If resistance is greater than 5 ohms, repair open Red/White or Pink/Orange wire. If resistance is less than 5 ohms, repair/replace instrument cluster. Disconnect instrument cluster harness connector C237. Check Red/White Wire & Pink/Orange Wire For Open - Turn ignition off. If resistance is less than 10 k/ohms, repair short to ground in Red/White wire. If resistance is greater than 10 k/ohms, repair/replace instrument cluster. Measure resistance between instrument cluster harness connector C237 pin No. Check Red/White Wire For Short To Ground - Turn ignition off. If temperature gauge does not indicate hot, go to next step.ģ. The sensor is located near the front of the engine on a coolant hose fitting. If temperature gauge indicates hot, replace coolant temperature sensor. Bypass Temperature Sensor - Connect a jumper wire between the 2 pins of temperature sensor harness connector. If temperature gauge does not indicate cold, go to step 3).Ģ. If temperature gauge indicates cold, go to next step. Turn ignition off.ĭisconnect coolant temperature sensor. Let us know what you find.ĭisconnect Sensor - Ensure temperature sensor connector is in good condition. Since we do not know where you are, in the US Autozone offers a free OBD scanning. As for the engine light, have your vehicle scanned. Also, make sure that your engine block has a strong ground, You could temporarily connect a jumper cable from the negative of the battery to the engine block. If temperature gauge does not indicate cold, go to step 3). Make sure that it is one for a gauge not a temp light. This from the repair manual: Disconnect Sensor - Ensure temperature sensor connector is in good condition. If it does move than consider another different sender. If it does not you may have to replace your instrument cluster. That would mean your gauge at least works. Also, there are many fault codes that can be set related to temperature sensors, and they mean very different things.Remove the sensor wire and ground it, the temp gauge should move to HOT. First we have to rule out wiring and connector terminal problems associated with that part. RockAuto ships auto parts and body parts from over 300 manufacturers to customers doors worldwide, all at warehouse prices. They only indicate the circuit or system that needs further diagnosis, or the unacceptable operating condition. Fault codes never say that on any brand or model. The last concern is the diagnostic fault code did not say to replace the sensor or that it was bad. It's much more common to find spread or corroded connector terminals that aren't making a solid connection. Ford did have a lot of trouble with the two-wire sensors in the early to mid '90s, but other than that, temperature sensors have an extremely low failure rate because there's just one component inside them. The other is for the Engine Computer and will always have two wires. One is for the dash gauge and will have just one wire connected to it. The next problem is there are usually two of them. With inline engines, they might be found on the side of the block. On V-type engines, you might also find them on the intake manifold. At this point I can't show you were they are, but you will usually find them close to the thermostat housing at the end of the upper radiator hose. They do make reference to two other coolant temperature sensors, but they aren't even shown on the electrical diagrams. There is a cylinder head temperature sensor indicated at the bottom / center of the first drawing. The first one is there is no drawing that shows the location of the coolant temperature sensors.
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