Cadillac STS I (2004-2007) radio Wiring diagrams

2 1 SERIAL DATA SERIAL DATA 2501 2500 COMPUTER DATA LINES SYSTEM 3.6L 3.6L 4.6L 32 11 25 35 43 42 55 LOW REFERENCE A/C REFRIG PRESS SENSOR A/C CLUTCH RELAY CTRL 38 54 LOW REFERENCE ECT SENSOR SIGNAL 4.6L (3.6L) (IN ENGINE HARNESS, 28 CM FROM MAF SENSOR CONNECTOR) 7 23 55 LOW REFERENCE ECT SENSOR SIGNAL SERIAL DATA A/C REFRIGERANT PRESSURE SENSOR (NEAR THE LEFT FRONT STRUT TOWER) AFTER BOIL FUSE AFTER BOIL HEATER PUMP (4.6L) AFTER BOIL RELAY (4.6L) AMBIENT AIR TEMPERATURE SENSOR (UNDER FRONT FACIA, NEAR CENTER OF GRILLE) BLK WIRE BLK/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM COOLANT LEVEL SWITCH (IN BOTTOM OF COOLANT RESERVOIR) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (FRONT OF ENGINE, ON RIGHT VALVE COVER) ENGINE CONTROLS SYSTEM ENGINE COOLANT HOT ENGINE COOLANT LOW LEVEL FEED GRY WIRE HI SPEED FAN RELAY HIGH FAN FUSE HOT AT ALL TIMES INSTRUMENT PANEL CLUSTER LEFT COOLING FAN (BEHIND 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 (OR RED/BLK) WIRE ORG/BLK WIRE PNK WIRE RADIO RED WIRE RED/BLK WIRE RIGHT COOLING FAN (BEHIND RADIATOR) RIGHT REAR FUSE BLOCK (UNDER RIGHT SIDE OF REAR SEAT) RTN S/P FAN RELAY S107 (3.6L) (IN ENGINE HARN, 36 CM FROM BRAKE PRESSURE SENSOR CONNECTOR) SERIAL DATA SIG SPLICE PACK TAN (OR BLK/WHT) WIRE TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPARTMENT) WHT WIRE YEL WIRE

AUDIO AMPLIFIER DIGITAL RADIO RECEIVER DK GRN WIRE DRIVER DOOR MODULE (DDM) (IN DOOR) DRIVER DOOR SWITCH ASSEMBLY (IN DOOR) FROM INSTRUMENT PANEL MODULE (IPM) (DIAGRAM 1 OF 1) FRONT PASSENGER DOOR MODULE (FPDM) (IN DOOR) HEAD UP DISPLAY (HUD) HVAC CONTROL MODULE (IN CENTER OF DASH, BELOW RADIO) INSTRUMENT PANEL CLUSTER (IPC) LEFT REAR DOOR MODULE (LRDM) (IN DOOR) LOW SPEED GM LAN SERIAL DATA MEMORY SEAT MODULE (MSM) (UNDER DRIVER SEAT) RADIO REAR INTEGRATION MODULE (RIM) (UNDER LEFT SIDE OF PACKAGE SHELF) REMOTE CONTROL DOOR LOCK RECEIVER (UNDER PACKAGE SHELF) RIGHT REAR DOOR MODULE (RRDM) (IN DOOR) SPLICE SPLICE PACK STEERING COLUMN LOCK CONTROL MODULE (LEFT SIDE OF STEERING COLUMN) TO VEHICLE COMMUNICATION INTERFACE MODULE (VCIM) (DIAGRAM 1 OF 1) TV ANTENNA MODULE (BELOW LEFT SIDE OF PACKAGE SHELF)

2 1 SERIAL DATA SERIAL DATA 2501 2500 COMPUTER DATA LINES SYSTEM 3.6L 3.6L 4.6L 38 54 LOW REFERENCE ECT SENSOR SIGNAL 4.6L 43 42 55 MAIN RELAY CTRL HI SPEED FAN RELAY CTRL LOW SPEED FAN RELAY CTRL 7 23 55 LOW REFERENCE ECT SENSOR SIGNAL SERIAL DATA AFTER BOIL COOLANT PMP REL AFTER BOIL FUSE AFTER BOIL HEATER PUMP (4.6L) AFTER BOIL RELAY (4.6L) BLK WIRE BRN WIRE COMPUTER DATA LINES SYSTEM COOLANT LEVEL SWITCH (IN BOTTOM OF COOLANT RESERVOIR) COOLANT LEVEL SWITCH SIGNAL LOW SPD GM/LAN SERIAL DATA DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (FRONT OF ENGINE, ON RIGHT VALVE COVER) ENGINE COOLANT HOT ENGINE COOLANT LOW LEVEL GRY WIRE HI SPEED FAN RELAY HIGH FAN FUSE HOT AT ALL TIMES HVAC CONTROL MODULE (IN CENTER OF DASH, BELOW RADIO) INSTRUMENT PANEL CLUSTER LEFT COOLING FAN (BEHIND RADIATOR) LO SPEED FAN RELAY LOGIC LOW FAN FUSE LT BLU WIRE LT GRN WIRE MAIN RELAY MESSAGE CENTER PNK WIRE RADIO RIGHT COOLING FAN (BEHIND RADIATOR) RIGHT REAR FUSE BLOCK (UNDER RIGHT SIDE OF REAR SEAT) S/P FAN RELAY SERIAL DATA SPLICE PACK TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPARTMENT) WHT WIRE YEL WIRE

