On my Winnie the Disconnect Switch is a latching relay(solenoid) and it seems to be that it could be hooked up wrong. There is a fuse on the relay and a wire for the actual on/off switch.
If you know enough to look at the relay, and follow the wires, go to Winnebagoind.com, go to resources and download the wiring for the 2006 Voyage. It may seem different than some schematics but it is fairly easy to follow.
The first check is to open up the compartment where the disconnect relay is and switch it on and off. You should feel and hear a click. I don't have my book open so I don't remember the color of the wires and switch.
Should be easy to trace.
If you don't know what to look for, get some help from a technician and have him show you what he is doing. It's your $125.00 an hour, he should let you watch and learn.