Cadillac CTS I (2002-2007) (in right front of passenger compt, under dash, above steering column) Wiring diagrams

23 55 HI SPD GMLAN + HI SPD GMLAN - APPROXIMATELY AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE ELEC PRNDL FUSE ELECTRONIC PRNDL ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) GRY WIRE HOT WHEN MINI ACCESSORY RELAY ENERGIZED HVAC CONTROL MODULE (BEHIND CENTER OF DASH, BELOW RADIO) INSTRUMENT PANEL CLUSTER LT GRN WIRE ORG/BLK WIRE P/N P/N SIG PPL PPL PPL 1807 1807 SERIAL DATA SERIAL DATA PPL PPL 4 6 PPL PPL 5 8 PPL PPL PPL 24 26 25 PPL SERIAL DATA PPL/WHT WIRE RADIO REAR INTEGRATION MODULE (UNDER PACKAGE SHELF TRIM PANEL) SERIAL DATA SERVICE TRANSMISSION TRANS HOT IDLE ENGINE SPLICE PACK TAN/WHT WIRE TRANSMISSION INTERNAL MODE SWITCH TRS SIG A TRS SIG B TRS SIG C TRS SIG P UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) WHT WIRE YEL WIRE

23 55 HI SPD GMLAN + HI SPD GMLAN - APPROXIMATELY AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE ELEC PRNDL FUSE ELECTRONIC PRNDL ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) GRY WIRE HOT WHEN MINI ACCESSORY RELAY ENERGIZED HVAC CONTROL MODULE (BEHIND CENTER OF DASH, BELOW RADIO) INSTRUMENT PANEL CLUSTER LT GRN WIRE ORG/BLK WIRE P/N P/N SIG PPL PPL PPL 1807 1807 SERIAL DATA SERIAL DATA PPL PPL 4 6 PPL PPL 5 8 PPL PPL PPL 24 26 25 PPL SERIAL DATA PPL/WHT WIRE RADIO REAR INTEGRATION MODULE (UNDER PACKAGE SHELF TRIM PANEL) SERIAL DATA SERVICE TRANSMISSION TRANS HOT IDLE ENGINE SPLICE PACK TAN/WHT WIRE TRANSMISSION INTERNAL MODE SWITCH TRS SIG A TRS SIG B TRS SIG C TRS SIG P UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) WHT WIRE YEL WIRE

12 13 UART SER DATA UART SER DATA 15 14 UART SER DATA UART SER DATA 39 79 35 53 STARTE RLY COIL CTRL SKIP SHIFT SOL CTRL CCP SWITCH CCP SWITCH BLK WIRE BRN/WHT WIRE CLUTCH PEDAL POSITION SWITCH (ON CLUTCH PEDAL BRACKET) DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ECM FUSE GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START HTR/VLV CLUTCH FUSE IGN 1 RELAY INSTRUMENT PANEL CLUSTER LOGIC LOW REF PNK WIRE LT GRN WIRE LT GRN/BLK WIRE MAIN RELAY ORG/BLK WIRE PNK PNK PNK 30 29 28 WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) PPL PPL LOW REF PPL/WHT WIRE REVERSE LOCKOUT SOLENOID (LEFT REAR OF TRANSMISSION) SKIP SHIFT IND SKIP SHIFT SOLENOID (LEFT SIDE OF TRANSMISSION) SPLICE PACK STARTER FUSE STARTER RELAY STARTING/ CHARGING SYSTEM TAN WIRE THROTTLE ACTUATOR CONTROL MODULE (RIGHT FRONT OF ENGINE COMPT) THROTTLE POSITION SENSOR TRANSMISSION FLUID TEMPERATURE SENSOR (IN TRANSMISSION) UNDER HOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (ON LEFT REAR OF TRANSMISSION) WHT WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE BLK/WHT WIRE CLASS 2 SERIAL DATA DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) DOOR OPEN ENGINE CONTROL MODULE (ECM) (3.6L (VIN 7): FRONT OF RIGHT VALVE COVER) FRONT PASSENGER DOOR LATCH ASSEMBLY FRONT PASSENGER DOOR MODULE (ON RIGHT FRONT DOOR, UNDER DOOR TRIM PANEL) GROUND HVAC CONTROL MODULE (BEHIND CENTER OF DASH, BELOW RADIO) IGN INSTRUMENT PANEL CLUSTER (IPC) LOGIC LT GRN WIRE ORG/BLK WIRE POWERTRAIN CONTROL MODULE PPL PPL 5.7L 2.8L/3.6L PPL CLASS 2 SERIAL DATA PPL CLASS 2 SERIAL DATA DOOR OPEN SW SIG PPL PPL PPL PPL 1807 1807 CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL PPL 58 59 1807 1807 CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL PPL 8 11 CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL PPL PPL 1 2 3 4 5 6 7 PPL PPL PPL 6 1 2 PPL PPL PPL PPL 25 24 23 26 RADIO REAR COMPARTMENT LID RELEASE ACTUATOR (CENTER OF REAR COMPARTMENT LID) RIGHT REAR FUSE BLOCK SECURITY INDICATOR TAN/WHT WIRE TRUNK AJAR SWITCH SIGNAL TRUNK RELEASE MOTOR SUPPLY VOLTAGE

