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  1. #1

    Default correct alt, battery starter wiring? 1990 gmc c1500

    Hello, I recently picked up a 1990 gmc 1500 reg cab 2wd lb, with a rebuilt 305 in it. I am working out some bugs at the moment. I think that wiring from the battery and alt are incorrect.

    Currently the ALT wire goes to the junction on the fire wall.
    Currently the battery wire goes to the starter and a separate smaller wire from the battery to the junction on the fire wall

    Could someone please tell me what is the correct wiring is.

    sorry wrong forum...
    Last edited by siggersd; 01-02-2012 at 05:53 PM.

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