The oil temp guage on the 505 SRDt ('85) has stopped working, I assume it is the oil temp sensor on the base of the oil filter. There are three sensors on the base, one on the RHS and two at the back . (The haynes manual is no help, it shows an oil filter housing with not one sensor on it.)
I think the one at the front is something to do with oil level and is linked with the coolant warning. At a guess the smallest of the two on the back is my pick, 13mm approx., looks similar to a coolant temp sensor on a GTI. The wiring is held on with a small nut. No idea what the other sensor does.
Anyone confirm which is the oil temp guage sensor?
Is there a simple way to test it?