13 14 15 BARE PPL DRAIN WIRE AUX VIDEO HI SIG VSS 2 4 5 PNK VOICE RECOG SIG VOICE RECOG LOW DRAIN WIRE 3.6L 4.6L ANTENNA ANTENNA COAX AUX AUD RT SIG AUX AUD LT SIG AUX DET SIG DRN WIRE DRN WIRE AUX VID HI SIG BARE BARE BARE BARE PNK BARE PPL WIRE BARE PPL BASE BLK WIRE BLK/WHT WIRE BRN WIRE CASE GROUND CELLULAR MICROPHONE SIGNAL DRAIN WIRE 10 2 BARE BARE COAX COAX RADIO ANTENNA COAX COAXIAL CABLE COMPUTER DATA LINES SYSTEM (IN REAR COMPT, TO REAR OF LEFT REAR SHOCK TOWER) DK GRN WIRE GLOBAL POSITIONING SYSTEM (GPS) ANTENNA GPS SIG GRY WIRE HOT AT ALL TIMES INSIDE REARVIEW MIRROR (ISRVM) LUXURY NCA WIRE PNK BARE BARE PPL WIRE PNK WIRE PNK/BLK WIRE RADIO RADIO ANTENNA MODULE (ABOVE CENTER REAR OF HEADLINER) RADIO REAR WINDOW ANTENNA RADIO/ ONSTAR FUSE REAR OBJECT SENSOR CONTROL MODULE (IN LEFT SIDE OF REAR COMPT, UNDER REAR SHELF) RED WIRE RED/WHT WIRE RIGHT REAR FUSE BLOCK (UNDER RIGHT SIDE OF REAR SEAT) SPLICE PACK VSS W/ HID HEADLAMPS W/ VEHICLE COMMUNICATION SYSTEM WHT WIRE YEL WIRE

A/T SHIFT SHIFT LEVER ASSEMBLY AUTOMATIC LEVELING CONTROL (ALC) COMPRESSOR RELAY BLK WIRE BRN WIRE CANISTER VENT FUSE SUNROOF FUSE CLIMATE CONTROL SEAT MODULE DIGITAL RADIO RECEIVER EVAPORATIVE EMISSIONS (EVAP) CANISTER VENT SOLENOID VALVE SUNROOF CONTROL MODULE FROM INSTRUMENT PANEL MODULE (VIA SPLICE FROM LEFT REAR FUSE BLOCK (TRUNK DOOR/ VALET FROM UNDERHOOD FUSE BLOCK FRONT PASSENGER WINDOW MOTOR DRIVER WINDOW MOTOR FUEL PUMP FUSE STOP LAMPS FUSE FUEL PUMP RELAY STOP LAMP RELAY IGN 3 FUSE IGN-3 RELAY LEFT FRONT SEAT BELT RETRACTOR LEFT REAR FUSE BLOCK (UNDER LEFT SIDE OF REAR SEAT) LEFT REAR WINDOW MOTOR MEMORY SEAT MODULE (MSM) NCA WIRE ORG/ WIRE PASSENGER BACK COOLED SEAT BLOWER MOTOR PASSENGER CLIMATE CONTROL SEAT MODULE PASSENGER CUSHION COOLED SEAT BLOWER MOTOR PASSENGER SEAT ADJUSTER SWITCH PASSENGER LUMBAR ADJUSTER SWITCH PIN 31) (DIAGRAM 4 OF 7) POWER SEATS CIRCUIT BREAKER POWER WINDOW CIRCUIT BREAKER RADIO RADIO/ ONSTAR FUSE REAR HEATED SEAT CONTROL MODULE REAR HEATED SEAT FUSE REAR INTEGRATION MODULE (RIM) RED WIRE RF HTD ST/ S-BAND FUSE RIGHT FRONT SEAT BELT RETRACTOR RIGHT REAR WINDOW MOTOR RIGHT TURN SIGNAL FUSE SPARE FUSE SPLICE PACK VEHICLE COMMUNICATION INTERFACE MODULE (VCIM) W/ POWER LUMBAR CONTROL SEATS W/O POWER LUMBAR CONTROL SEATS WHT WIRE

