There seem to be some electrical devices on my 5th wheel that work only on battery and some that work of battery and AC. I recently discovered that my leveling jacks don't operate even though my battery is successfully operating the slide-outs. Plugging into AC power did not change that. The jacks worked fine the last time I hooked up so what am I missing?
If you are talking about the stabilizer jacks like in the rear, maybe they sat and got all corroded up. I happen to know a guy that let his do that. :S
My stabilizer jacks have self resetting circuit breakers so you should hear some kind of click when you push the switch to go.
Once I got mine freed up and oiled they were happy.