Some steps have an inline fuse. The steps are powered from the chassis battery, not the house battery. So check for 12 VDC at the steps themselves. If there - you have a step problem. If not there - trace the power wire back. I'm not sure what fuse block the power comes from in your coach. If you don't own or know how to use a multimeter and/or a trouble light now is a good time to get one and learn.
Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad
2020 Chevy Colorado Z71 Trail Runner Alternate Toad