This applies to the Clipper, but other models may have the same step.
I have been having intermittent problems with my step not operating as/when it should. I had purchased a new motor some time ago and decided to install it for this travel season.
Replacing the motor is not a big job with only 3 mounting bolts to undo and the wire harness to be separated.
Gently wiggle and pry the old motor away from the gear face. Clean the gear face and lubricate before installing the new motor.
On the CLIPPER the KWIKEE step is a "series 42" and it takes the standard motor. (series 23 triple step requires the high torque motor
The motor that fits "series 42" is "Dorman 742-206" for the 95-86 Taurus, Sable, 93-88 Continental. Drivers window lift motor. SKU 1330206-E6DZ5423394A-742-206-TAURUS-2
Page 5 of 20 shows the picture.
When reinstalling the motor, be sure to use some anti-seize on the threads so that it will be easy to remove the next time.
However, after finishing the installation, I still had the same problem. I tested the old motor and it seemed to be OK when tested with no load. So I had to troubleshoot further to find the problem. I discovered the main 4 position power plug had deteriorated and good contact was not being made.
Rather than replace the plug, I just cut it out and butt connected the wiring and heat shrinked the joints.