We keep our MH in a storage yard during winter. I charge the batteries every two weeks with the generator and run the motor. Now the last two times I did this the step would not come out when I turned...
I would try and operate the steps while the generator is working - if it won't operate with the converter functioning it's likely a non battery related problem. Also - clean the step ground - it's exposed and subject to corrosion and likely one of the top reasons for step related problems.