Landing Gear Motor Fail and It's not the Fuse

I had a similar thing going on today. My electric rear stabilizer jacks would not Extend. The motor would crank when I pushed to Retract; but, when I pushed it to Extend there was nothing. I unscrewed the switch plate and and pulled the wiring out. The Extend conection was corroded. I just wiggled it a bit and it worked. So I took all 6 wires connections apart and scraped all the connections so they were shiny, then retaped with electrical tape.

So you might just take apart all connections one at a time and you might find the problem.