If the motors turning and the slides not sliding, it has to be a broken part like a shear pin near the motor.
Some people actually remove the motor and hand push them in/out . I dont know how to get access to a BF slide motor, i can only forward the links i have on slides. Hopefully one piece of info in them might be of help .
Bob
http://www.happijac.com/index.php/2011-08-15-13-57-08http://www.youtube.com/watch?v=H0ETwE3SrCMhttp://rvtipoftheday.com/general-tips/rv-slide-out-operation-and-troubleshootinghttp://www.rv.net/forum/index.cfm/fuseaction/thread/tid/24179143.cfm
