Cadillac CTS I (2002-2007) (on right body rail, near right headlamp) Wiring diagrams

5 9 25 PNK PPL PPL WIRE BLK WIRE BLK/WHT WIRE BRAKE PEDAL POSITION SENSOR (NEAR TOP OF BRAKE PEDAL) BRN WIRE BRN/WHT WIRE CLUTCH PEDAL POSITION (CPP) SENSOR (M/T) COMPUTER DATA LINES SYSTEM CRUISE CONTROL SWITCH CRUISE INDICATOR DK GRN WIRE ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN OR START HTR VLV/ CLTCH FUSE STRG CTLS FUSE IGN 1 RELAY IGNITION CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA INSTRUMENT PANEL CLUSTER (IPC) LOGIC MAIN RELAY ON OFF ORG/ WIRE PNK PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL/ PPL/ PPL/ R/A TAN WIRE TCM/ IPC FUSE THROTTLE ACTUATOR CONTROL (TAC) MOTOR THROTTLE BODY ASSEMBLY THROTTLE POSITION (TP) SENSOR TOS FUSE TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (M/T) (ON RIGHT REAR OF TRANSMISSION) WHT WIRE YEL WIRE

5 9 25 PNK PPL PPL WIRE BLK WIRE BLK/WHT WIRE BRAKE PEDAL POSITION SENSOR (NEAR TOP OF BRAKE PEDAL) BRN WIRE BRN/WHT WIRE CLUTCH PEDAL POSITION (CPP) SENSOR (M/T) COMPUTER DATA LINES SYSTEM CRUISE CONTROL SWITCH CRUISE INDICATOR DK GRN WIRE ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN OR START HTR VLV/ CLTCH FUSE STRG CTLS FUSE IGN 1 RELAY IGNITION CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA INSTRUMENT PANEL CLUSTER (IPC) LOGIC MAIN RELAY ON OFF ORG/ WIRE PNK PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL/ PPL/ PPL/ R/A TAN WIRE TCM/ IPC FUSE THROTTLE ACTUATOR CONTROL (TAC) MOTOR THROTTLE BODY ASSEMBLY THROTTLE POSITION (TP) SENSOR TOS FUSE TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (M/T) (ON RIGHT REAR OF TRANSMISSION) WHT WIRE YEL WIRE

20 21 822 821 VSS LOW SIGNAL VSS HIGH SIGNAL ANTI-LOCK BRAKES SYSTEM B+ LOGIC BLK WIRE BRAKE PEDAL POSITION SENSOR (NEAR TOP OF BRAKE PEDAL) BRN WIRE BRN/WHT WIRE CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA IGNITION CLUTCH PEDAL POSITION (CPP) SENSOR (M/T) COAST COMPUTER DATA LINES SYSTEM CRUISE CONTROL SWITCH FUSE CRUISE INDICATOR CRUISE SWITCH DK BLU WIRE DK GRN WIRE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN OR START HTR VLV/ CLTCH FUSE STRG CTLS FUSE IGN 1 RELAY INSTRUMENT PANEL CLUSTER (IPC) LOGIC LT GRN WIRE ORG/ WIRE PNK PNK PNK PNK WIRE PNK PNK WIRE PNK POWER DISTRIBUTION SYSTEM WIRE PNK TP SENS 2 SIG LOW REF WIRE PNK TP SENSOR 2 WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) PPL PPL PNK WIRE PPL PPL PNK 9 25 5 WIRE PPL/WHT WIRE RESUME/ ACCEL RIGHT STEERING WHEEL CONTROLS SET- STEERING COLUMN FUSE BLOCK (TAPED TO STEERING COLUMN HARNESS) STEERING WHEEL CONTROL SWITCH FUSE TCM/ IPC FUSE THROTTLE ACTUATOR CONTROL (TAC) MODULE (RIGHT FRONT OF ENGINE COMPT) THROTTLE ACTUATOR CONTROL (TAC) MOTOR (RIGHT FRONT OF ENGINE COMPT) THROTTLE POSITION (TP) SENSOR (RIGHT SIDE OF THROTTLE BODY) TP SENS 1 SIG LOW ERF TAC MOTOR CTRL-2 TAC MOTOR CTRL-1 PPL TP SENSOR 1 UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (ON LEFT REAR OF TRANSMISSION) WHT WIRE YEL WIRE YEL/BLK WIRE

