My instrument lamps are fine.
The Bulbs could be past their sell by date and smutted up on the inside of the glass. Or even the wrong bulbs.
Corrosion on the instrument case metal eating some of the juice - take some scotchbrite to it.
Wiring seen better days
Pot chucking out to low a voltage.
What is the volts on the ciggy lighter with engine running should be about 14.5
