No Headlights or dash lights

No dimmer switch is why you have no headlights. Has no effect on dash lights though. There have been a few cases where owner was working outdoors in daylight. Their dash lighting was working just so dim it couldn't be seen.
Found old high/low beam in trunk so now I have headlights!!! ...thanks for the help !!!...now I believe still have no dash lights ...any pointers where I might start?