Also, there may be a slide control board, not shown in above link, that has relays, and additional fuses & breakers for slide motors. Two relays run each slide motor, one for in, one for out. My model is not the same as yours so I'm not 100% sure on this, but above link shows no slide motors control circuit. I had similar problem once and it was an intermittent relay.
Ellen & Greg
08 National Dolphin DL-35Ci, RoadMaster Rear Sway Bar, Rear Trac Bar, Koni Shocks Front,
Workhorse W22, Kelderman Air Ride, Towing 2016 Smart Car