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Dash voltmeter power source? 200

uid 25912's pic
posted by  Sven's Maintainer on  Mon Oct 14 09:52 CST 2019
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last visit: Sun Sep 16 20:44 CST 2012
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Where to get the 12V source for VDO voltmeter?
Daughter’s ‘92 240 sedan, 5-speed, came to us with a VDO voltage gauge in the dash at the right side of the cluster. But it’s not connected to anything yet. Gauge has three pigtails hanging off the connector plug. It looks pretty clear which terminal and wire are for what. But I don’t see an unused connector harness in that area.

I expect to get dimmable illumination power by tapping into the dimmer at the left side of the cluster. But where is a good place to get the 12V power for the gauge? I’m pretty sure I can find a good ground location pretty easily.
--
Sven: '89 245 NA, 951 ECU, expanded air dam, forward belly pan reaches oem belly pan, airbox heater upgraded, E-fan, 205/65-15 at 50 psi, IPD sways, no a/c-p/s belt, E-Codes, amber front corner reflectors, aero front face, quad horns, tach, small clock.








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    Dash voltmeter power source? 200

    uid 2796's pic
    posted by  bulletproof on  Mon Oct 14 14:42 CST 2019
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    last visit: Fri Oct 24 12:02 CST 2014
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    Take a look at Art's account of how he did this.

    www.brickboard.com/RWD/index.htm?id=1438600

    Note that he does it independently of the dimmer. He says, "These accessory gauges never needed dimming, in my opinion..."

    I take that to mean the lighting in the accessory gauges is so poor you might as well not bother with the dimmer.

    Anyway, this method has advantages over the Volvo design, as he explains in the post.



    --
    '80 DL 2 door, '89 DL Wagon, '15 XC70 T6







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