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  • thermostat gauge

    my thermostat gauge isnt working. i tried to ground out the wire and it still reads nothing... i was told if i grounded it out, that it should ping over and read the hottest reading.

    so my question is... is this the right way to diagnose a bad temp gauge? if not what are some suggestions. i was gonna try to rewire it first, before i did anything like replace a gauge.

    Also do i have to replace the whole gauge cluster or can i just replace the thermostat gauge.

    i havent ruled out a bad wire ive traced it as far as i can see and it dosnt appear to be shorting out or corrodeing. thanks for the info.

  • #2
    would help if we knew what car you're referring to, but in general yes this means a bad gauge (unless you have no power at gauge) and yes it is individually replaceable.

    nate

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    55 Commander Starlight
    http://members.cox.net/njnagel
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    55 Commander Starlight
    http://members.cox.net/njnagel

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    • #3
      62 lark 289., and thanks for the help.

      62 Lark Hardtop, 289 v8 stude power.

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      • #4
        That gauge can be replaced, as well, but you have to pull the whole assembly and then pull the gauge out from behind on the workbench. not really that bad but you will spend some time upside down under the dash. If you go with a used one, touch up the needle with some "orange glow" paint before you put it back in, will make a big difference in the appearance of your dash.

        Also if it fails the ground test at the head make sure it's not a broken wire or bad connection - check it again with a test lead to ground at the gauge. The wire you're looking for is orange.

        nate

        --
        55 Commander Starlight
        http://members.cox.net/njnagel
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        55 Commander Starlight
        http://members.cox.net/njnagel

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        • #5
          forgot to mention; a '63 gauge cluster will fit right in, if you think you may want to get rid of the idiot lights. The oil pressure gauge is mechanical but you'll have to do some wiring for the ammeter.

          nate

          --
          55 Commander Starlight
          http://members.cox.net/njnagel
          --
          55 Commander Starlight
          http://members.cox.net/njnagel

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          • #6
            Like Nate said, first make sure you have 12V to the gauge. Use a volt meter or test light on the two terminals on back of the gauge with the ignition "ON". Between one of the terminals and ground, you should have 12V. If not, that's your problem. If you do have 12V, leave the key on and disconnect the wire at the sending unit (back side of the driver's side head I think). Ground that wire and the temp should go full hot. If it doesn't, bad gauge. If it does, bad sending unit.


            Dick Steinkamp
            Bellingham, WA

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