The Dome lights my dads 3500 have stopped working and haven't been working for a while and earlier tonight I decided to try to fix the issue before we start using it to haul our pulling rig for the summer. I have checked literally every fuse in the truck except a few i may have missed, all of them a good, checked the relays, all fine. The dome switch is not "off" and the lights will only come on if you press the button beside them. Ive done every thing i know to do, the only thing i think it could be is the dome switch in the dash has went out.

Any suggestions?