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Re: 12 volts running through temp sensor Posted by Ari [Email] ![]() ![]() In Reply to: 12 volts running through temp sensor, Steve Y, Fri, 21 Jan 2005 13:15:58 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Actually, 12 volts does run through the temperature sensor.
12 volts connects to the high side of the of the temperature gauge, and the low side of the gauge connects to the sensor. The body of the sensor is ground. There is resistance in the gauge itself; the resistance in the sensor changes as the temperature changes. As the sensor resistance changes, the current flow changes, and the gauge reads differently.
I assume that if you touch the wire to the engine block, the gauge pins on Hi. If not, then the problem is a short inside the gauge.
posted by 192.249....
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