Question about GMC Sierra

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Need to know what the wires are and the colors of them

There are three wires going to the front turn signal what are the three wires for? this is a 1986 GMC pickup

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  • yadayada
    yadayada May 11, 2010

    what three wires?

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Front turn signal should also be the driving lights.it should take a 2 way bulb.1 wire is the ground one goes to the headlight relay one goes to the turn signal relay.i think brown is parking light purple is turnsignal and the other one is the ground

Posted on Apr 23, 2009

  • neuropagan
    neuropagan Apr 23, 2009

    easiest way to see which one is which is to use a 12 volt test light and turn on each switch 1 at a time the one that has no power is the ground.this site has basic wire colors it can be helpful at times especially for radio and alarm wiring and anything basic.

    http://www.bulldogsecurity.com/wireing%2...


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