Done and Done. It all works. Lubed it with Blaster Brand, Chain and Cable Lube. A little hard to describe, best might be "Gear Lube in a Spray Can." Sprays on, but a film of thick oil remains after a long time. I bought it for bicycle sprockets.
It seems I can follow the troubleshooting for what seems like a later version of Kwikee steps. I noticed the Control Unit on our steps does not have the extended mounting tab on one side like the ones I see pictured for sale. Rather, the one tab on the wiring side, is just an "ear" like the two on the other side. Motor doesn't look like the popular ones either.
It was useful to know the Door Switch is Normally Open and provides a Ground Signal.
But, didn't need parts on this one. Just DVOM and some connectors.
Thanks for everybody's help!