I looked up your profile and it says you have a Dutch Star. It would help if this information was included in your post.
So I am assuming you are referring to the foot rest. In which case have you raised the seat before operating the switch? If the seat is at its lowest point the footrest can catch the floor and this will cause the symptoms you mentioned.
John and Mary Knight
2015 Newmar Ventana 4311 - wheelchair accessible
2015 Cadillac SRX Luxury AWD