Quote:
Originally Posted by 1qikta
So if I have power into and out of the gauge....power all the way thru the sending unit..and a good ground at the tank(tail pan)..The gauge appears to work(plugged in)..whats left?
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That's about it as I recall without having a print in front of me. If you have all that and the gauge is all over the place, I would suspect the gauge.
It's a single line series of circuit.
Simplified, it's kind of like-
12V-----(+ gauge -)----(^^+sending unit-^^)--->ground.
Varying the resistor adjusts the current flow through the series circuit, moving the gauge.
Only three or four things to go wrong if voltage is present;
Bad connection, Bad gauge, Bad resistor(sending unit), bad ground.