88 Sierra Radio Wiring

Discussion in 'GMC Truck Forum' started by rsqured7, Sep 28, 2005.

  1. rsqured7

    rsqured7 New Member

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    Hey everyone, new to the forum.
    I have an '88 GMC Sierra, and i am having trouble tracking down a wiring diagram for the radio. There is a two wire lead that isn't plugging in anywhere. Any help would be great!
    Thanks
     
  2. chevyguy

    chevyguy Senior Member

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    Are you trying to repair factory radio, or install aftermarket?
     
  3. rsqured7

    rsqured7 New Member

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    I am tring to re-install the factory radio. I cant get power to the dash unit.
     
  4. chevyguy

    chevyguy Senior Member

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    I dont have a wiring diagram, But have you considered alternate power scource. You dont necessarily have to use factory wiring.
     
  5. Itstali25

    Itstali25 Senior Member

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    #5 Itstali25, Sep 29, 2005
    Last edited: Sep 29, 2005
    Well i dont' have a wiring diagram but i will tell you something that might help you out if you wanna use it, black is ground of course, not too hard there, now with that out of the way, you go through the speaker wires by getting a AA battery and hooking up one wire to positive side of the battery and one to the negative side, you can just pretty much keep trying wires until you narrow down all the speakers, that will narrow down the wires quite a bit then you can probably figure out the rest of the wires, that or you could go to your local car audio people ask them for a wiring diagram, I found the Sound Connections can get ya one for a few bucks
     

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