Cadillac CTS I (2002-2007) (rear of right cylinder head) Wiring diagrams

3.6L 646 1807 PPL 771 772 2501 2500 36 24 21 20 SIG B SIG C BUS - BUS + AUTOMATIC TRANSMISSION BACKUP LAMP SUPPLY VOLTAGE BACKUP LAMP SWITCH (M/T) BACKUP SW SIG BLK WIRE BLK/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE HOT AT ALL TIMES INSIDE REARVIEW MIRROR (ISRVM) LEFT BACK-UP LAMP RIGHT BACK-UP LAMP LEFT REAR FUSE BLOCK (BELOW LEFT REAR SEAT) LICENSE LAMP ASSEMBLY LT GRN WIRE REAR INTEGRATION MODULE (UNDER PACKAGE SHELF TRIM PANEL) RELAY CONTROL SERIAL DATA REV LAMP RELAY REVERSE LAMP FUSE SIG SIG A TAN/WHT WIRE TRANSMISSION CONTROL MODULE (TCM) (A/T) (AT RIGHT FRONT OF ENGINE COMPT) TRANSMISSION INTERNAL MODE SWITCH (IMS) WHT WIRE YEL WIRE

22 5 48 42 VEHICLE SPEED SIG ENGINE SPEED SIG SERIAL DATA FUEL LEVEL SENS SIG 5.7L BLK WIRE BLU WIRE BRN WIRE CLEAR DIC SIG CLR COMPUTER DATA LINES SYSTEM DIC BACK SIG BACK DK BLU WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (3.6L, 2.8L) (FRONT OF RIGHT VALVE COVER) ENGINE CONTROLS SYSTEM ENGINE OIL LEVEL/ ENGINE OIL LEVEL/ TEMPERATURE SENSOR (3.6L, 2.8L) (IN OIL PAN) ENGINE OIL PRESSURE (EOP) SENSOR (3.6L, 2.8L) (IN OIL FILTER HOUSING) ENGINE OIL PRESSURE (EOP) SENSOR (5.7L) EXCEPT 5.7L FUEL LEVEL SENS SIG FUEL LEVEL SENSOR FUEL LEVEL SENSOR TEMPERATURE SENSOR (5.7L) FUEL PUMP, SENSOR ASSEMBLY (IN FUEL TANK) GROUND GRY WIRE INFORMATION DN SW SIG INFO INFORMATION UP SW SIG LEFT STEERING WHEEL CONTROLS LOW REFERENCE LT BLU WIRE MESSAGE CENTER LOGIC MESSAGE REQUEST ORG/ WIRE ORG/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) (5.7L) PPL PPL COMPUTER DATA LINES SYSTEM PPL PPL RADIO SCROLL DIC SIG SECONDARY FUEL SENDER ASSEMBLY (LEFT SIDE OF FUEL TANK) SERIAL DATA STEERING WHEEL CONTROL ASSEMBLY SWITCH 1 SWITCH 2 SWITCH 3 SWITCH 4 TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TUNE/SEL VEHICLE SPEED SIGNAL 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

1057 469 LOW REF LOW REF 335 877 ENG COOL FAN RLY 1 CTRL ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/WHT WIRE CMP SEN SIG ECT SEN SIG ACC VOLTAGE 410 343 COOLING FANS SYSTEM CPP SW SIG DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE COOLANT TEMPERATURE SENSOR (FRONT OF LEFT CYLINDER HEAD) FUEL INJECTORS GRN WIRE GROUND 1668 1665 GROUND 1669 1664 GRY WIRE GRY/WHT WIRE KNOCK SEN SIG 1 KNOCK SEN SIG 2 CKP SEN SIG REQUEST TORQUE SIG UART SERIAL DATA UART SERIAL DATA KNOCK SENSOR LOW OIL LEVEL SW SIG LOW REF EXTENDED TRAVEL BRAKE SW LOW REF GROUND ANTI-LOCK BRAKES SYSTEM LOW REF GROUND LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PNK PCM IGN SUPPLY PCM BAT SUPPLY LOW REF WIRE PNK WIRE PNK/BLK WIRE PPL PPL PPL 1670 1666 PPL/WHT WIRE RED/WHT WIRE RLY COIL CTRL GROUND SKIP SHIFT SOL CTRL LOW REF STARTING/ CHARGING SYSTEM TAN WIRE TAN/WHT WIRE WHT WIRE YEL WIRE YEL/BLK WIRE

A/C REFRIGERANT PRESSURE SENSOR (NEAR LEFT FRONT STRUT TOWER) ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CAMSHAFT POSITION SENSOR CRANKSHAFT POSITION SENSOR CRUISE CONTROL SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE OIL LEVEL/TEMPER- ATURE SENSOR ENGINE OIL PRESSURE SENSOR GRY WIRE GRY/BLK WIRE GRY/WHT WIRE IGN IGN CTRL IGNITION COIL/MODULE 1 (TOP LEFT OF ENGINE) IGNITION COIL/MODULE 3 (TOP LEFT OF ENGINE) IGNITION COIL/MODULE 5 (TOP LEFT OF ENGINE) IGNITION COIL/MODULE 7 (TOP LEFT OF ENGINE) LOW REF LOW REF LOW REF PPL LOW REF PNK WIRE LT BLU WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PLUG PLUG SPARK PNK 1 2 3 4 5 6 7 8 WIRE PNK WIRE PNK/BLK WIRE PPL PPL 3 4 PPL LOW REF SET/COAST SIG RES/ACC SIG BAS RLY SUPP IGN 1 RED WIRE RED/WHT WIRE REF LO SPARK TAN WIRE TAN/WHT WIRE UART SER DATA UART SER DATA ON/OFF SIG GND WHT WIRE YEL WIRE YEL/BLK WIRE

A/C CLUTCH RLY CTRL REVERSE INHIBIT SOL CTRL EVAP CAN VENT VALVE CTRL MIL CTRL A/C REFRIG PRESS SEN SIG ALT TERM L AIR CONDITIONING SYSTEM ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE COOLING FANS SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE FUEL LEVEL SEN SIG FUEL LEVL SEN SIG (SECOND) FUEL PUMP RLY CTRL ENG SPEED (TACH) OUT SIG FUEL TANK PRESSURE SENSOR (IN FUEL TANK) GEN FIELD DUTY SIG GROUND GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HOT AT ALL TIMES IAT SEN SIG IGN CTRL 1 IGN CTRL 7 IGN CTRL 6 IGN CTRL 4 PPL IGN IGN CTRL IGNITION COIL/ MODULE 2 (TOP RIGHT OF ENGINE) IGNITION COIL/ MODULE 8 (TOP RIGHT OF ENGINE) IGNITION SWITCH INSTRUMENT PANEL CLUSTER LOCK OFF LOGIC SS VSS SPEED IND LOW REF LOW REF ENG OIL PRESS SEN SIG CRANK VOLTAGE LOW REF LOW REF LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MAF SEN SIG MAP SEN SIG HI SPD FAN RLY CTRL EVAP CAN PURGE SOL CTRL MALFUNCTION INDICATOR LAMP OIL TEMP + ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PLUG SPARK PNK WIRE PNK/BLK WIRE PPL PPL/WHT WIRE RED WIRE RED/WHT WIRE REF LO RUN WIRE SKIP SHIFT IND SOUND SYSTEMS SPARK PLUG SS LAMP CTRL ST RLY COIL SUPPLY STARTING/ CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TORQUE DELIVERED VEHICLE SPEED OUT TFT SEN SIG VSS REF LO VSS SIG HI WHT WIRE YEL WIRE YEL/BLK WIRE