATA TAN WIRE TELEVISION ANTENNA AMPLIFIER TELEVISION ANTENNA MODULE TELEVISION REAR GLASS ANTENNA TV/VICS/ AFS/SCM FUSE VIDEO RGB LOW REF VOLT W/ DIGITAL RADIO W/O DIGITAL RADIO WHT WIRE

2500 2500 9342 COMPUTER DATA LINES SYSTEM 2501 2501 1150 1787 830 873 COMPUTER DATA LINES SYSTEM 3.6L 42 55 2500 2501 SERIAL DATA BUS (+) SERIAL DATA BUS (-) 5727 342 345 883 885 872 1056 1337 COMPUTER DATA LINES SYSTEM ABS FUSE ABS IND. ABS MTR FUSE BLK WIRE BRAKE FLUID LEVEL SWITCH (IN MASTER CYLINDER RESERVOIR) BRAKE IND BRAKE PRESSURE MODULATOR VALVE (BPMV) BRK VAC PUMP RELAY BRN WIRE CAN BUS HI SERIAL DATA CAN BUS LO SERIAL DATA COMPUTER DATA LINES SYSTEM DK GRN WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY ELECTRONIC BRAKE CONTROL MODULE (EBCM) (RIGHT FRONT CORNER OF ENGINE COMPT) ENGINE CONTROL MODULE (ECM) (FRONT OF ENGINE, ON RIGHT VALVE COVER) GRN WIRE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT W/ PWR/TRN RELAY ENERGIZED BRK VAC PUMP FUSE IGN INSTRUMENT PANEL CLUSTER (IPC) LF WHEEL SPD SENS LOW REF LOGIC LT BLU WIRE LT GRN/BLK WIRE MOTOR CONTROL NCA WIRE ORG/ WIRE PPL RED/BLK WIRE SERIAL DATA SERIAL DATA (+) (1) SERIAL DATA (+) (1) BATTERY POSITIVE VOLT TAN WIRE TAN/BLK WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) VACUUM PUMP RLY CTRL VARIABLE EFFORT STEERING ACTUATOR (ON LEFT SIDE OF POWER STEERING GEAR) WHEEL SPD SENS LOW REF RF WHEEL SPD SENS SIGNAL RR WHEEL SPD SENS SIGNAL LR WHT WIRE YEL WIRE

ABS IND. BLK WIRE BLK/WHT WIRE BRAKE FLUID LEVEL SWITCH (IN MASTER CYLINDER RESERVOIR) BRAKE IND BRN WIRE CAN BUS CAN BUS HIGH LOW CAN BUS IGN CAN BUS HIGH LOW COMPUTER DATA LINES SYSTEM DK GRN WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY GRN WIRE HOT AT ALL TIMES HOT W/ RUN RELAY ENERGIZED IGN INSTRUMENT PANEL CLUSTER (IPC) J/C LEFT FRONT WHEEL SPEED SENSOR (WSS) (BEHIND LEFT FRONT BRAKE ROTOR) LEFT REAR FUSE BLOCK (UNDER LEFT SIDE OF REAR SEAT) LEFT REAR WHEEL SPEED SENSOR (WSS) (BEHIND LEFT REAR BRAKE ROTOR) LOGIC LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE PNK 4 3 2 1 IGN 1 VOLT CAN BUS HIGH CAN BUS LOW GND WIRE PNK 9 10 WIRE PNK LT WIRE PNK PNK WIRE PNK WIRE POWER STEERING CONTROL MODULE (PSCM) (LEFT SIDE OF DASH, ABOVE PARK BRAKE PEDAL) PPL RED/WHT WIRE RIGHT FRONT WHEEL SPEED SENSOR (WSS) (BEHIND RIGHT FRONT BRAKE ROTOR) RIGHT REAR WHEEL SPEED SENSOR (WSS) (BEHIND RIGHT REAR BRAKE ROTOR) RIM/RPA/ISRVM/CLM FUSE SERIAL DATA TAN WIRE TAN/WHT WIRE TRACTION OFF IND TV/VICS/ AFS/SCM FUSE WHT WIRE YAW, LATERAL ACCELEROMETER SENSOR YEL WIRE