25 9 49 39 24 4 20 LOW REFERENCE A/C REFRIG PRESS SENSOR A/C CLUTCH RELAY CTRL 42 80 74 LOW SPEED FAN RELAY CTRL LOW REFERENCE ECT SENSOR SIGNAL 5.7L 65 33 MAIN RELAY CTRL HI SPEED FAN RELAY CTRL 7 23 LOW REFERENCE ECT SENSOR SIGNAL 80 14 43 LOW REFERENCE A/C REFRIG PRESS SENSOR A/C CLUTCH RELAY CTRL A/C REFRIGERANT PRESSURE SENSOR (NEAR THE LEFT FRONT STRUT TOWER) AMBIENT AIR TEMPERATURE SENSOR (UNDER FRONT BUMPER, NEAR FRONT GRILLE) BLK WIRE BRN WIRE COOLANT LEVEL SWITCH (IN LEFT FRONT CORNER OF COOLANT SURGE TANK) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) ENGINE CONTROLS SYSTEM ENGINE COOLANT LOW LEVEL EXCEPT 5.7L EXCEPT 5.7L 5.7L FEED GRY WIRE HI SPEED FAN RELAY HIGH FAN FUSE HOT AT ALL TIMES LEFT COOLING FAN (LEFT SIDE OF RADIATOR) LO SPEED FAN RELAY LOGIC LOW FAN FUSE LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE MAIN RELAY MAIN RELAY CTRL HI SPEED FAN RELAY CTRL LOW SPEED FAN RELAY CTRL MESSAGE CENTER ORG/ WIRE ORG/BLK WIRE POWERTRAIN CONTROL MODULE PPL RADIO RIGHT COOLING FAN (RIGHT SIDE OF RADIATOR) RTN S/P FAN RELAY SERIAL DATA SIG SPLICE PACK TAN WIRE UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPARTMENT) WHT WIRE YEL WIRE

24 4 20 MAIN RELAY CTRL HIGH SPEED FAN RELAY CTRL LOW SPEED FAN RELAY CTRL 2761 (OR 470) 410 42 80 74 LOW SPEED FAN RELAY CTRL LOW REFERENCE ECT SENSOR SIGNAL 5.7L 65 33 MAIN RELAY CTRL HIGH SPEED FAN RELAY CTRL 7 23 LOW REFERENCE ECT SENSOR SIGNAL BLK WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM COOLANT LEVEL SWITCH (IN LEFT FRONT CORNER OF COOLANT SURGE TANK) DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) ENGINE COOLANT LOW LEVEL EXCEPT 5.7L GRY WIRE HI FAN FUSE HI SPEED FAN RELAY HOT AT ALL TIMES HVAC CONTROL MODULE (BEHIND CENTER OF DASH, BELOW RADIO) LEFT COOLING FAN (LEFT SIDE OF RADIATOR) LO SPEED FAN RELAY LOGIC LOW FAN FUSE LT BLU WIRE LT GRN WIRE MAIN RELAY MESSAGE CENTER POWERTRAIN CONTROL MODULE (PCM) PPL PPL PPL SERIAL DATA SERIAL DATA COOLANT LEVEL SW RADIO RIGHT COOLING FAN (RIGHT SIDE OF RADIATOR) S/P FAN RELAY SERIAL DATA TAN WIRE UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPARTMENT) WHT WIRE YEL WIRE

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

BAS FUSE BAS RELAY BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/WHT WIRE CLASS 2 (DIM) LIGHTS ON IND CLASS 2 SERIAL DATA COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK DK EARLY PRODUCTION LATE PRODUCTION FROM UNDERHOOD FUSE BLOCK (DIMMING HOT AT ALL TIMES INSTRUMENT PANEL CLUSTER (IPC) JOINT CONNECTOR LEFT FRONT MARKER LAMP LEFT REAR MARKER LAMP LEFT TAIL/ STOP LAMP LEFT REAR TURN SIGNAL LAMP LEFT TAIL LAMP LEFT TAIL LAMP ASSEMBLY LEFT TURN INDICATOR LEFT TURN SIG IND LAMP SUPPLY VOLTAGE LOGIC LT BLU WIRE LT BLU/WHT WIRE LT PARK FUSE (DIAGRAM 1 OF 2) MESSAGE CENTER TURN SIGNAL ON THEFT ATTEMPTED MESSAGE REQUEST NEAR RIGHT HEADLAMP) (ON RIGHT BODY RAIL, NEAR RIGHT HEADLAMP) ORG/ WIRE PPL PPL (IN FORWARD LAMP HARNESS, 40 CM FROM HORN ASSEMBLY) PPL EARLY PRODUCTION PPL LATE PPL PRODUCTION W/ HID PPL LT RADIO RED WIRE RIGHT FRONT MARKER LAMP RIGHT FRONT PARK LAMP RIGHT HEADLAMP (W/O AUTOMATIC HEADLAMPS CONTROL LEVELING SYSTEM) RIGHT REAR MARKER LAMP RIGHT REAR TURN SIGNAL LAMP RIGHT TAIL LAMP RIGHT TAIL LAMP ASSEMBLY RIGHT TAIL/ STOP LAMP RIGHT TURN INDICATOR GROUND RIGHT TURN SIG IND LAMP SUPPLY VOLTAGE RT PARK FUSE TRAILERING (NOT USED) W/ HID W/O HID WHT WIRE

