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e vassar · 09-13-2020, 05:30 PM

It IS lighting. But not backlighting since it is digital. So when there is no power on the purple wire, the display is bright . When power is on the purple wire,the display dims.
My car has no master cut off switch and I normally do not disconnect the battery, the gauge will display forever, so I hope the parasitic draw is tiny.

09-13-2020, 05:30 PM	#3
e vassar Member Join Date: Jul 2015 Posts: 382 Likes: 67 Liked 271 Times in 107 Posts	Re: Digital Voltmeter Wiring It IS lighting. But not backlighting since it is digital. So when there is no power on the purple wire, the display is bright . When power is on the purple wire,the display dims. My car has no master cut off switch and I normally do not disconnect the battery, the gauge will display forever, so I hope the parasitic draw is tiny.