Cadillac CTS I (2002-2007) (in engine harness, approximately 18 cm from tcm connector) 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

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

1807 1807 PPL PPL 22 23 CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA 1807 1807 PPL PPL CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA 20 21 2500 2501 H SPEED GMLAN DATA BUS + H SPEED GMLAN DATA BUS - 24 PPL 26 PPL 25 PPL 3 2 5 1 6 4 PPL PPL PPL PPL PPL PPL 33 32 2501 2500 H SPEED GMLAN DATA BUS - H SPEED GMLAN DATA BUS + 5.7L A/T EXCEPT 5.7L AUDIO AMPLIFIER (LEFT SIDE OF TRUNK) BASE BLK WIRE BLK/WHT WIRE CLASS 2 SERIAL DATA LEFT HEADLAMP CLASS 2 SERIAL DATA RIGHT HEADLAMP DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) DIGITAL RADIO RECEIVER (LEFT SIDE OF REAR PACKAGE SHELF) DIM/ALDL FUSE DRIVER DOOR MODULE (ON LEFT DOOR, UNDER DOOR TRIM) DRIVER DOOR SWITCH ASSEMBLY (DDSA) DRIVER'S MEMORY SEAT MODULE (UNDER DRIVER'S SEAT) ELECTRONIC BRAKE CONTROL MODULE (EBCM) (AT RIGHT FRONT CORNER OF ENGINE COMPT) ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) EXCEPT 5.7L EXCEPT 5.7L PPL FRONT PASSENGER DOOR MODULE (ON RIGHT FRONT DOOR, UNDER DOOR TRIM PANEL) HOT AT ALL TIMES HVAC CONTROL MODULE (BEHIND CENTER OF DASH, BELOW RADIO) INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (UNDER CENTER CONSOLE) INSTRUMENT PANEL CLUSTER (IPC) LEFT REAR DOOR MODULE (UNDER DOOR TRIM PANEL) LT GRN WIRE LUXURY POWERTRAIN CONTROL MODULE PPL PPL CLASS 2 SERIAL DATA PPL PPL 1807 1807 11 8 CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL PPL 1807 1807 25 9 CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL PPL 1807 1807 CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL PPL 59 58 1807 1807 CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL PPL CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL PPL PPL PPL PPL PPL PPL PPL RADIO RADIO ANTENNA MODULE (ABOVE HEADLINER, NEAR REAR WINDOW) REAR INTEGRATION MODULE (RIM) (UNDER PACKAGE SHELF TRIM PANEL) RED WIRE RED/WHT WIRE RIGHT REAR DOOR MODULE (ON RIGHT REAR DOOR, UNDER DOOR TRIM PANEL) THEFT DETERRENT CONTROL MODULE (AT TOP OF STEERING COLUMN) TRANSMISSION CONTROL MODULE (TCM) (AT RIGHT FRONT OF ENGINE COMPT) TV ANTENNA MODULE UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) W/ AUTOMATIC HEADLAMPS CONTROL LEVELING SYSTEM WHT WIRE WHT/BLK WIRE