Another battery problem, don't know if other people had this problem. I kept haven't a blown fuse in the tow vehicle for the trailer. Which then drained the battery with the fridge on DC while driving. Finally discovered that if the trailer battery was just a little bit discharged, when raising the top the hyd. motor would try to draw power from the tow vehicle and blow the fuse. The fix was to unplug the tow vehicle before raising the top. This worked great except I kept forgetting to unplug. Finally installed a relay (Used 2- 30 amp auto relays) in parallel in the positive wire from the tow vehicle. Attached the relay coil to the relay on the hyd motor, so that when I pushed the switch for the top to go up the relay disconnects the wire to the tow vehicle. Problem solved. I will also be doing this to the new trailer.