Question about 1999 Ford Taurus

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CTS Check Does anyone know how to check the coolant temperature sensor in a 1999 Ford Taurus? I want to check mine to make sure it's working because I don't trust it much right now. I have a multimeter to be able to take the readings.

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Yes it is an easy check first test the switch cold the resistance should be high and then put the switch in hot water close to boiling point and take another reading the Resistance should be low if not then the gage is bad, if I remember right it's 200 ohms when hot but if you have an analog meter it Will just barely read Resistance when cold and swing to the right as it gets hotter just like a gage would, and if there is no difference then it's bad, it uses wax to expand as it gets hot if the wax has leaked out it will not change Resistance.

Posted on Jun 18, 2009

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