You have to decide whether you want an oil temperature or a cylinder head temperature gauge. The procedure's basically the same--run a wire between the engine compartment and the dashboard, install the gauge and the sensor, connect both to the wire, then hook up a ground and a 12v line. Oil temp sensors either replace the dipstick or go around the drainplug--I think the dipstick sensor is better because it can't be torn off if you hit a serious pothole. Cylinder head temp sensors go around your number-three plug.
If your temperature gauge isn't working the problem is a bad gauge, grounded or disconnected wiring or, most likely, the temp sender isn't working.
why doesn't my rpm gauge and temp gauge, fuel gauge not work
Is it overheating? If it is check the coolant level, waterpump, fan, etc. If not overheating check the wiring, temp sesnor, pcm, etc.
The temp gauge may stop working on an 89 Ford Bronco if it is defective, the temperature sensor is damaged, or the wiring has come loose. All can readily be fixed by checking each component separately.
temp gauge is stuck on hot
1996 prelude temperature gauge reads low temp
only 3 reasons a temp gauge wont work the temp sender is bad the gauge is bad or the wire from temp sender to gauge is broken
Your temp. sensor might be faulty, or the wiring for the gauge, but 9 out of 10 times this indicates air in the cooling system. Check the overflow tank. When there is HOT coolant on the sensor, it pops up. When air hits the sensor, it dives down.
the problem with your fuel gauge may be normal as my Toyota Camry does this also. On the temperature guage it could be a bad temp. sender unit, a bad gauge, wiring between the sender unit and the guage. Disconnect the connector at the sender under the hood (normally located in the thermostat housing) and see if the temp guage reads zero. If it does, it's the temp sender unit.
In most cases the temp sending unit has failed but, check the wire and connection at the temp sending unit on the engine. It should be clean and tight. You can check the temp gauge by disconnecting the connection at the temp sending unit and holding the harness connection to a good ground. While doing this have someone turn the ignition key to the on position (do not start the engine) and watch the gauge. If the gauge climbs up to the hot position the gauge is okay. At this point you can replace the temp sending unit with a new one.
This may sound like I think you are dumb, but I do not, I have been caught by each of these:Did you change the correct sensor? Both my cars and my truck have separate senders for the computer, the light and the gauge.Did you get the correct replacement part? An incorrect sensor can cause the gauge to: operate backwards, stick hot or cold, not operate at all. And to make this more fun the sender will look identical to the correct one except for the part number.Did you check the gauge while the sensor was unplugged? It should drop to cold when the sensor is unplugged. If not you have a bad gauge or a wiring fault, or both as a wiring fault can ruin the gauge.Final test, disconnect the gauge from the wiring at the gauge, does the needle drop? No then replace gauge. If does drop figure out where the incorrect indication is coming from.
The temp sending unit for the temp gauge is located on the drivers side of the engine between cylinders 3 and 5 spark plugs.