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gauge cluster fried?

Discussion in 'Chevy C/K Truck Forum' started by K15 Blazer Guy, Aug 22, 2013.

  1. K15 Blazer Guy

    K15 Blazer Guy Member 2 Years 100 Posts

    anyone else experience this?:
    speedo and tach twitch and freak out under FULL voltage load
    like, headlights, blower motor, etc etc

    but only when i have the high beams on plus the low beams

    otherwise its quite accurate... im lost... help!!
  2. Arbitert343GS

    Arbitert343GS New Member

    Have you checked to see if the printed circuit on the back of the gauges is ok, I had a friend with about the same problem in his 69 and it was because the plastic printed circuit was melted.
  3. K15 Blazer Guy

    K15 Blazer Guy Member 2 Years 100 Posts

    fixed it.
    the main bus wire was over 6' long and had worn through somewhere....
    new wire, new battery cables, fresh battery grounds. fixed

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