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Thread: Trailer Wiring

  1. #1

    Default Trailer Wiring

    Does anyone know if there is a factory plug under dash for a Trailer Brake controller?

    What I mean is where do the factory installed wires in the rear (the orange & blue wires) end up? They appear to be for Trailer Power
    and Brake, but I'm not 100% certain.

  2. #2

    Default

    It's probably for a brake controller. They started putting them into vehicles ready for an aftermarket unit a while ago. What does it look like?

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  3. #3

    Default Trailer Wiring

    I have a 1999 Chevy Suburban that has been wired for a trailer by a previous owner. I have a 7 wire plug mounted on the back next to the reciever and wires color coded like the manuel shows, but I don't know where the other ends of the wire are! The previous owners must not have had electric trailer brakes because I can find no place where a control was mounted.

    Where are the blue and the orange wires terminated at in the front of the vehicle?

  4. #4

    Default

    Quote Originally Posted by Lanny Parsley View Post
    I have a 1999 Chevy Suburban that has been wired for a trailer by a previous owner. I have a 7 wire plug mounted on the back next to the reciever and wires color coded like the manuel shows, but I don't know where the other ends of the wire are! The previous owners must not have had electric trailer brakes because I can find no place where a control was mounted.

    Where are the blue and the orange wires terminated at in the front of the vehicle?
    If it was installed by a previous owner they could be under the dash, but if he didnít have a trailer with brakes he may have just run them to the engine compartment and tied them off.

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  5. #5

    Default trailer wiring

    You are right they are under the brake master cyclinder! This is a factory installed harness and it was were the diagram shows it after I found the right diagram. I can install the electric brake module now that I have found the wires.

  6. #6

    Default Color of backup light wiring

    Does anybody know what color wire is for the backup lights for my 2007 TrailBlazer? I am trying to install a backup camera.

  7. #7

    Default

    thanks! this helped a lot...

  8. #8

    Default

    It is a green wire found in the tail light. I've done it.

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