Two most common problems with electric steps are low battery and/or bad ground - check those. Also check the fuses. If those are OK you can check for "binding" by climbing under and pull the cotter pin that connects the linkage between the step motor and the step .. remove the cotter pin/round bar and the steps should move smoothly. You might try and energize the motor with the steps disconnected if nothing happens then you have to figure out whether you have bad switch, bad controller or bad motor. In the old days Kwikee used to have diagnostic pdf on their website .. not sure whether new owner continued the practice.