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...
I had a similar problem with my 2003 Bounder. The relay on the controller board was failing. You may have the same setup where the controllers for the slides are next together, if so swap the 6 wire plug between them and use the other switch to run the slide in, then put the plugs back. If this works then you need a new controller relay board.