Cadillac CTS I (2002-2007) message center Wiring diagrams

5.7L 62 13 EXTENDED TRAVEL BRAKE SW SIG REQUESTED TORQUE SIGNAL 8 11 PPL PPL CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA ABS FUSE ABS INDICATOR SIG BAS RELAY COIL SUPPLY VOLTAGE BAS RLY COIL SUPPLY VOLTAGE BLK WIRE BPP SENSOR SIGNAL BRAKE PEDAL POSITION SENSOR (NEAR TOP OF BRAKE PEDAL) BRAKE PUMP MOTOR BRN WIRE COMPUTER DATA LINES SYSTEM DELIVERED TORQUE SIGNAL DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) EXCEPT 5.7L GROUND HIGH EFFORT CTRL LOW EFFORT CTRL GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN OR START IGN 1 RELAY LOGIC LOW REFERENCE 5 VOLT REFERENCE LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE MESSAGE CENTER MESSAGE REQUEST LOGIC NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK ABS FUSE WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) PPL RADIO RED/BLK WIRE REQUESTED TORQUE SIGNAL RIGHT REAR FUSE BLOCK (BELOW RIGHT REAR SEAT) SPLICE PACK TAN WIRE TAN/BLK WIRE THROTTLE ACTUATOR CONTROL (TAC) MODULE (RIGHT FRONT OF ENGINE COMPARTMENT) TRACTION CONTROL DATA SIG TRACTION CONTROL DATA SIGNAL CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL PPL TRACTION SUSPENDED SERVICE SUSPENSION SYS TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) VARIABLE EFFORT STEERING ACTUATOR (ON POWER STEERING GEAR INPUT SHAFT) W/ SOFT RIDE SUSPENSION SYSTEM 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

7 8 9 10 11 12 13 PPL BLK WIRE BLU WIRE COMPUTER DATA LINES SYSTEM DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) DK BLU WIRE DK GRN WIRE GRN WIRE GRY WIRE IGN INFLATABLE RESTRAINT FRONT END DISCRIMINATING SENSOR INFLATABLE RESTRAINT I/P MODULE (ABOVE GLOVE BOX) INSTRUMENT PANEL CLUSTER LOGIC LOGIC CLASS 2 LT GRN WIRE MESSAGE CENTER NCA WIRE ORG/ WIRE PASSENGER INFLATABLE RESTRAINT ROOF RAIL MODULE (ABOVE RIGHT "B" PILLAR) PASSENGER SEAT BELT PRETENSIONER (RIGHT SIDE OF DRIVER'S SEAT) PPL RADIO SERIAL DATA SERVICE AIR BAG SHORTING BAR SIR INDICATOR SPLICE PACK STAGE 1 STAGE 2 TAN WIRE TAN/ORG WIRE UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPARTMENT) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

11 3 PNK LOW REF DRIVER SIG WIRE 22 23 PPL PPL SERIAL DATA SERIAL DATA 8 11 PPL PPL AUDIO AMPLIFIER (LEFT SIDE OF TRUNK) LUXURY BASE AUTO HEAD BATTERY BLK WIRE BLK/WHT WIRE BRN/WHT WIRE CHECK TIRE PRESSURE, SERVICE MONITOR CLASS 2 (DIM) CLASS 2 (SDM) CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA DOOR AJAR SW SIGNAL LF DOOR SW SIG COMPUTER DATA LINES SYSTEM DIM/ALDL FUSE DOOR AJAR SIGNAL DOOR OPEN SIGNAL DRIVER DOOR LATCH ASSEMBLY DRIVER DOOR MODULE (ON LEFT DOOR, UNDER DOOR TRIM) DRIVER SEAT BELT SWITCH FASTEN SAFETY BELT INDICATOR GROUND GROUND BATTERY GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES IGNITION KEY ALARM SWITCH (ON STEERING COLUMN) INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (UNDER CENTER CONSOLE) INSTRUMENT PANEL CLUSTER (IPC) KEY IN IGN SW SIG PARK LAMP ON SW SIG HEADLAMPS ON SIG KEYLESS ENTRY/ TIRE PRESSURE ANTENNA SIGNAL LIGHTS ON INDICATOR LOGIC LOW TIRE PRESSURE INDICATOR LOGIC LT GRN WIRE MESSAGE CENTER NCA WIRE PARK OFF PARK OFF AUTO HEAD PNK WIRE PPL PPL CLASS 2 SERIAL DATA PPL PPL 1807 1807 745 126 PPL PPL CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA RADIO RADIO ANTENNA MODULE (ABOVE HEADLINER, NEAR REAR WINDOW) RED/WHT WIRE RFA REAR WINDOW ANTENNA SERIAL DATA SERIAL DATA (-) SERIAL DATA (+) SUPPLEMENTAL RESTRAINTS SYSTEM TAN WIRE TAN/WHT WIRE TURN SIGNAL/MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) VOLT CHECK FUSE WHT WIRE