Not sure about the steps on your coach but mine say to clean and lubricate with white spray grease every 30 days.
You might want to disconnect the arm that connects the steps to the motor and make sure the steps move smoothly in and out when then are disconnected from the motor. Make sure nothing is bent or binding.
If the steps move smoothly manually, then I would open and close the door to make the motor move to see if it moves smoothly in both directions without the steps connected.
I would also check the grounding wire. It would be worth taking it apart, cleaning the terminal and the mounting point and then using new star or lock washers and tighten it down. A poor ground can cause the steps to work erratically as well.
__________________
|