28 29 PNK WIRE 28 29 PPL BLK WIRE BLK/WHT WIRE BRN WIRE CANISTER VENT FUSE DK GRN WIRE DK GRN/WHT WIRE ECM FUSE FUEL PUMP MOTOR RELAY GRY WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT AT ALL TIMES FUEL PUMP MTR FUSE HOT IN ACC OR RUN HOT IN RUN OR START IGN 1 RELAY IGN MOD/ MAF FUSE IGNITION COIL 1 (TOP RIGHT OF ENGINE) IGNITION COIL 2 (TOP LEFT OF ENGINE) IGNITION COIL 3 (TOP RIGHT OF ENGINE) IGNITION COIL 4 (TOP LEFT OF ENGINE) IGNITION COIL 5 (TOP RIGHT OF ENGINE) IGNITION COIL 6 (TOP LEFT OF ENGINE) LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/WHT WIRE MAIN RELAY NCA WIRE ODD INJ/ COIL FUSE TOS FUSE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PNK WIRE PNK/BLK WIRE POWER DISTRI- BUTION SYSTEM PPL PPL/WHT WIRE PRE 02/ CAM FUSE POST 02 FUSE EVEN INJ/ COIL FUSE ECM/TCM FUSE RED/WHT WIRE RIGHT REAR FUSE BLOCK (BELOW RIGHT REAR SEAT) SPARK PLUG TAN WIRE TAN/WHT WIRE TCM/ IPC FUSE THEFT FUSE UNDER HOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE

28 29 PNK WIRE 28 29 PPL BLK WIRE BLK/WHT WIRE BRN WIRE CANISTER VENT FUSE DK GRN WIRE DK GRN/WHT WIRE ECM FUSE FUEL PUMP MOTOR RELAY GRY WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT AT ALL TIMES FUEL PUMP MTR FUSE HOT IN ACC OR RUN HOT IN RUN OR START IGN 1 RELAY IGN MOD/ MAF FUSE IGNITION COIL 1 (TOP RIGHT OF ENGINE) IGNITION COIL 2 (TOP LEFT OF ENGINE) IGNITION COIL 3 (TOP RIGHT OF ENGINE) IGNITION COIL 4 (TOP LEFT OF ENGINE) IGNITION COIL 5 (TOP RIGHT OF ENGINE) IGNITION COIL 6 (TOP LEFT OF ENGINE) LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/WHT WIRE MAIN RELAY NCA WIRE ODD INJ/ COIL FUSE TOS FUSE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PNK WIRE PNK/BLK WIRE POWER DISTRI- BUTION SYSTEM PPL PPL/WHT WIRE PRE 02/ CAM FUSE POST 02 FUSE EVEN INJ/ COIL FUSE ECM/TCM FUSE RED/WHT WIRE RIGHT REAR FUSE BLOCK (BELOW RIGHT REAR SEAT) SPARK PLUG TAN WIRE TAN/WHT WIRE TCM/ IPC FUSE THEFT FUSE UNDER HOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE

BLK WIRE BRN WIRE BRN/WHT WIRE CANISTER VENT FUSE DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE ECM/TCM FUSE THEFT FUSE EVAPORATIVE EMISSION CANISTER PURGE SOLENOID VALVE (TOP LEFT FRONT OF ENGINE) FUEL LEVEL SENSOR FUEL PUMP MOTOR FUSE FUEL PUMP RELAY FUEL PUMP/ SENDER ASSEMBLY (IN FUEL TANK) GRY WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT IN RUN OR ACC HOT IN RUN OR START IGN 1 RELAY IGN MOD/ MAF FUSE LT BLU WIRE LT GRN WIRE MAIN RELAY MANIFOLD ABSOLUTE PRESSURE SENSOR ODD INJ/ COIL FUSE ECM FUSE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PNK 1 2 3 4 5 6 7 8 WIRE PNK WIRE PNK/BLK WIRE PRE 02/ CAM FUSE POST 02 FUSE EVEN INJ/ COIL FUSE RED/WHT WIRE RIGHT REAR FUSE BLOCK (BELOW RIGHT REAR SEAT) SECONDARY FUEL SENDER ASSEMBLY (LEFT SIDE OF FUEL TANK) TAN WIRE TCM/ IPC FUSE TOS FUSE TRANSMISSION FLUID TEMPERATURE SENSOR (IN TRANSMISSION) UNDER HOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) YEL WIRE YEL/BLK WIRE