voltmeter question

[woa_its_j3ff]

what exactly does a voltmeter (volt meter gauge do)?
I had this put on my car basically cuz i didnt want just a single gauge on the A-pillar, but i never really got to knwo what the function of it was.

i mean when i start the car the needle stays in one position, it never moves.. is it supposed to move later on if u install more electronics or what?

[coldspikee]

are you for real come on

[woa_its_j3ff]

^simple question. just want an answer. dont got one dont reply. thanks.

[lilmike2069]

It simply measures the difference in potential parallel to the voltmeter

[woa_its_j3ff]

^ it doesnt have to do with the battery and wutnot?
i heard that in the mornings when its cold when you start it, the numbers read lower.

[Sentinel]

While the above answer is technically correct, it assumes you know whats what.

Basically: If your car is off you should see ~ 12.5 volts, and once you get it started you should see ~14.5 volts.

[woa_its_j3ff]

when my car is off. it reads 0. the needle just turns off (or however u say it)

when it start it in warm weather like right when it came out of the shop it went to about 12, then moved slightly to the 14 area.

[NeFaRiOuS_SLE]

What is the other gauge? If you have a boost gauge, you should've just gotten the A/F ratio meter (or vice versa); I fail to see too much use for a voltmeter.