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  • Electrical: Temp. gauge

    Correct me if I'm wrong! To test a Hawk temp. gauge, connect the lower (12v) post to a battery and the upper post to ground, should read full scale? Also, if I use a 9v battery the same way will I get any reading? (I don't wanna drag a 12v battery around a swap meet!). -Jim

  • #2
    Don't apply 12 volts for more than a few seconds or a good gauge could become a bad gauge quickly.

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    • #3
      Just long enough to see the needle move.- Jim

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