While you don't mention the brand or model #'s of the steps, I'll assume they are Kwikee steps. If so, they are now owned by LCI (Lippert Component Industries) and they have a great web site with helpful information such as the owner's manual and a troubleshooting guide.
I suspect, as Morich suggested, that some sort of wiring work will need to be done even if it is just a temporary fix.
Good luck and let us know how you make out. It helps others with the same or similar problem.
2015 Itasca Sunstar 35F