Check for a sender unit in the thermostat housing either at the base of the top hose or at the base of the bottom hose where it attaches to the block. It will have 1 wire and it normally slides on but some may have a small nut on a terminal
Ground the temperature gauge wire to the engine using a jumper wire, then watch the temperature gauge needle. If the gauge now reads Hot, replace the temperature sending unit. Check the fuse for the temperature gauge circuit. If the fuse is good, check for voltage at the ignition terminal on the gauge with turn the ignition key to the "on" position. Using a voltmeter. If there is no voltage, there is a problem in the circuit between the ignition key and the gauge or the fuse panel and the gauge temperature. Fix the problem and test again. If there is voltage, replace the gauge.
SOURCE: coolant temperature sensor location for 1999 Dodge Durango
The sensor is right next to the heater hose outlet on the front passenger side of intake manifold. It is very small with an oval shaped connector going to it. I have the same engine.
SOURCE: where is the speed sensor on a 1995 Ford econoline van
the sensor is located on the driver side of the transmission case
SOURCE: The outside air temperature sensor for the 2003 Camry
the sensor is located in front of radiator if you open hood and look down behind front bumper you should see it, or look from under the frt bumper, it easy to change, also get part from dealer it not $$,hope this helps.
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