We turn off the battery switch (coach batt) inside the little panel to the left of the entry when we are parked at home and plugged into 50 amp. Recentlly forgot to turn it on and started out on a trip and noticed that the step did not work.
Figured out the switch was still in the off position. What else does that affect? Would it have anything to do with fuel or fuel pump? Or is that on a different circuit altogether? Thanks!

My coach battery switch located as yours is, shuts off everything operated by the coach battery. Normally that would include electric steps.

Normally, an electric fuel pump would be wired into the engine electrical system, hence unaffected by the the coach battery switch.