[DonSor]

Your coolant tempt. sensor should be located in the vicinity of your thermostat (upper front of the engine). Once you locate it, disconnect the wire from the sensor. Turn your ignition key on without starting. You should have power in the wire. At this point your gauge should read max. Then short the wires to ground and again turn your ignition on. It should go minimum. If it does both, your gauge is OK but your sensor is bad. You may also remove the sensor and test it by reading resistance while immersed in hot water.