ac outlet inside not working

My neighbor has a 1999 Fleetwood Elkhorn camper. The ac outlets on the wall where the cab over bed is have no power to them. They used to work now they don't. The circuit breakers are all on where the fold down panel is and all the DC fuses are good. I've reset all the circuit breakers and still no ac to outlets. AC is getting to the camper because the air conditioning unit and microwave work. We would appreciate any information about what to check next as to why no power is getting to this outlet anymore.