All my dash lights in my 49 3100 quit working. I think it might be because they are 6 volt bulbs and the truck was changed to 12 volt. I was thinking of putting led bulbs in it. At least I hope the bulbs are just burned out. Haven't really dove into checking it in depth yet. Truck still has all old wiring under dash so could be some other problem. Thanks for any info on this issue. Grady.