KC, you might turn off the Coach Main switch in the battery bay first, to avoid arcing when you jump the leads. I'd use a jumper wire that's at least as big as the existing leads, although the switch is really only a low-amperage one that, as Steve notes, sets off a latching solenoid on the wall in the BigBoy/Fuse Buss compartment above the batteries.
The one time I had similar issues I just happened to be at BCS. They serviced the switch, and changed out the solenoid just to be sure. As I've reminisced on the Forum before, Ken pulled no punches about owners' use of that confounded "salesmen's" switch by the door; leave it alone and only use the Main Switches to shut down and revitalize your coach. I'd be surprised if he didn't offer similar commentary during your conversation.
The door switch was meant only for infrequent use on dealer's lots and doesn't stand up to repeated wear by owners. So for others relatively new to ownership, whose switch has yet to become an issue, please leave it in the ON position 24/7/365. If you're ambitious enough, jumpering it can avoid young kids' misdeeds and your inadvertant deactivations while fumbling the doorway switchline in the dark.
Joel