All outlets work in motorhome, but no lights, a/c, or fridge,? Checked all fuses, and breakers.

. Check for a bad breaker--they do fail.

. Check all GFCI circuits, especially outside outlet boxes. Ants can build dirt mounds in a box, which can turn off an inside GFCI circuit. This commonly happens when the dirt gets wet. Therefore, check each outside box and ensure it's weatherproof.

120 or 240 volt? Could be a loose, broken or burned primary feed.