2005 Lincoln Navigator Power running boards

Need wiring schematic. And help to figure out way they don't work properly.
The drivers side:
When you open the door the board comes out but goes right back in.
Passenger side:
Nothing at all. Has power but nothing happens
Had them both apart cleaned and greased. Without the drive motors on they move
In and out with ease. So no binding.
I have taken the tops off the large worm gear and clean the plate that the magnet senses.
No difference.
Does the motor work by sensing the metal plate that moves or does it measure the amp load on the motor?
Or both? Help