I feel your pain.
On the PDI of my used 2011 Greystone (purchased 9/17/15), I was informed there was a reason for a box of 20 fuses in the front battery compartment, and how NOT to need them. Well great!
Our first trip was 1300 miles from NY to home in FL. Third night on road, landing gear would not go down. No biggie, we didn't disconnect rig anyways, we got home the next day......now what?
Hand cranked the landing gear down, UNTIL crank head split! Finished the job with my hydraulic jack and went looking for the fuse. It was not the one the Tech pointed out, not the switch, oh wait, there's another in-line fuse on the buss bar. Odd indeed, but I found it and now it works just fine!
Out this week-end with the 5er, no problem with the landing gear, but one of the rear stabilizers was a problem. Loose wire at the motor. All is well for NOW.
Good luck with your problem.