3.6L 4.6L 5060 851 LO SPEED GMLAN SER DATA GROUND 5339 5345 TV AUDIO LO REF AUX AUDIO SCREEN (1) BARE 814 2056 818 BARE PPL DRAIN WIRE AUX VIDEO HI SIG VSS ANTENNA AUX AUD RT SIG AUX AUD LT SIG AUX DET SIG DRN WIRE DRN WIRE AUX VID HI SIG BARE BARE (BLUNT CUT) BARE PPL PNK BARE WIRE BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE CASE GROUND CELL TELE VOICE LOW SIG CELL TELE VOICE SIG CELLULAR MICROPHONE SIGNAL DRAIN WIRE VSS 10 2 6 BARE BARE BARE COAX COAX RADIO ANTENNA COAX COAXIAL CABLE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DRN WIRE DRN WIRE GLOBAL POSITIONING SYSTEM (GPS) ANTENNA GPS SIG GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES INSIDE REARVIEW MIRROR (ISRVM) LT BLU/BLK WIRE LT BLU/WHT WIRE LT DK BARE BARE LT GRN WIRE LT GRN/WHT WIRE NCA WIRE PNK AUX DETECT SIG WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE RADIO RADIO ANTENNA MODULE (ABOVE CENTER REAR OF HEADLINER) RADIO REAR WINDOW ANTENNA RADIO/ ONSTAR FUSE REAR OBJECT SENSOR CONTROL MODULE (IN LEFT SIDE OF REAR COMPT, UNDER REAR SHELF) RED WIRE RED/WHT WIRE RIGHT REAR FUSE BLOCK (UNDER RIGHT SIDE OF REAR SEAT) SATELLITE RADIO CIRCUIT SPLICE PACK TAN WIRE VOICE RECOG AUD LOW REF VOICE RECOG AUD SIG VSS W/ HID HEADLAMPS W/ VEHICLE COMMUNICATION SYSTEM WHT WIRE YEL WIRE

1 2 3 4 5 6 7 8 9 10 (PINS 11-16 NOT USED) LEFT AUDIO SIGNAL (1) 3.6L 4.6L 5060 851 LO SPEED GMLAN SER DATA GROUND 6761 5838 CNTR CHNL LO LEV AUD SIG(-) AMP AUD PRMPT DRAIN WIRE BARE 814 2056 BARE PPL DRAIN WIRE AUX VIDEO HI SIG ANTENNA AUX AUD RT SIG AUX AUD LT SIG AUX DET SIG DRN WIRE DRN WIRE AUX VID HI SIG BARE BARE (BLUNT CUT) BARE PPL PNK BARE WIRE BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/WHT WIRE CASE GROUND CELL TELE VOICE LOW SIG CELL TELE VOICE SIG CELLULAR MICROPHONE SIGNAL DRAIN WIRE VSS 10 2 6 BARE BARE BARE COAX COAX RADIO ANTENNA COAX COAXIAL CABLE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DRN WIRE DRN WIRE GLOBAL POSITIONING SYSTEM (GPS) ANTENNA GPS SIG GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES INSIDE REARVIEW MIRROR (ISRVM) LT BLU/BLK WIRE LT BLU/WHT WIRE LT DK BARE BARE LT GRN WIRE LT GRN/WHT WIRE NCA WIRE ORG/ WIRE PNK AUX DETECT SIG WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL 6 7 8 9 10 11 12 13 14 15 16 RADIO RADIO ANTENNA MODULE (ABOVE CENTER REAR OF HEADLINER) RADIO REAR WINDOW ANTENNA RADIO/ ONSTAR FUSE REAR OBJECT SENSOR CONTROL MODULE (IN LEFT SIDE OF REAR COMPT, UNDER REAR SHELF) RED WIRE RED/WHT WIRE RIGHT REAR FUSE BLOCK (UNDER RIGHT SIDE OF REAR SEAT) SATELLITE RADIO CIRCUIT SPLICE PACK TAN WIRE VOICE RECOG AUD LOW REF VOICE RECOG AUD SIG VSS W/ HID HEADLAMPS W/ VEHICLE COMMUNICATION SYSTEM WHT WIRE YEL WIRE

