Well I need help again with my slide my friends

If it is the BAl Accu Slide:

Maybe one of the cables has frayed and sticking in the roller that guides it in the frame.

If you cant find anything binding the slide anywhere, try bypassing the motor to open and close with a drill and the tool provided. (when I purchased my rig a tool for this purpose was included). If not you may be able to order one from their website or you trailer manufacturer.

If it runs in and out freely in this manner then it has to be the motor going bad.