A bad ground can certainly cause the control module # LC301702 of your steps to malfunction. I recommend grounding it directly to a bare-metal surface on your chassis to ensure a proper ground. view full answer...
Did replacing your controller solve the issue temporarily or were the steps still closing when the door is shut? If there was no change the control module isn't the cause of the issue. Typically a bad ground connection can cause steps like these to act out but I know we've talked about this in the previous question you asked so I'm assuming you already checked yours and it's still giving you problems.
From there it could honestly be the lock out switch. The internal contacts of the switch... view full answer...
If you can provide me with the part number for the control module that you replaced the Kwikee Step Control Module 1800709 wish I could then verify for you if the correct replacement was used but without this information there would be no way to do so.
I spoke to my contact at Lippert about the issue you were having with the lockout not functioning and they stated that you need to test the 4-way plug on the unit which can be seen in the attached photo. I have also attached a photo of the... view full answer...
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