Changing from 6 to 12 volt. Have headlights, know the tails. Need numbers for dome, and dash lights. Dash quit working, think I blew them all on 12. I changed the one in ignition swith and that is only one I had. My heater runs on 12, two speeds. How long is switch and motor gonna last? I can get new switch, and motor too, but may run the six, long as it stays running. Changed the coil today, put on an alternator.