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How do you diagnose a temperature gauge?

dbrannon79

I'm getting there!
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Most gauges work off from a ground where if you take the one wire lead on the sender and ground it with the ignigion in the run position, it should peg out ether at 0 or at max depending on how the gauge is setup. if the sender has two wires, simply jump the two together and see if it maxes out. also use a ray temp gun to verify accuracy at the sender.
 
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