We had a similar problem occur shortly after the purchase of our coach where in the ignition switch jam nut on the back of the switch housing was loose allowing the entire housing to rotate. This resulted in pulling the wiring harness in a manner that while not shorting out was cause for the slides to not work. Solution was we took the coach back in to our dealer and they tightened the jam ring type nut that serves to keep the housing in the proper position. Since then, we've had no issue with the ignition switch on/off positioning.
On our coach, it required them to pull the dash instrument cluster and radio/nav system panels off in order to reach the back of the ignition switch and also required use of a "special tool" made by Spartan.
Finding The Roads That Await Us
Rick & Lydia Williams
2018 Newmar Essex 4553
NKK Member 21619 / FMCA Member 465836