Had left the Kwikee step on our motorhome extended after returning from a recent outing. Went to move the coach and the step remained extended with the ignition switch on. It should have retracted with the Ignition Override.
Found a 74 page Kwikee Service Training Guide in .pdf format covering all step series which was very helpful and have provided the link here.
Also found a very helpful video covering testing of all the Kwikee step controller operations.
Ordered the four way pigtail on the internet for $12 and free shipping needed to perform these tests. Extended the pigtail wiring to make it easier to reach a test battery. (see picture of this wiring harness and separate ground wire)
Bought a two prong plug from NAPA auto parts matching the step motor plug and made a pigtail to isolate the motor from the controller and test it separately with a battery. (See picture of pigtail below.)
With the test pigtails and wiring harnesses in hand began the diagnoses of the problem.
Removed the step linkage from the motor and examined the step movement. All pivot points were secure and the step moved freely. Unplugged the motor from the controller, and plugged in the two prong wire harness to the motor. Touched the ends to the battery and the motor refused to move. Reversed polarity with same result. Removed the motor from the underside of the step and "bench" tested it on the ground free from any restrictions. The motor ran fine in both directions.
Reinstalled the motor, hooked up the step linkage, and using the pigtail to the battery tested the motor again.
Happy Dance. The steps worked. Plugged the motor back into the controller and operated the steps with the door. Tested the "auto extend" feature and the ignition override. Everything worked as it should.
Do not know why the motor was "stuck" possibly the drive gear was jammed against a tooth in the sprocket plate it drives. Learned alot more than I needed to fix the problem and now have a test harness if I ever need to test the controller and all its functions. Passing this experience and links along for anyone who might be confronted with a Kwikee step problem that these resources address.