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Temp Gauge

 
Old 02-09-2019, 03:16 PM
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CORVETTE DUANE
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Default Temp Gauge

Just put the blue wire going to the temp sensor direct to ground to find my problem with the gauge and my pink wire under the dash melted. Had to cut into the wire harness to see how much damage was done. Lucky it only melted that wire to where it has a three wire connection. Took the gauge out and run a hot wire to the one side and a ground to the other side and sparks came off the ground and the gauge did not move. So I guess that the gauge is bad? Did I do something wrong? This is on a 61.

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Old 02-09-2019, 05:06 PM
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65GGvert
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How long did you have the blue wire grounded before the pink wire melted? I think you need to make use of a multimeter and not connect 12v wires to ground or across gauges. Grounding the blue wire from the sensor momentarily to ground should have given you a pegged gauge, but not a melted wire. If you measure across the gauge connections with a meter, you should read a pretty low ohms value. If it reads infinity, you probably have open windings in the gauge. However, that had to be done after the grounding of the blue wire, or nothing would have happened since the gauge would have been open already.
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Old 02-10-2019, 01:54 PM
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It started to melt within seconds. Way would it not pegged when I put 12v to one side and ground to the other. Should I have not used the ground from the battery?
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Old 02-10-2019, 03:32 PM
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It should have pegged one way or the other depending on which polarity the battery was connected. To melt the wires in seconds, you had to have 12v connected directly to ground. Unless the gauge is in some way shorted or bypassed, it shouldn't have.
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Old 02-10-2019, 03:39 PM
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Frankie the Fink
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Originally Posted by 65GGvert View Post
It should have pegged one way or the other depending on which polarity the battery was connected. To melt the wires in seconds, you had to have 12v connected directly to ground. Unless the gauge is in some way shorted or bypassed, it shouldn't have.
I agree something is not making sense.
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Old 02-10-2019, 04:02 PM
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What is the best way to test it out of the car?
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Old 02-10-2019, 05:41 PM
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Originally Posted by CORVETTE DUANE View Post
What is the best way to test it out of the car?
Here is some sound advice on testing any of our gauges...

Not just gross operational checks, but tests for accuracy as well.
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