WINNEBAGO VIEW SLIDE OUT

Its probably an electrical connection tween the battery and the motor.
When all else fails, use process of bypassinization,.....12v hot wire directly to the motor,.....reverse polarity to reverse rotation.

Minor point: you should have the engine running while moving the slide so the motor gets full voltage.

Its very possible the gear track has an obstruction that needs cleaning, but the bad news is the motor could be fried. Does it make any noise at all when you try to move it?

I just responded to the other post erroneously it turns out.