Brnedan,

Sounds like an issue at the ground clusters behind the fuse block. Common
problem, windshield leaks on them. The big brown wires are the headlight
grounds. Crimp on a ring terminal and attach them to the chassis. I used
the big Phillip screws that holds the fuse box. Other possibility is the
headlight switch has melted down.

    Oil pressure and Temp gages are a good idea.

Ken Lewis
http://neksiwel.20m.com/