Intermittent Electric Jack Problems?
Electric jacks sure take the stress off. When we first started out, we had to use those horrific "freestanding" things that you took your life in your hands with, setting them under the sides of the camper and hoping they didn't fall over at the wrong moment.
Then we went to hydraulic jacks--that was the "cat's meow," until you started wearing out seals, and hydraulic fluid wound up being part of your wardrobe. It was a bit crazy, too, if you singlehandedly loaded or unloaded the camper: Running from one corner to another, trying to keep everything "on the level."
Then there were electric jacks: Switch controls, easy operation, not much running too and fro, and always clean. Unless you get an intermittent jack operation. Some users have reported problems with jacks stalling, bucking, and jumping. Here's something to check: Since electric jacks are electrically operated, tight connections are critical. Obviously a good solid connection to the house battery will affect all the jacks. If you get "sometimes" operation with some of the jacks, you may have loose connections on the switches, the motors, or other control panel connections.
Pull the covers and examine all connections. Solder joints can break or come loose with road vibration. Oft times, just that alone will cause all kinds of heartache.