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1 Post By spdbrake
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08-11-2022, 09:39 AM

spdbrake

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Join Date: Dec 2015

Posts: 1,442

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The black wires are usually daisy chained grounds for lighting.

Voltmeter Gauge wiring here.
https://www.vdo-instruments.com/medi...0Voltmeter.pdf

You can add a ground to the cowl square bar behind the dash with a #21 x 12" bit. https://www.homedepot.com/p/Drill-Am...1221/305287325
Tap to a 10-32NF Or use self-tapping screws (not a good idea).
If going to 10-24NC use a #25 x 12" bit https://www.homedepot.com/p/Drill-Am...1225/305287319

I like to use tap sockets https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Ozzie Goat likes this.

Last edited by spdbrake; 08-11-2022 at 11:25 AM..

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