Friday when I went to hookup to leave for camping my Ultra fab electric jack quit,I checked the battery connections and the fuse and all was fine,we where meeting friends so I did not have time to get to involved, so I swapped the jack back to the manual jack rather then removing my propane tanks so I could manually crank the Ultra Fab,Sunday after we got home I pulled the switch cover off the Ultra Fab and found that one of the black wires left loose off the switch,I soldered it back on and it works great again.