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Thread: Dashboard GEN light

  1. #1
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    Dashboard GEN light

    A strange thing happened to my '76 Chevy this afternoon. I moved it out to clean the garage floor, let it warm up enough to prevent condensation in the engine, and left it out in the sun for about a couple of hours, leaving the key in the ignition.
    I restarted it to go shopping and the GEN light came on, I revved the engine a few times but it stayed on, so turning the engine off then restarting it and the light goes out. Any ideas on this minor phenomenon? I thought the alternator went on the blink!

    Larry

  2. #2
    DonTom
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    Quote Originally Posted by ChevyMan View Post
    A strange thing happened to my '76 Chevy this afternoon. I moved it out to clean the garage floor, let it warm up enough to prevent condensation in the engine, and left it out in the sun for about a couple of hours, leaving the key in the ignition.
    I restarted it to go shopping and the GEN light came on, I revved the engine a few times but it stayed on, so turning the engine off then restarting it and the light goes out. Any ideas on this minor phenomenon? I thought the alternator went on the blink!Larry
    I am going to guess an ignition switch intermittent contact. It does NOT seem to be a problem with the alternator itself.

    But with intermittents, almost anything is possible.

    -Don- SF, CA

  3. #3
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    Quote Originally Posted by DonTom View Post
    I am going to guess an ignition switch intermittent contact. It does NOT seem to be a problem with the alternator itself.

    But with intermittents, almost anything is possible.

    -Don- SF, CA

    Well,I should hope it's not the alternator itself which is little over two years old. Larry

  4. #4
    Vulture of The Western World Eric's Avatar
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    Quote Originally Posted by ChevyMan View Post
    A strange thing happened to my '76 Chevy this afternoon. I moved it out to clean the garage floor, let it warm up enough to prevent condensation in the engine, and left it out in the sun for about a couple of hours, leaving the key in the ignition.
    I restarted it to go shopping and the GEN light came on, I revved the engine a few times but it stayed on, so turning the engine off then restarting it and the light goes out. Any ideas on this minor phenomenon? I thought the alternator went on the blink!

    Larry
    I agree with Don. Also, check the back of the alternator. On GM cars of that era, the little nut securing the main "hot" wire sometimes works itself a little loose. Follow the red wire to the back of the alternator. If the nut is loose, hand tighten it with a small wrench. Caution: If this repair is necessary, first disconnect the battery to avoid grounding/sparks via the wrench completing the contact between the "+" side of the system and the "-" ground (engine).

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