my sunroof starts to open then stops so i dont want to burn the motor what can on 2000 Mercury Cougar

it starts opening and the stops i dont beleve its the motor what can it be

mine was doing the same thing a friend shared with me how to replace the fuse for the sunroof the fusebox in my cougar is located just under the steering wheel to open just pull the release lever and replace the right fuse. So I replaced the fuse and it works fine hope this helps you out .