Update:
Got new motor, installed it this evening.  Doug, you were right, it indeed was the motor.  New motor in, Steps work just fine now.  Woot! 
Putting in the motor was just as much a PITA as I remember it was last time.  Thought I was never gonna get all those screws, spacers all lined up and in place!  This time to make matters worse, holes in the new motor were too small for screws to go through, so had to get the drill out and carefully ream holes to make them ever slightly bigger.
Now, onto the next issue:  Leveling jacks just quit working, verified today it is indeed the motor that runs hydraulic pump.  Time to source yet another electric motor, order it, and put it in.  Ain’t one thing, it’s another, haha.
Anyone have a lead on where to get best deal on a Lippert motor, part # 414850?  Really don’t wanna pay $900 to buy it from Lippert.  Well, guess this is a discussion for another thread.
Thanks to all, especially Doug, for your insights and help with this.