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chevy trlr. wiring

Discussion in 'Trucks and Trailers' started by 4speed, May 29, 2006.

  1. 4speed

    4speed LawnSite Member
    Messages: 8

    My "04" 2500hd Is not supplying power to the left brake light. Truck has towing package. I checked the fuse for the trailer left stop/turn (ok) then I checked for power to the fuse and there was none. Right side is fine. Anyone have any Ideas?
  2. Dirty Water

    Dirty Water LawnSite Fanatic
    Messages: 6,794

    Do Right and Left share the same ground?
  3. 4speed

    4speed LawnSite Member
    Messages: 8

    yes, same ground to trailer. problem is in the truck wiring before the fuse box
  4. 4speed

    4speed LawnSite Member
    Messages: 8

    Stopped by the dealer today, and was able to talk to the shop forman. problem was a relay mounted on the back of the fuse box. It was a real p.i.t.a. to replace but it solved the problem!
  5. hosejockey2002

    hosejockey2002 LawnSite Bronze Member
    Messages: 1,195

    I had the exact same problem with my '05. They told me it was a turn signal flasher. That didn't make a lot of sense to me since it was a brake light not working (the turn signal worked) but it's fixed now so it's all good.
  6. 4speed

    4speed LawnSite Member
    Messages: 8

    Thats right Hosejockey. They called it a flasher. I was leaving that day for dover and couldn't get in for service.They wrote a service order and just gave me the part. It was located on the back of the fuse panel and as I said ,It was a real pain to replace.

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