Having problems wiring my LED third brake light mod
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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, Having problems wiring my LED third brake light mod in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; Hello all, I just finished the LED mod for my third brake light but it does not light up. I ...
  1. #1
    robio361 is offline Cadillac Owners Member
    Automobile(s): 2003 CTS automatic
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    Having problems wiring my LED third brake light mod

    Hello all,
    I just finished the LED mod for my third brake light but it does not light up. I followed the directions in the Faq's page and when I connect the two wires from the LED's to the original wires I get nothing. I checked it by connecting a simple 12v ac plug adapter that powers many different electronics and they work just fine. When I checked the two original wire leads with a volt meter it read 11.49v. Could it be that I'm not getting enough power to the LED's? If so can I connect the two wires to another source that will supply power when I apply the brake? I tried with the car lights on and off, car turned on and off, but still no luck. Any advise would be greatly appreciated.

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  3. #2
    Pete(UK)'s Avatar
    Pete(UK) is offline Cadillac Owners Member
    Automobile(s): CTS 2007 Sport Luxury
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    Re: Having problems wiring my LED third brake light mod

    Have you tried switching the wires, LED's only work it they are rightly connected.

  4. #3
    Argent1's Avatar
    Argent1 is offline Cadillac Owners Connoisseur
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    Re: Having problems wiring my LED third brake light mod

    Sorry, posted in error.

  5. #4
    1BadCadSTS's Avatar
    1BadCadSTS is online now Cadillac Owners Connoisseur
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    Quote Originally Posted by Pete(UK)
    Have you tried switching the wires, LED's only work it they are rightly connected.
    Winner
    Argent1 likes this.

  6. #5
    robio361 is offline Cadillac Owners Member
    Automobile(s): 2003 CTS automatic
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    Thread Starter

    Re: Having problems wiring my LED third brake light mod

    Yes I have tried switching the wires bug still no luck. It's the strangest thing for something so simple.

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