Think seriously about yanking the dash and doing a "mini overhaul". After all, how old, again, is it?
Problems:
Obviously bulbs and sockets, weak socket springs and contact fingers and corrosion.
CORROSION on the PC board where the sockets contact. Use an eraser to buff up the copper
Harness connector pins: These should be soldered especially if any looseness
Gauge IVR (voltage limiter) Replace with an aftermarket solid state one, and solder jumpers across from the PC board to the contact fingers in the board where the IVR inserts. These lose contact
Gauge studs: These are "fake" nuts and get loose and corroded. Loosen/ tighten them several times to scrub corrosion off the copper, and consider replacing the nuts
Here's an old but very valid thread on doing PC board repairs:
Printed circuit pins repair
While you are at it read the MAD article about the ammeter problems and have a GOOD look at the ammeter wires and connections, and look for any heat damage/ looseness
Catalog
