You don’t give us much to go on…. Start with checking the fuse. Does everything else work so you know it’s not the battery. Check the ground wire. Check to see if they might just be jammed. Have you been keeping up with the lubrication schedule? On mine you can disconnect the drive mechanism by removing a cotter pin and a linkage pin. This will let the steps operate manually-which can save a trip - but also will reveal whether the motor and transmission are functioning when unburdened. If it’s like mine there is a large and rather fragile plastic gear that is prone to shedding a tooth or two. If you find that to be your problem there is little alternative to just replacing the gearbox. It’s easy to do and not terribly expensive. Really, you’ve just got to take the time to do ordinary trouble shooting. Good luck.
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