A/C COMPRESSOR CLUTCH A/C COMPRESSOR CLUTCH SOLENOID A/C COMPRESSOR TEMPERATURE SWITCH A/C DEF BLK WIRE BLK/RED WIRE BLOWER MOTOR (ON RIGHT SIDE OF HVAC MODULE) BLOWER MOTOR CONTROL PROCESSOR (ON LOWER LEFT SIDE OF BLOWER MOTOR) BLOWER MTR SPEED CTRL BLOWER MTR SUPPLY BLU WIRE COLD DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DRIVER AIR TEMPERATURE ACTUATOR (ON HVAC MODULE) DRY AIR TEMP SIGNAL GRY WIRE GRY/BLK WIRE HOT HOT AT ALL TIMES IGNITION SWITCH LOCK OFF LOGIC LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE LT PNK WIRE MIX MOTOR 1 MIX MOTOR 2 MODE ACTUATOR MODE ACTUATOR (ON LEFT SIDE OF HVAC MODULE) MODE VALVE SIGNAL NCA WIRE PASS AIR TEMP SIGNAL PASSENGER AIR TEMPERATURE ACTUATOR (ON HVAC MODULE) PNK WIRE PPL RUN WIRE SPLICE PACK TAN WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

14 43 80 A/C REFRIG PRESS SENS SIG A/C CLUTCH RELAY CTRL LOW REFERENCE 5.7L 9 49 25 A/C REFRIG PRESS SENS SIG A/C CLUTCH RELAY CTRL LOW REFERENCE A/C COMPRESSOR CLUTCH A/C COMPRESSOR CLUTCH SOLENOID A/C COMPRESSOR TEMPERATURE SWITCH A/C REFRIGERANT PRESSURE SENSOR (NEAR THE LEFT FRONT STRUT TOWER) BLK WIRE COMP CLUTCH FUSE COMP CLUTCH RELAY DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (3.6L: FRONT OF RIGHT VALVE COVER) ENGINE CONTROLS SYSTEM EXCEPT 5.7L FEED GRY WIRE HOT AT ALL TIMES IGNITION SWITCH LOCK OFF NCA WIRE ORG/BLK WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) RETURN RUN WIRE SIG SPLICE PACK TAN WIRE UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPARTMENT)

1807 1807 COMPUTER DATA LINES SYSTEM AUTO HEAD PARK BAS RLY BPP SIG BLK WIRE BRAKE PEDAL POSITION (BPP) SENSOR (NEAR TOP OF BRAKE PEDAL) BRN WIRE BRN/WHT WIRE CENTER HIGH MOUNTED STOP LAMP (CHMSL) LEFT LICENSE LAMP RIGHT LICENSE LAMP DIMMING FUSE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DRL LOW CTRL HAZARD SW SIG SUPPLY VOLTAGE CTRL PARK LAMP RLY CTRL FLASHER FUSE GRN WIRE HAZARD SWITCH HOT AT ALL TIMES HOT IN RUN OR START IGN 1 RELAY LEFT FRONT TURN SIGNAL/ FOG LAMP ASSEMBLY LEFT FRONT TURN SIGNAL LAMP LICENSE LAMP ASSEMBLY LOW REF LT BLU WIRE LT BLU/WHT WIRE LT GRN/BLK WIRE OFF ORG/ WIRE PARK LAMP RELAY PNK WIRE PNK/ DK WIRE RED WIRE RED/WHT WIRE RIGHT FRONT TURN SIGNAL/ FOG LAMP ASSEMBLY RIGHT FRONT TURN SIGNAL LAMP RIGHT TURN SIGNAL VOLTAGE RIGHT DRL/TURN SUPPLY VOL STRG CTLS FUSE SUPPLY VOLTAGE TO UNDERHOOD FUSE BLOCK (LT PARK FUSE, TURN SIGNAL/ MULTI-FUNCTION SWITCH TURN SIGNAL/HAZARD FLASHER MODULE UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) WHT WIRE YEL WIRE

6 SPD M/T OTHERS BLK WIRE BRN WIRE BRN/WHT WIRE CLASS 2 (DIM) CLASS 2 SERIAL DATA COMPARTMENT) COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE FLASH TO PASS SWITCH SIGNAL FOG LAMP FUSE FOG LAMP RELAY FOG LAMP RLY CTRL LO BEAM RLY CONTROL HI BEAM RLY CTRL COIL SPLY VOLT CTRL FRONT FOG LAMP IND FRONT FOG LAMP SWITCH GRY WIRE HEADLAMP RELAY CONTROL HI LOW HIGH BEAM IND HOT AT ALL TIMES HOT IN RUN OR START HVAC CONTROL MODULE (BEHIND CENTER OF DASH, BELOW RADIO) INSTRUMENT PANEL CLUSTER (IPC) LEFT FRONT FOG LAMP LEFT FRONT TURN SIGNAL/ FOG LAMP ASSEMBLY LOGIC LT BLU WIRE LT BLU/BLK WIRE M/T NCA WIRE ORG/ WIRE OTHERS 6 SPD M/T PARK HEAD HEAD OFF AUTO AUTO PARK OFF PNK WIRE PNK/WHT WIRE PPL PPL PPL RIGHT FRONT FOG LAMP RIGHT FRONT TURN SIGNAL/ FOG LAMP ASSEMBLY SUNLOAD SENSOR (TOP CENTER OF I/P, ON DEFROST GRILL) TAN WIRE TAN/WHT WIRE TURN SIGNAL/ MULTIFUNCTION SWITCH UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE WHT WIRE YEL WIRE