Jess

My oil temp gauge has decided to go to the max and stay there (ignition on or off).

Is this a faulty gauge or sensor?

Best way to test?

If I remove all wires to the gauge it will return to zero. If I reconnect the wires it stays at zero until I switch the ignition on, then it rises to max and stays there.

Cheers

alcazar

iTrader: (2)

The only sure way of testing in a situation like you describe, is substitution: a new, working, sender first, and if that doesn't cure it, a new gauge.

I assume you have already checked the wiring: that it goes where it should, and that you don't have an earth fault?,( short circuit to earth in the sender wiring?)

Alcazar

Edited to say: with the manufacturers help, and a good multimeter, you could also test sender output.
My guess would be sender.

Jess

Thanks, Alcazar, thought it maybe a case of replace to test.

Guess I'll by a new gauge and sender kit and swop both.