side out

Just returned from a fabulous 4 day stay at Soldier Creel Reservoir, part of Strawberry Reservoir Utah. Stayed in a wonderful campground near the marina. Only issue we had with the HiLo was the activation of the side out gearbox motor operating in the "UP" position. The lifting strap had come...

It’s late and I’m tired. My slide out, refrigator, and steps do not work. I’m new to the RV world. Is this a blown fuse? My husband thinks the battery needs to be replaced. We are hooked up to power. Everything else is working. Any suggestions?