Temperature gauge not working

Hi,

The coolant temperature sensor is near the thermostat housing. See picture 1. Now, check to make sure the connector is tight, not damaged, and not corroded.

Next, if you look at pic 2, it shows the connector, which has two pins. The one I circled is comes from the comp. Number 2 is the signal back. You should find low voltage to pin one. If you do, replace the sensor.

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Here are a few links you may find helpful:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-a-coolant-temperature-sensor-works

https://www.2carpros.com/articles/symptoms-of-a-bad-coolant-temperature-sensor

https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement

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As far as testing the sensor itself, basically resistance is tested in the sensor and it changes based on temperature. If you want to do it that way, it discusses it in the link about how one works.

Let me know if this helps or if you have other questions.

Joe