The fuse in located under the step, it has to be extended to get to it easy. You should oil all the hinge pins at least annually, bi-annually is better. Make sure if you do oil it, the switch is off, and it's extended, makes it easier, so keep the door open when you turn it off. Watch the door when moving out of being under the coach, its hard on your head. And if it was me, I would keep the mechanism factory since any warranty on the new motor assembly would extend to the wiring, etc.
Monty & Janet - 2007 Alpine APEX 40 MDTS
S/N - 75715 - Retired - Master Certified RV Tech