ANTENNA SIG BARE AUX AUD SCRN LT TV AUD SIG RT TV AUD SIG LOW REF BATTERY BLK WIRE CELLULAR NAVIGATION AND DIGITAL RADIO ANTENNA COAX COMPUTER DATA LINES SYSTEM DIGITAL RADIO RECEIVER (IN PASSENGER COMPT, ON LEFT SIDE OF REAR PACKAGE SHELF) DK GRN WIRE GROUND LOW REF GRY/BLK WIRE HOT AT ALL TIMES LT BLU/WHT WIRE LT GRN/WHT WIRE RADIO RED WIRE RED/WHT WIRE RF HTDST/ S-BAND FUSE RIGHT REAR FUSE BLOCK (UNDER RIGHT SIDE OF REAR SEAT) SERIAL DATA WHT WIRE

A/C SYSTEM ACCELERATOR PEDAL POSITION SENSOR (TOP OF ACCEL PEDAL) APP SENS SIG 1 PPL BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CLU RLY CTRL MIL CTRL COOLING FANS SYSTEM DATA WAKE-UP DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (FRONT OF ENGINE, ON RIGHT VALVE COVER) EVAP CANISTER VENT SOLENOID VALVE (ABOVE REAR DIFFERENTIAL) FUEL LEV SIG MAF SIG APP SENS 2 SIG FUEL LEVEL SENSOR FUEL PUMP, SENSOR ASSEMBLY GMLAN BUS- GRY WIRE IGN 1 VOLT INSIDE REARVIEW MIRROR INSTRUMENT PANEL CLUSTER (IPC) INSTRUMENT PANEL MODULE (IPM) LAN BUS + LOGIC LOW REF LT BLU WIRE MALFUNCTION INDICATOR LAMP ORG/ WIRE ORG/BLK WIRE P/N SIG EVAP VENT SOL PNK IGN 1 VOLT FAN RLY CTRL WIRE PNK WIRE PNK/BLK WIRE PPL PPL LOW REF A/C REF PRES RLY COIL SUPP IAT SIG TANK PRES SIG PPL/WHT WIRE RADIO RED/BLK WIRE RED/WHT WIRE RLY COIL CTRL BATTERY + RLY CTRL FAN RLY CTRL SECONDARY FUEL LEVEL SENSOR SENSOR 1) 2501 1274 1669 5728 STARTING CIRCUIT TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRANSMISSION CONTROL MODULE (RIGHT FRONT OF ENGINE COMPT) TRANSMISSION MANUAL SHIFT SHAFT SWITCH ASSEMBLY (IN TRANSMISSION) VSS SIG SER DATA BUS MAIN RLY CTRL LOW REF LOW REF FUEL LEV SENS WAKE-UP WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

2500 2501 COMPUTER DATA LINES SYSTEM A/C PRESS LOW REF APP LOW REF APP LOW REF A/C REFRIGERANT PRESSURE SENSOR (NEAR LEFT FRONT STRUT TOWER) A/C SYSTEM ACCELERATOR PEDAL POSITION (APP) SENSOR (ATTACHED TO TOP OF ACCELERATOR PEDAL) APPS 1 SIG VEHICLE SPEED SIG MAF SEN SIG BLK WIRE BRN WIRE BRN/WHT WIRE COOLING FANS SYSTEM 473 5069 DATA WAKE-UP DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM, TCM FUSE ENGINE CONTROL MODULE (ECM) (BELOW LEFT HEADLAMP) EVAP VENT SOL CTNL A/C PRESS SENS SIG EVAPORATIVE EMISSIONS (EVAP) CANISTER VENT SOLENOID (ABOVE REAR DIFFERENTIAL) EXTERIOR LIGHTS SYSTEM 17 447 FAN RLY CTRL MAIN RLY CTRL FUEL PMP RLY CNTL MIL CNTL A/C COMP CLTCH RLY FUSE GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START IAT SEN SIG IAT SIG IGN IGN 1 VLT IGN 1 VLT IGN 1 VLT BATTERY + VLT APPS 2 SIG PNK PNK WIRE INSIDE REARVIEW MIRROR INSTRUMENT PANEL CLUSTER (IPC) INSTRUMENT PANEL MODULE (IPM) LO SPD COOL FAN RLY LOGIC LOW REF LT BLU WIRE MAF LOW REF A/C PRESS LOW REF MAIN RELAY MASS AIR FLOW (MAF) SENSOR (IN AIR INTAKE DUCT) MIL IND ORG/BLK WIRE ORG/WHT WIRE PNK WIRE PNK/BLK WIRE PPL RADIO RED/WHT WIRE SENS SIG SENSOR 1 STARTING SYSTEM STOPLAMP SW SIG STRTR ENABLE RLY CNTL TAN WIRE TAN/BLK WIRE TCM/ IPC/ ECM FUSE TO EVEN COILS FUSE (DIAGRAM 4 OF 5) TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE