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How do I hook up a volt gauge?

Discussion in 'The Hokey Ass Message Board' started by Barn-core, May 8, 2006.

  1. Barn-core
    Joined:
    Jan 26, 2004
    Posts:
    934
    Location:
    Yuba City, CA

    Barn-core Member

    A car I recently bought came with a row of aftermarket gauges under the dash. They were all hooked up except the volt gauge, and I've never hooked one up before. So I was hopin' someone could point me in the right direction. Thanks, Barn-core.
  2. 47bob
    Joined:
    Oct 28, 2005
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    625
    Location:
    Las Vegas, NV

    47bob Member

    + to the always hot pole on the ignition switch and - to ground. Bob
  3. 4tford
    Joined:
    Aug 27, 2005
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    Location:
    Hartland, michigan

    4tford Member

    Volt gauges are usually connected to the ignition circuit so it only reads when the ignition is on. Not very accurate but you will be able to tell if your charging system is working since the voltage should read between 13 to 14 volts depending on temperature. You can connect to the battery but there would be a small current draw (ma) all the time.
  4. Barn-core
    Joined:
    Jan 26, 2004
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    Location:
    Yuba City, CA

    Barn-core Member

    Thanks a lot guys, I'll probably try to hook it up after work today.
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  5. AnimalAin
    Joined:
    Jul 20, 2002
    Posts:
    3,383
    Location:
    Las Vegas, NV USA

    AnimalAin Member

    Make sure that you connect the positive side of the gauge to a switched 12v source, not direct to the battery. I don't have any experience with a car set up like that, but I know for a fact that if you leave the voltmeter "ON" overnight on a C-130, it will flatten the battery. In a car, it may not happen overnight, but if it sits for a few days......

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