No instrument gauge lights or push button lights - 64 Dart

Hello all - I recently bought a 64 Golden Anniversary Dart Convertible. Test drove it during the day...and of course the only dash lights that work are the blinkers and oil light. The gauge lights and push button gear lights are not operable.

The high & low beams and courtesy lights work. I've taken the cluster out and checked the bulbs, they were fine. The fuse was fine. Cannon connector fine. I wiggled the daylight out of the head light switch, nothing. The car has 68k miles on it and is in great shape but it was around salty air it's whole life. I'm thinking headlight switch but don't know if that's feasible. Thoughts?

Any ideas would be appreciated.