2005 Cadillac STS Car Alarm Wiring Guide

2005 Cadillac STS Car Alarm Wiring Guide

Battery Constant 12v+ Positive Wire (+): Red
Battery Constant 12v+ Positive Wire Location: At Battery Under Hood

Starter Positive Wire (+): Yellow (-) Not For Remote Start
Starter Positive Wire Location: At ECM, C2, Pin 35 Or Blue Plug, Pin 14. The ECM on the 3.6 liter engine is on the passenger side valve cover, on the 4.6 liter engine the ECM is located below the drivers side headlight.

Second Starter Positive Wire (+): N/A
Second Starter Positive Wire Location: N/A

Ignition Positive Wire (+): Pink (+) Not Required For Remote Start
Ignition Positive Wire Location: At IMP, 26-Pin Plug, Pin 6. The IMP module is located behind the glove box.

Second Ignition Positive Wire (+): N/A
Second Ignition Positive Wire Location: N/A

Third Ignition Positive Wire (+): N/A
Third Ignition Positive Wire Location: N/A

Accessory Positive Wire (+): Orange (Not Required For Remote Start)
Accessory Positive Wire Location: At IMP, 24-Pin Plug, Pin 7. The IMP module is located behind the glove box.

Second Accessory Positive Wire (+): Brown (Not Required For Remote Start)
Second Accessory Positive Wire Location: At IMP, 24-Pin Plug, Pin 1. The IMP module is located behind the glove box.

Key Sense Wire: N/A
Key Sense Wire Location: N/A

Parking Light Negative Wire (-): Brown/White
Parking Light Negative Wire Location: At IMP, 26-Pin Plug, Pin 14. The IMP module is located behind the glove box.

Parking Light Positive Wire (+): Purple (+) And Brown/White (Use Both). The parking lights on this vehicle use a 2-wire system that will require 2 extra relays, to connect.
Parking Light Positive Wire Location: In Each Kick Panel In Harness Going To Rear Of Vehicle See Diagram

Power Door Lock Negative Wire (-): Orange/Black
Power Door Lock Negative Wire Location: At Driver Door Lock Switch In Drivers Door

Power Door Unlock Negative Wire (-): Orange/Black
Power Door Unlock Negative Wire Location: At Drivers Door Lock Switch In Drivers Door

Door Trigger Negative Wire (-): 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.
Door Trigger Negative Wire Location: At Each Door Module In Each Door

Dome Light Supervision Wire (-): Gray (Requires Relay)
Dome Light Supervision Wire Location: At Under Dash Light

Trunk Release Negative Wire (-): Light Blue
Trunk Release Negative Wire Location: At RIM, 16-Pin Plug, Pin 11. The RIM module is located below the drivers side of the rear deck

Sliding Power Door Wire: N/A
Sliding Power Door Wire Location: N/A

Horn Negative Wire (-): Tan
Horn Negative Wire Location: At IPM Module, 24-Pin Plug, Pin 9. The IMP module is located behind the glove box.

Tachometer Wire Negative Wire (-): Any Wire Not Pink/Black
Tachometer Wire Negative Wire Location: At Any Fuel Injector

Wait To Start Wire: N/A
Wait To Start Location: N/A

Brake Light Positive Wire (+): White
Brake Light Positive Wire Location: At IMP Module, 26-Pin Plug, Pin 5. The IMP module is located behind the glove box.

Factory Alarm Disarm Wire (-): Light Green
Factory Alarm Disarm Wire Location: At DDM, 20-Pin Plug, Pin 4. The DDM is the drivers door module in the drivers door.

Factory Anti-Theft System: N/A
Factory Anti-Theft System Location: N/A

The 2005 Cadillac STS alarm wire color and location information above is updated as it is submitted by the Modified Life community.

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