Quote:
Originally Posted by Jack_71C10
I'm pretty sure both volt meters would always read the same.
Even though its a battery and an alternator, they are still one circuit.
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That's why you need two! They're not the same (which is how ammeters and idiot lights work) because of voltage drops in the circuit.
The two needles would show the biggest voltage spread and which direction it was in, so you'd know at a glance how loaded the system is, etc.
Of course I could try it with a voltmeter, which I think I shall when it cools off a bit!