Turn signal switch, taillight not lighting up, no dash lights and more!

[Kern Dog]

If someone takes the time to try to help another person, their efforts should be applauded.
I always appreciate the effort even if it does not bear fruit.

 

[Bennoel 10]

Iirc one time it was a loose speed nut on the printed dash circuit board. I believe over time some corrosion hampered the connection ?