I had a similar problem with my rig. I have an in line 40amp fuse at the motor. It was good. I found that the air bags hadn't deflated all the way. I then pushed the level button again and the coach went down a bit and the level jacks went down, and was able to deploy the slide. Hope this helps.
Now in a Class C Coachman Leperchaun, trailer towing a 1950 Crosley Station wagon, or a '42 Pick-Up. Member of the Non-Affiliated Camping Group FMCA #F462997 RVM #146 Jon & Ellen