I have been having a problem with one of the slides on my 05 Fleetwood Pace Arrow On occasions {4 times} the bed room slide did not want to come in, if I leave it for about 15 mins then try again it...
First thing I'd do if the motors are the same for all your slides (mine are) is swap motors and then check the operation. Most elec slides have controllers which limit the amt of elec resistance to slide movement. The controllers are usually adjustable pots that you can very carefully adjust to fix a slide that won't go in/out correctly. Sometimes the controllers are bad and can checked by swapping them out as well.