Ciolant temp sensors

just don't buy the sender from the auto parts store, I never found one with the ohm range that matched the specs

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Originally Posted by Dr_Snooz

Hal, the circuit is a simple one. The power runs through the gauge, down the wire to the temp sender in the thermostat neck and grounds out there. It should be relatively easy to test with a multimeter. Just see if you have power to the sender with the key on. If you don't, then the gauge is bad. If you do, the sender is bad.

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Exactly as snooz recommended, probe the sensor and turn the key on. You can monitor with clip leads and see if the voltage increases as the engine warms up ( resistance of the sensor should fall as temperature increases) and try correlating that to your dash temperature "reading".
Attachment 6688

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Originally Posted by lostforawhile

just don't buy the sender from the auto parts store, I never found one with the ohm range that matched the specs

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you ever think your multi meter(s) are not calibrated correctly / test procedure incorrect / or bad terminal / lead connections? Never had an issue with my 179 fluke, 87-V fluke or my blue point DMM or finding a sensor in range.