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Discuss Brake Lights won't work when headlights are on in the alt.autos.gm forum at Car Dealer Forums; I drive a 1988 C1500 recently have noticed that the blinkers were flashing quicker than ...
  1. #1
    Shawna
    Guest

    Default Brake Lights won't work when headlights are on

    I drive a 1988 C1500 recently have noticed that the blinkers were flashing
    quicker than usual which usually is a sign that you have a blinker out,
    checked them all no problem. Then I finally figured out that when my
    headlights are on I have no brake lights, when my headlights are off I have
    brake lights. Completly dazed and confused if any one can help out I would
    greatly appreciate it. If needed you can email me at ShawnaCDA [at] aol [dot]
    com

    Thanks in advance

    Shawna


  2. #2
    grockswo
    Guest

    Default Re: Brake Lights won't work when headlights are on


    Shawna wrote:
    > I drive a 1988 C1500 recently have noticed that the blinkers were flashing
    > quicker than usual which usually is a sign that you have a blinker out,
    > checked them all no problem. Then I finally figured out that when my
    > headlights are on I have no brake lights, when my headlights are off I have
    > brake lights. Completly dazed and confused if any one can help out I would
    > greatly appreciate it. If needed you can email me at ShawnaCDA [at] aol [dot]
    > com
    >
    > Thanks in advance
    >
    > Shawna


    Sounds to me like there is a bad ground, basically the difference in
    resistance between the parking lights (those that are on when the
    headlights are on) and the brake lights will allow one to work and then
    the other, but not both. Check the ground wire and make sure the bulbs
    are getting a good connection to ground. I have the same truck, only
    4wd, had troubles with my tail lights for a while, sockets were not
    making good connection. That should fix your problem.

    Gus


  3. #3
    Shawna via CarKB.com
    Guest

    Default Re: Brake Lights won't work when headlights are on

    Thanks for answering my problem Gus, the only thing is, I don't know much
    about fixing things, could you tell me what the ground wire is and where it
    is at?

    grockswo wrote:
    >> I drive a 1988 C1500 recently have noticed that the blinkers were flashing
    >> quicker than usual which usually is a sign that you have a blinker out,

    >[quoted text clipped - 7 lines]
    >>
    >> Shawna

    >
    >Sounds to me like there is a bad ground, basically the difference in
    >resistance between the parking lights (those that are on when the
    >headlights are on) and the brake lights will allow one to work and then
    >the other, but not both. Check the ground wire and make sure the bulbs
    >are getting a good connection to ground. I have the same truck, only
    >4wd, had troubles with my tail lights for a while, sockets were not
    >making good connection. That should fix your problem.
    >
    >Gus


    --
    Message posted via CarKB.com
    http://www.carkb.com/Uwe/Forums.aspx/gmc/200608/1


  4. #4
    Mike Marlow
    Guest

    Default Re: Brake Lights won't work when headlights are on


    "Shawna via CarKB.com" <u24949@uwe> wrote in message
    news:6488eb2ed1ae1@uwe...
    > Thanks for answering my problem Gus, the only thing is, I don't know much
    > about fixing things, could you tell me what the ground wire is and where

    it
    > is at?
    >


    Ground is the black wire. If you're really this unfamiliar with repairs
    you'd be better off taking it to a shop to get it fixed.

    --

    -Mike-
    mmarlowREMOVE@alltel.net



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