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Thread: HQ guages

  1. #1
    Sandman Guru
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    HQ guages

    This Ebay auction shows the back of 2 x HQ U21 guages:

    http://www.ebay.com.au/itm/holden-hq...9#ht_83wt_1170

    Shows the 120mph/200kM/h speedo has picking code QA, and the tacho has QM. Clock is QL.

    HQ broadcast sheet for a Sandman shows QM for the tacho and QX for the 140mph/225kM/h speedo.

    Can anyone add any more codes?

    The codes I have off the HQ XX7 broadcast sheet are (left to right looking at them from the front): QW, QM, QK, QX, RD.

    Is the fuel guage in the right hand one? If it is this will explain the RD code, muct have changed when guage went from thermal to magnetic sender.

  2. #2
    Leadfoot buickzz's Avatar
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    Left to Right :: Fuel/Oil, Tacho, clock if fitted, Speedo, Temp/Battery

  3. #3
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    I wonder what changed with the temp/battery guage by 1974 to make it have a different code?

  4. #4
    Night Rider Innuendo's Avatar
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    Pretty sure the fuel sender changed. That would have changed the ohms of the gauge.

  5. #5
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    That was my original theory, but is the left hand intrument though with the fuel guage on it and it has a QW code. It is the RD one that intrigues me.

  6. #6
    Leadfoot buickzz's Avatar
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    Was it as simple as a change in graphics on the face of the gauge . .?? I'll check i think i have some early gauges at home in the shed.

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