Step switch has 2 positions. 1st- Steps open and close with the door. Ignition on or off.
2nd-When the Door is opened with ignition off, the steps extend and remain in that position until ignition switch is turned on.
Step controller uses a magnetic switch in the door frame to determine door position.
Fuse location varies, some have fuse under the steps or look for loose connection there. Another Fuse is usually in chassis fuse panel, not coach.
U.S. Coast Guard retired- 1956-1985
Lily- the Pug
1972 Moto Guzzi Eldorado