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Re: Volt Gauge 1985 Silverado
Here is a voltmeter. Not sure what year it is from but is likely similar to what you have.
Attached pics of front, back and connected to a 12V source. The blue thing on the back is the resistor. This one measured out at 125 ohms. Note that this one is reading 13V with a 12V input. If you don't have an adjustable power supply, you can use a 9V battery. Green = ground, red = positive.
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