BATTERY BLK WIRE BRN WIRE CHARGE IND COMPUTER DATA LINES SYSTEM CURRENT SENS LOW REF CURRENT SENS SIG DK GRN WIRE EXCEPT 3.6L 3.6L GENERATOR GENERATOR FIELD DUTY CYCLE SIG GENERATOR TURN ON SIG GRY WIRE HI SPD GMLAN SERIAL DATA BUS + INLINE FUSE GENERATOR (IN ENGINE HARNESS, NEAR GENERATOR) INSTRUMENT PANEL MODULE (IPM) (RIGHT SIDE OF DASH, BEHIND GLOVE BOX) LOGIC INSTRUMENT PANEL CLUSTER (IPC) LOW SPEED GMLAN SERIAL DATA ORG/ WIRE PNK CURRENT SENS SPLY VOLT WIRE POWER DISTRIBUTION SYSTEM RED WIRE SERIAL DATA STARTER MOTOR TAN WIRE TAN/BLK WIRE WHT WIRE

CAN BUS HIGH CAN BUS HIGH SERIAL DATA CAN BUS LOW CAN BUS LOW SERIAL DATA DK GRN WIRE HIGH SPEED GMLAN SERIAL DATA (+) HIGH SPEED GMLAN SERIAL DATA WAKE UP LT GRN/BLK WIRE LT GRN/WHT WIRE SERIAL DATA STEERING WHEEL SPEED/POSITION SENSOR (W/ ACTIVE BRAKE CONTROL) TAN WIRE TAN/BLK WIRE TAN/WHT WIRE W/ ACTIVE BRAKE CONTROL W/O ACTIVE BRAKE CONTROL YEL WIRE

8 6 627 606 LOW REFERENCE SUPPLY VOLTAGE 8 6 628 607 LOW REFERENCE SUPPLY VOLTAGE BLK WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE DRIVER DOOR CONTROL MODULE (DDM) (INSIDE DRIVER'S DOOR) DRIVER OUTSIDE REARVIEW MIRROR FEED HEATED MIRROR ELEMENT FRONT PASSENGER DOOR CONTROL MODULE (FPDM) (INSIDE PASSENGER'S DOOR) GMLAN SERIAL DATA GRY WIRE HOT AT ALL TIMES HVAC CONTROL MODULE (CENTER OF DASH, BELOW RADIO) LEFT REAR FUSE BLOCK RELAY (UNDER LEFT SIDE OF REAR SEAT) NCA WIRE ORG/ WIRE PASSENGER OUTSIDE REARVIEW MIRROR FEED PPL REAR DEFOG FUSE REAR DEFOG RELAY REAR DEFOGGER INDICATOR REAR DEFOGGER LOGIC SWITCH REAR INTEGRATION MODULE (RIM) (IN LEFT SIDE OF REAR COMPT, UNDER REAR SHELF) REAR WINDOW DEFOGGER RELAY CONTROL RIGHT REAR FUSE BLOCK (UNDER RIGHT SIDE OF REAR SEAT) RTN RTN HEATED MIRROR ELEMENT RUN IGN 3 VOLT RUN WIRE SERIAL DATA WHT WIRE

1 3 2 SENSOR SIGNAL SUPPLY VOLTAGE LOW REFERENCE 2 3 1 LOW REFERENCE SUPPLY VOLTAGE SENSOR SIGNAL 2 3 4 5 6 BATT POSITIVE VOLT SERIAL DATA SERIAL DATA GND GND 24 2525 BACKUP LAMP FEED REAR PARKING DIAGNOSTIC SIG 4 2 5 SERIAL DATA BATT POSITIVE VOLT GND 850 1339 GROUND IGN 1 VOLTAGE PNK WIRE BCK/UP LAMP FUSE BCK/UP LAMP RELAY BLK WIRE BRN WIRE CENTER AMBER IND CENTER AMBER IND CTRL LEFT AMBER IND CTRL COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DRIVER DOOR CONTROL MODULE (INSIDE DRIVER'S DOOR) DRIVER OUTSIDE REARVIEW MIRROR FASCIA) GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT W/ RUN/CRNK RELAY ENERGIZED IND J/C LED SIG LEFT AMBER IND LEFT REAR CORNER OBJECT ALARM SENSOR (ON LEFT REAR CORNER OF REAR LEFT REAR FUSE BLOCK (UNDER LEFT SIDE OF REAR SEAT) LEFT REAR MIDDLE OBJECT ALARM SENSOR (ON LEFT REAR MIDDLE OF REAR FASCIA) LEFT SIDE OBJECT SENSOR (ON LEFT REAR OF VEHICLE) LT BLU WIRE LT GRN WIRE MIDDLE OBJECT SENSOR CONNECTOR) NAVIGATION CIRCUIT ORG/ WIRE PASSENGER DOOR CONTROL MODULE (INSIDE PASSENGER'S DOOR) PASSENGER OUTSIDE REARVIEW MIRROR PNK WIRE PPL REAR INTEGRATION MODULE (RIM) (IN LEFT SIDE OF REAR COMPT, UNDER REAR SHELF) REAR OBJECT SENSOR CONTROL MODULE REAR PARKING ASSIST (RPA) DISPLAY REAR PARKING ASSIST CHIME SIG RED IND CTRL WIRE RED WIRE RED/WHT WIRE REVERSE RELAY COIL FEED RIGHT REAR CORNER OBJECT ALARM SENSOR (ON RIGHT REAR CORNER OF REAR FASCIA) RIGHT REAR FUSE BLOCK RIGHT REAR MIDDLE OBJECT ALARM SENSOR (ON RIGHT REAR MIDDLE OF REAR FASCIA) RIGHT SIDE OBJECT SENSOR (ON LEFT REAR OF VEHICLE) RIM/RPA/ ISRVM/CLM FUSE RT TRN/ SBZA FUSE SERIAL DATA VEHICLE SPEED SIG WHT WIRE YEL WIRE

