Quote:
Originally Posted by 63unibody
Sounds like the resistor might be bad?
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These resistors
usually fail open circuit, resulting in the gauge not responding at all. But it's possible that the resistor failed and someone replaced it with an incorrect (higher resistance) one off a different gauge. Or like
VetteVet said, there could be some extra resistance in the circuit (due to corrosion, weak connection, etc) that is causing the abnormally low reading.
Another possibility could be that someone removed the needle (maybe to repaint it) and didn't position it correctly when they put it back on. They're just a press fit onto a tiny round shaft.