I have an older pop up camper I purchased from Plemmons RV World, a Sun Valley. The dome lights currently do not work. I purchased a couple of bulbs thinking that may be the problem, but still no luck. Is there a fuse or another area to check?

If you have a volt meter, see if you are getting voltage to the socket. If not check your fuse box or breaker panel or battery source. I asume you are getting power to everything else?

Sometimes the fixture looses ground you may try to replace light or contact dealer for help

Contact service and check the manufacturer web site for support.

They have a great service team I'm sure they'd be happy to help you.

Got me call and ask them