5060 640 5060 640 351 COMPUTER DATA LINES SYSTEM AUTOMATIC DAY/ NIGHT MIRROR LOW REF AUTOMATIC DAY/ NIGHT MIRROR SIG AUTOMATIC DAY/NIGHT MIRROR BATT POSITIVE VOLTAGE BATT+ VOLT BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/BLK WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DDM FUSE DEFOGGER SYSTEM DK GRN WIRE DRIVER DOOR CONTROL MODULE (INSIDE DRIVER DOOR) DRIVER OUTSIDE REARVIEW MIRROR DRIVER WINDOW SWITCH FOLD MOTOR FRT PDM FUSE GMLAN GMLAN SERIAL DATA GROUND GRY WIRE HEATED MOTOR ELEMENT HORIZ MOTOR HOT AT ALL TIMES LEFT FOLDING MIRROR MOTOR EXTEND CONTROL LEFT FOLDING MIRROR MOTOR RETRACT CONTROL LEFT REAR FUSE BLOCK (UNDER LEFT SIDE OF REAR SEAT) LFT MIRROR MOTOR DN CTRL LFT MIRROR MOTOR LFT CTRL LFT MIRROR MOTOR UP/RT CTRL LOGIC LT BLU WIRE PASSENGER DOOR CONTROL MODULE (INSIDE PASSENGER'S DOOR) PASSENGER MIRROR MOTOR HORIZ/VER CTRL PASSENGER MIRROR MOTOR HORIZONTAL CTRL PASSENGER MIRROR MOTOR VERTICAL CTRL PASSENGER OUTSIDE REARVIEW MIRROR PPL/WHT WIRE RED WIRE RED/WHT WIRE RIGHT REAR FUSE BLOCK (UNDER RIGHT SERIAL DATA SIDE OF REAR SEAT) VERT MOTOR W/ INFOTAINMENT SYSTEM 010 W/ INFOTAINMENT SYSTEM 012/014/015 W/ POWER FOLDING MIRRORS WHT WIRE YEL WIRE

4.6L 3.6L A/T SHIFT LOCK CTRL SOLENOID AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION INTERNAL MODE SWITCH (IMS) AUTOMATIC TRANSMISSION SHIFT LEVER BRAKE PEDAL POSITION SENSOR (ATTACHED TO TOP OF BRAKE PEDAL ASSEMBLY) BRN WIRE COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY DK GRN WIRE DK GRN/WHT WIRE DK GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES INSTRUMENT PANEL MODULE (IPM) LEFT REAR FUSE BLOCK (UNDER LEFT SIDE OF REAR SEAT) LOGIC LOW REF NCA WIRE ORG/BLK WIRE P/N SIG RED WIRE RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (UNDER REAR SPEAKER SHELF) SENS SIG SERIAL DATA SHIFT LOCK CONTROL SHIFT PARK SUPPLY VOLTAGE SHIFT PARK SIGNAL THEFT/ SHFT FUSE TRANSMISSION CONTROL MODULE (TCM) GROUND WHT WIRE YEL WIRE YEL/BLK WIRE