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I have found a temp gauge out of a donor car. Is there a quick test I can do to the gauge to see if it is in working condition?
 

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You can connect the side of the gauge that goes to the sensor to ground momentarily. Needle will stay still for a short time and then move rapidly. Remove the short to ground when you notice movement. Don't hold it there for a long time or you can damage the guage. I have a little power supply that I use to test clusters, but any 12Volt source will do.
 
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