The Temp Gauge on my Mf 398 has not worked in many many years. Thought I would have a bit of a fiddle. Assuming there is a wire that goes to some form of sender somewhere. An initial 1st look about can’t see any wire at the rad cap, bottom of rad or near the pipes that I assume is the water pump, though will admit it is a dark old hole looking at it in a shed and the loader restricts things further of course. Can anyone tell me where it definitely is? Thanks.