Happy Jack Malfunction
Got home yesterday from a long trip. In front of our house we start to unhitch our 30HDS and the jack won't function! The lights on the panel were flashing so I assumed the fuse was okay and didn't check it out. Called Happy Jack and they said it was a voltage issue and the problem was the battery.
Bottom line. It was the fuze. It apparently was connected (sending power to the jack), but it wasn't seated properly. Opened it up and it had somehow become dislodged. Works like a charm.