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Vehicle Wiring Details for your
2005-2007 Cadillac STS Wiring Diagram
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Listed below is the vehicle specific wiring diagram for your car alarm, remote starter or keyless entry installation into your 2005-2007 Cadillac STS . This information outlines the wires location, color and polarity to help you identify the proper connection spots in the vehicle. Please be sure to test all of your wires with a digital multimeter before making any connections. More information on using a multimeter and testing wires please see our Technical Support Area.


 PART   COLOR  LOCATION
 12 VOLT CONSTANT   RED (+)   @ BATTERY UNDER HOOD
 STARTER  YELLOW (-) Not for Remote Start SEE NOTE * 7  @ ECM, C2, Pin 35 or BLUE Plug, Pin 14 See NOTE *1
 STARTER 2  N/A  
 IGNITION 1  PINK (+)  @ THE IMP MODULE NOTE *2
 IGNITION 2  N/A  
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  ORANGE (+) Not Required for Remote Start  @ IMP, 24-Pin plug, Pin 7 See NOTE *2
 ACCESSORY/HEATER BLOWER 2  BROWN (+) Not Required for Remote Start  @ IMP, 24-Pin plug, Pin 1 See NOTE *2
 KEYSENSE  N/A  
 PARKING LIGHTS ( - )  BROWN/WHITE (-)  @ IMP, 26-Pin plug, Pin 14 See NOTE *2
 PARKING LIGHTS ( + )  PURPLE (+) and BROWN/WHITE (+) Use both, See NOTE *6  IN EACH KICK PANEL in harness going to rear of vehicle See DIAGRAM
 POWER LOCK  ORANGE/BLACK (TYPE B)  @ DRIVER DOOR LOCK SWITCH in DRIVERS door
 POWER UNLOCK  ORANGE/BLACK (TYPE B)  @ DRIVERS DOOR LOCK SWITCH in DRIVERS door
 DOOR TRIGGER  See NOTE *3  @ EACH DOOR MODULE IN EACH DOOR See DIAGRAM
 DOMELIGHT SUPERVISION  GRAY (-), Requires #775 Relay  @ UNDER DASH LIGHT
 TRUNK RELEASE  LIGHT BLUE (-)  @ RIM, 16-Pin Plug Pin 11 See NOTE *4
 SLIDING POWER DOOR  N/A  
 HORN  TAN (-)  @ IPM, 24-Pin plug, Pin 9 See NOTE *2
 TACH  ANY wire NOT PINK/BLACK  @ ANY FUEL INJECTOR
 WAIT TO START LIGHT  N/A  
 BRAKE  WHITE (+)  @ IMP, 26-Pin plug, Pin 5 See NOTE *2
 FACTORY ALARM DISARM   LIGHT GREEN (-)  @ DDM, 20-Pin plug, Pin 4 See NOTE *5
 ANTI-THEFT  TRANSPONDER ANTI-THEFT  TRANSPONDER @ IGNITION SWITCH TUMBLER
 EXTRA INFORMATION
 NOTE *1 the ECM on the 3.6L engine is on the Passenger side valve cover, on the 4.6L engine the ECM is located below the Drivers side Headlight. NOTE *2 the IMP Module is located behind the Glove Box. NOTE *3 the DRIVERS DOOR is a GRAY/BLACK (-) 20-Pin plug, Pin 2, the PASSENGER DOOR is a TAN/WHITE (-) 20-Pin plug, Pin 2, the DRIVERS REAR DOOR is a LIGHT BLUE/BLACK (-) 20-Pin plug Pin 4 and the PASSENGER REAR DOOR is a LIGHT GREEN/BLACK (-) 20-Pin plug, Pin 4. When connecting to an Alarm System use all 4 wires and DIODE ISOLATE See DIAGRAM NOTE *4 the RIM Module is located below the Drivers side of the Rear Deck NOTE *5 the DDM is the DRIVERS DOOR MODULE in the Drivers door. NOTE *6 the PARKING LIGHTS on this vehicle use a 2-Wire System that will require 2 extra Relays part #775, to connect, See DIAGRAM. NOTE *7 THIS VEHICLE HAS A SPECIAL IGNITION THAT REQUIRES BYPASS PKUGM2X TO GET AROUND THE IGNITION AND ALSO KEYLESS BYPASS.
 
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