Cadillac STS I facelift (2007-2011) (on dash harness, under dashboard, near firewall grommet) Wiring diagrams

26 9 36 42 55 SENSOR SIG LOW REF SENSOR SIG SERIAL DATA + SERIAL DATA - 43 61 40 LOW REF OIL SW SIG AUTO ON BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM COURTESY LMP SW ON SIG DISPLAY DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DOOR OPEN SW SIG DRIVER DOOR CONTROL MODULE (INSIDE DRIVER'S DOOR) DRIVER DOOR LATCH (IN MIDDLE REAR OF DRIVER DOOR) ENG/ MET TRIP RESET ENGINE CONTROL MODULE (ECM) (FRONT OF ENGINE, ON RIGHT VALVE COVER) ENGINE CONTROLS SYSTEM GMLAN SERIAL DATA NIGHT VISION IMAGE UP SIG HUD SWITCH LOW REF GRN WIRE GROUND GROUND DISTRIBUTION SYSTEM GRY WIRE I/P DIMMER SW SIG I/P DIMMER SWITCH IMAGE DN BATTERY POSITIVE VOLT IMAGE DN IMAGE UP IMAGE UP INFO RESET INFO UP INFO DN INSTRUMENT PANEL MODULE (IPM) (RIGHT SIDE OF DASH, BEHIND GLOVE BOX) LEFT REAR DOOR CONTROL MODULE (INSIDE LEFT REAR DOOR) LEFT REAR DOOR LATCH (IN MIDDLE REAR OF PASSENGER DOOR) LO SPD GMLAN SERIAL DATA LOGIC LOGIC HEAD UP DISPLAY (HUD) LOW REF LOW SPD GMLAN DATA LT BLU WIRE LT BLU/BLK WIRE LT GRN/BLK WIRE NIGHT VISION IMAGE DOWN NIGHT VISION IMAGE DIMMING GROUND PARK BRAKE SWITCH (AT BASE OF BRAKE PEDAL) PK BRK SW SIG PNK WIRE PNK/ DK WIRE PNK/BLK WIRE RED/WHT WIRE TAN WIRE TAN/BLK WIRE TRIP A/B W/ HEAD UP DISPLAY WHT WIRE YEL WIRE

45 65 LOW REF TEMP SENSOR 45 9 44 SENSOR SIG LOW REF SENSOR SIG 5060 2384 5699 PNK WIRE 53 33 SERIAL DATA + SERIAL DATA - 60 24 40 OIL SW SIG LOW REF AUTO ON IMAGE UP BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM COURTESY LMP SW ON SIG DISPLAY DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DOOR OPEN SW SIG DRIVER DOOR CONTROL MODULE (INSIDE DRIVER'S DOOR) DRIVER DOOR LATCH (IN MIDDLE REAR OF DRIVER DOOR) ENGINE CONTROLS SYSTEM ENGINE OIL PRESSURE (EOP) SENSOR (ON LEFT SIDE OF ENGINE) GMLAN SERIAL DATA NIGHT VISION IMAGE UP SIG HUD SWITCH LOW REF GRN WIRE GROUND GROUND DISTRIBUTION SYSTEM (IN PASSENGER COMPT, BEHIND LEFT KICK PANEL) GRY WIRE I/P DIMMER SW SIG I/P DIMMER SWITCH IMAGE DN IMAGE DN BATTERY POSITIVE VOLT IMAGE UP INFO RESET INFO DN INFO UP INSTRUMENT PANEL MODULE (IPM) (RIGHT SIDE OF DASH, BEHIND GLOVE BOX) LEFT REAR DOOR CONTROL MODULE (INSIDE LEFT REAR DOOR) LEFT REAR DOOR LATCH (IN MIDDLE REAR OF PASSENGER DOOR) LO SPD GMLAN SERIAL DATA LOGIC LOGIC HEAD UP DISPLAY (HUD) LOW REF LOW SPD GMLAN DATA LT BLU WIRE LT BLU/BLK WIRE LT GRN/BLK WIRE NIGHT VISION IMAGE DOWN NIGHT VISION IMAGE DIMMING GROUND OIL SW SIG PARK BRAKE SWITCH (AT BASE OF BRAKE PEDAL) PK BRK SW SIG PNK/ DK PNK WIRE PNK/BLK WIRE RED/WHT WIRE TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRIP A/B TRIP RESET ENG/ MET W/ HEAD UP DISPLAY WHT WIRE YEL WIRE

45 65 LOW REF TEMP SENSOR 45 9 44 SENSOR SIG LOW REF SENSOR SIG 5060 2384 5699 PNK WIRE 53 33 SERIAL DATA + SERIAL DATA - 60 24 40 OIL SW SIG LOW REF AUTO ON IMAGE UP BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM COURTESY LMP SW ON SIG DISPLAY DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DOOR OPEN SW SIG DRIVER DOOR CONTROL MODULE (INSIDE DRIVER'S DOOR) DRIVER DOOR LATCH (IN MIDDLE REAR OF DRIVER DOOR) ENGINE CONTROLS SYSTEM ENGINE OIL PRESSURE (EOP) SENSOR (ON LEFT SIDE OF ENGINE) GMLAN SERIAL DATA NIGHT VISION IMAGE UP SIG HUD SWITCH LOW REF GRN WIRE GROUND GROUND DISTRIBUTION SYSTEM (IN PASSENGER COMPT, BEHIND LEFT KICK PANEL) GRY WIRE I/P DIMMER SW SIG I/P DIMMER SWITCH IMAGE DN IMAGE DN BATTERY POSITIVE VOLT IMAGE UP INFO RESET INFO DN INFO UP INSTRUMENT PANEL MODULE (IPM) (RIGHT SIDE OF DASH, BEHIND GLOVE BOX) LEFT REAR DOOR CONTROL MODULE (INSIDE LEFT REAR DOOR) LEFT REAR DOOR LATCH (IN MIDDLE REAR OF PASSENGER DOOR) LO SPD GMLAN SERIAL DATA LOGIC LOGIC HEAD UP DISPLAY (HUD) LOW REF LOW SPD GMLAN DATA LT BLU WIRE LT BLU/BLK WIRE LT GRN/BLK WIRE NIGHT VISION IMAGE DOWN NIGHT VISION IMAGE DIMMING GROUND OIL SW SIG PARK BRAKE SWITCH (AT BASE OF BRAKE PEDAL) PK BRK SW SIG PNK/ DK PNK WIRE PNK/BLK WIRE RED/WHT WIRE TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRIP A/B TRIP RESET ENG/ MET W/ HEAD UP DISPLAY WHT WIRE YEL WIRE

4.4L, 4.6L 3.6L BANK 1 SENSOR 1 CONNECTOR) BLK WIRE BLK/WHT WIRE CAN BUS HIGH SERIAL DATA CAN BUS LOW SERIAL DATA DK GRN WIRE ECM/ TCM SERIAL DATA WAKE UP ECM/TCM SERIAL DATA WAKE UP HEADLAMP LEVELING MODULE (LEFT SIDE OF HEADLAMP ASSEMBLY) HIGH SPEED GMLAN DATA WAKE UP HIGH SPEED GMLAN DATA WAKE UP CAN BUS HIGH SERIAL DATA HIGH SPEED GMLAN SERIAL DATA (+) HIGH SPEED GMLAN SERIAL DATA BUS + HIGH SPEED GMLAN SERIAL DATA WAKE UP LOW SPEED GMLAN SERIAL DATA LT GRN/BLK WIRE POWER STEERING CONTROL MODULE (LEFT SIDE OF DASH, ABOVE PARK BRAKE PEDAL) RED/WHT WIRE TAN WIRE TAN/BLK WIRE TAN/WHT WIRE W/ ACTIVE BRAKE CONTROL W/ AUTO ADAPTIVE CRUISE CONTROL W/ MAGNETIC RIDE CONTROL W/O ACTIVE BRAKE CONTROL W/O AUTO ADAPTIVE CRUISE CONTROL W/O AUTO W/ AUTO HEADLAMPS HEADLAMPS LEVELING LEVELING YEL WIRE YEL/BLK WIRE

AUDIO AMPLIFIER DIGITAL RADIO RECEIVER (ON RIGHT SIDE OF PACKAGE SHELF) DK GRN WIRE DRIVER DOOR CONTROL MODULE (DDM) (INSIDE DRIVER'S DOOR) DRIVER WINDOW SWITCH HEAD UP DISPLAY (HUD) HVAC CONTROL MODULE (CENTER OF DASH, BELOW RADIO) INFOTAINMENT SYSTEM INSTRUMENT PANEL CLUSTER (IPC) LEFT REAR DOOR CONTROL MODULE (INSIDE LEFT REAR DOOR) LOW SPEED GMLAN SERIAL DATA MEMORY SEAT MODULE (UNDER DRIVER SEAT) PASSENGER DOOR CONTROL MODULE (INSIDE PASSENGER'S DOOR) RADIO REAR INTEGRATION MODULE (RIM) (IN LEFT SIDE OF REAR COMPT, UNDER REAR SHELF) REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (UNDER REAR SPEAKER SHELF) RIGHT REAR DOOR CONTROL MODULE (RRDM) (INSIDE RIGHT REAR DOOR) TV ANTENNA MODULE (LEFT SIDE OF REAR SHELF)

ABS MTR FUSE ANTI-LOCK BRAKES SYSTEM BLK WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY INSTRUMENT PANEL CLUSTER (IPC) ECM/TCM/IGN FUSE GRY WIRE HIGH LOW GND SERIAL SERIAL DATA DATA HOT AT ALL TIMES HOT W/ RUN/ CRNK RELAY ENERGIZED ING 1 LOGIC LT GRN WIRE PNK IGN 1 VOLT GMLAN SERIAL DATA WIRE PNK WIRE RED WIRE RED/BLK WIRE TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) VARIABLE EFFORT STEERING ACTUATOR (IN LEFT REAR ENGINE COMPT, ON STEERING RACK) WHT WIRE

13 3 RR TURN SIGN SUPPLY VOL LR TURN SIGN SUPPLY VOL 3 1 4 2 INTERIOR BACK LIGHT LAMP SIGNAL SUPPLY VOLTAGE GROUND LIGHTS SYSTEM AUTO BLK WIRE BLK/WHT WIRE BLU WIRE BRAKE PEDAL POSITION SENSOR (ATTACHED TO TOP OF BRAKE PEDAL ASSEMBLY) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DK LT GMLAN SERIAL DATA GROUND DISTRIBUTION SYSTEM HAZARD SWITCH HOT AT ALL TIMES I/P MDL/ ALDL FUSE V/ CHECK FUSE INSTRUMENT PANEL CLUSTER (IPC) INSTRUMENT PANEL MODULE (IPM) (RIGHT SIDE OF DASH, BEHIND GLOVE BOX) LAMP LEFT LEFT FRONT REPEATER LAMP LEFT FRONT TURN SIGNAL LAMP LEFT LICENSE LAMP LEFT TURN SIGNAL IND LIC DIM FUSE LOGIC LT BLU WIRE LT BLU/WHT WIRE LT DK LT TRN/ LDW FUSE RIM FUSE MASTER LIGHTNING IND OFF PARK HEAD PARK LAMP RELAY PARK LAMP RLY CTRL POWER DISTRIBUTION SYSTEM REAR INTEGRATION MODULE (RIM) (IN LEFT SIDE OF REAR COMPT, UNDER REAR SHELF) RED WIRE RED/BLK WIRE RED/WHT WIRE RIGHT RIGHT FRONT REPEATER LAMP RIGHT FRONT TURN SIGNAL LAMP RIGHT LICENSE RIGHT REAR FUSE BLOCK (UNDER RIGHT SIDE OF REAR SEAT) RIGHT TURN SIGNAL IND TO UNDERHOOD FUSE BLOCK LT PARK FUSE, (DIAGRAM 2 OF 2) TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) W/ GPS 1, HID W/ HID WHT WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE DATA LINK CONNECTOR (DLC) DRIVER DOOR CONTROL MODULE DRIVER DOOR LATCH DRIVER DRIVER DOOR WINDOW HANDLE SWITCH DRIVER LEFT REAR DOOR DOOR LOCK CONTROL SWITCH MODULE HEATED STEERING WHEEL HEATED STEERING WHEEL CONTROL MODULE I/P DIMMER SWITCH IGNITION COIL 1 IGNITION COIL 2 IGNITION COIL 3 IGNITION COIL 4 IGNITION COIL 5 IGNITION COIL 6 INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL INSTRUMENT PANEL CLUSTER (IPC) INTERIOR REAR COMPARTMENT LID RELEASE SWITCH LEFT DRIVER REAR WINDOW WINDOW MOTOR MOTOR LEFT REAR DOOR LATCH LEFT REAR WINDOW SWITCH LEFT STEERING WHEEL CONTROL SWITCH NCA WIRE RIGHT STEERING WHEEL CONTROL SWITCH STEERING POWER WHEEL STEERING SPEED/ CONTROL POSITION MODULE SENSOR (PSCM) TURN SIGNAL/ MULTIFUNCTION SWITCH W/ ACTIVE BRAKE CONTROL WHT WIRE

12 24 21 FOG LAMP SW SIG HI BEAM SW SIG GMLAN SER DATA 13 23 22 14 FLASH TO PASS SW SIG HEADLAMP ON SIG SENTINEL DISPLAY SPLY VOLTAGE 7 3 PPL PWM SIG RLY CTRL AIR CONDITIONING SYSTEM AUTO BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE FOG LAMPS IND FRONT FOG LAMP SWITCH FUSE GMLAN SERIAL DATA GRY WIRE HI BEAM RELAY HIGH BEAM IND HOT AT ALL TIMES HVAC CONTROL MODULE (CENTER OF DASH, BELOW RADIO) I/BEAM FUSE INSIDE REARVIEW MIRROR (ISRVM) INSTRUMENT PANEL CLUSTER (IPC) INSTRUMENT PANEL MODULE (IPM) (RIGHT SIDE OF DASH, BEHIND GLOVE BOX) LEFT FRONT DASH SPEAKER CONNECTOR) LO BEAM RELAY LOGIC LOW FTP LOW REF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE LT LO BEAM FUSE OFF PARK HEAD ORG/ WIRE PNK/WHT WIRE PPL RED/WHT WIRE RT HI LT HI BEAM BEAM FUSE FUSE RT LO BEAM SENSOR SIG SER DATA SUNLOAD SENSOR (CENTER OF DASH, IN DEFROSTER GRILLE) TAN WIRE TAN/WHT WIRE TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) W/ HIGH INTENSITY DISCHARGE W/ INTELLIGENT HIGH BEAM CONTROL W/O HIGH INTENSITY DISCHARGE W/O INTELLIGENT HIGH BEAM CONTROL WHT WIRE WIPER/WASHER SYSTEM YEL WIRE

AUTO HEAD PARK OFF TURN SIGNAL/ MULTI-FUNCTION BACKLIGHT DIMMING CTRL BACKLIGHT LAMP CTRL BACKLIGHTING CONTROL BACKLIGHTING IND (8 BULBS) BATT POS VOLT BLK WIRE BLK/WHT WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE DRIVER DOOR CONTROL MODULE (INSIDE DRIVER'S DOOR) DRIVER DOOR LOCK SWITCH DRIVER WINDOW SWITCH EKM/I/P MDL FUSE GMLAN SERIAL DATA HOT AT ALL TIMES HVAC CONTROL MODULE (CENTER OF DASH, BELOW RADIO) I/P DIMMER SWITCH I/P MDL/ ALDL FUSE INSTRUMENT PANEL MODULE (IPM) (RIGHT SIDE OF DASH, BEHIND GLOVE BOX) INTERIOR REAR COMPARTMENT LID RELEASE SWITCH LIC DIM FUSE LOGIC INSTRUMENT PANEL CLUSTER (IPC) LT BLU WIRE LT BLU/BLK WIRE PARK LAMP RLY CTRL PASSENGER DOOR CONTROL MODULE (INSIDE PASSENGER'S DOOR) PASSENGER DOOR LOCK SWITCH PASSENGER WINDOW SWITCH PNK WIRE PNK/BLK WIRE POWER DISTRIBUTION SYSTEM PRK LAMP RELAY RADIO RED WIRE RED/WHT WIRE SPLICE PACK SWITCH UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) WHT WIRE YEL WIRE