Any ideas?? Chassis Electrical Issue ?

[NCTom]

I called Ford Customer Service and the tech had no idea what was causing my problem. His only advise was take it to the nearest Ford Dealer. Called my closest dealer and waiting for a call back after the holiday.
In the mean time, I thought I would run my issue by the real experts. I truly mean this. This is my 3rd Class A, 2 Winnebagos and a Tiffin squeezed in between, and I can't tell you how many times I have issues that the factory could not answer and then went on line and solved my problem. I have even directed factory techs to this website for answers.
Anyway, I had returned from a trip of 150 miles the day before. The next day I went out to my storage lot to empty the tanks and put wheel covers on as I was not going to use the RV for about a month. My RV ran great on the trip.
Started the RV, pulled it over to the dump and emptied the tanks. Pulled the RV back into my space and and started to level the RV. Engine running, dash air on, all dash gauges working. I turn the leveler on and when I push the Auto Level everything shuts off. Nothing works. However, everything that runs off the coach batteries works fine. Tried Battery Boost, nothing. Call Ford, they say take to a dealer.
As I am locking up I pass the Chassis Battery Disconnect and just for fun decide to turn it off and on. I do and then go to try to start the engine. The engine started right up. Obviously turning the Auto Level on some how caused the Battery Disconnect to engage. I was afraid to try the Auto Level again for fear that I wouldn't be able to restart the engine the next time and I much prefer to drive my RV to the dealer rather than have it towed. I will try it again when I get on the dealer's property and don't have to be concerned about a tow.
The trip I returned from the day before was to get a new ceiling vent with a fan installed in the galley area. The vent that came with the coach did not have a fan. Thus a new electrical wire had to be run to the new fan. Could the installation of the new fan be part of the problem. Note that the new fan was also on when the engine died, and like everything else that runs off the coach batteries, continued to work just fine.
Any ideas? Thanks in advance for your time and help.

[twinboat]

A marginally bad connection at the battery disconnect switch or batteries.

If you can, remove the ground from the chassis battery and then see if the nuts on the back of the switch are loose.

If it's a small switch with thin wires, it controls a solenoid closer to the batteries. That could also have loose connections.

Ford may not find a problem, if it don't happen in front of them.

I would just go over all of the cable connections with a wrench. Just make sure the ground cable is off, you don't need sparks flying.

[OLYLEN]

WAG here but if the auto level had a problem and there is a resetable circuit breaker it might just be working correctly. But that means the leveling system would still have a problem.

LEN

[Ranger Smith]

It sounds like a bad battery disconnect switch or a bad battery connection or dirty ground from battery to chassis. We had a similar problem a month ago.