So, the only 100% consistant thing on my mini finaly stoped working. The temp gauge.
My '83 Mayfair has a dual instrument bezzel with the right hand gauge having the fuel and temp in the upper left and right. The fuel only reads about half with the tank full and the temp doesn't move at all.
The only recent change is a new ignition switch.
I unwraped and traced several wires and found no issues.