front landing gear motor

Have you periodically lubricated the worm gear drive in the landing gears? I had an issue where without warning my landing gear jacks started binding severely when trying to raise the trailer. I'm wondering if yours are binding to the point it is causing them to draw excessive current.

If you can take the weight off the landing gear, as in hooking your trailer up to your tow vehicle, and then raising and lowering the jacks, it might tell you if this is your issue.