I have a similar problem.....93 Ranger that the temp gauge doesn't work. The engine doesn't overheat. I see different ohmage readings when engine is cold and when it is warmed up, so seems the temp sensor is operating ok. The reference voltage on the temp sensor wire is 5 volts with the key on. Where is the fuse wire located? thanks.
My email address is: earl@ccny.com
Sender unit defective sender unit disconnected wiring problem dash to sender rear dash connector problem defective guage
Sounds like a wiring or sender unit problem. Ground wire at sender unit, see if it stays steady. If it still jumps around, wiring/gauge problem. If it stays steady, sender unit should be replaced. Good idea to do an oil pressure test as well.
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.
Wiring diagram of what component?
Wiring or sender unit in the tank.
A wiring diagram for a 1994 Ford Ranger can be found in the Chilton's manual for that vehicle. You can also find this wiring diagram at most auto parts stores.
A Ford Ranger pickup truck wiring diagram can be obtained from most Ford dealerships. The wiring diagram can also be found at most auto-parts stores.
you have a wiring short somewhere. try running a new cable from the sender to the gauge
To fix a Ranger stereo, the steps will vary depending on the type of problem you are having with the stereo. If you are not getting sound to the speakers, you might need to replace speaker wire or check the wiring for bare areas.
U might have a serious wiring problem, or your need to change your brakes.
The wiring harness can be checked to make sure it is securely plugged in. Also checking the wiring with am electric meter will determine if the wiring is bad and is the problem.
There is no such thing as a free wiring diagram