Today I feel like a very lucky guy. I got my bedroom slide problem fixed yesterday by the son of the friends we are visiting in Houston; actually Kingwood-Humble, suburbs on the North side of Houston. Their son is an A&P (Airframe & Powerplant) for United/Continental here. This young fellow (the boy) KNOWS mechanical and electrical systems. I think he dreams about these systems in his sleep!
I first showed him Steve's handmade schematic showing the color codes for all the wires at the slide switch. I already had the 12v panel open so he started checking for power there. He checked and found power at the panel and at the slide switch. Power was found all along the way to the slide motor area under the bed. Thus, the problem was not a breaker, fuse or relay. While under the bed he gently pulled on wires to be sure they were solidly attached. One wire was completely loose - the yellow wire. The schematic indicates the yellow and orange wires go to the limit switches, then to ground. So what we had here was an open circuit through a limit switch. This slide system REQUIRES not only power to both limit switches, but also (obviously) the brake (to release it) and the slide motor (to make it go). If one (of the two) limit switches becomes invisible due to a power loss, then the whole system becomes inoperable. The yellow wire was re-connected to the limit switch and the system is fixed.
On my coach the yellow wire is connected to the IN limit switch and the orange wire is connected to the OUT limit switch. The IN limit switch is the one located near the street side, or head end of the bed. The OUT limit switch is located nearer to the foot of the bed. Steve's schematic shows the these colors just the other way around. So, either Steve's schematic has it backwards or his definition of IN and OUT means to the inside (nearer to the foot of the bed) and to the outside (nearer to the head of the bed), respectively, rather than the IN limit switch and OUT limit switch. The boy had me go back to the schematic several times to verify which wire color went to which limit switch. He almost immediately noted (loudly) that either this coach is wired backwards or Steve's schematic was noted backwards.
It appeared the problem was caused by the wires being loosely thrown onto the floor under the bed. It appeared the detached yellow limit switch wire had gotten looped over the IN STOP (the stop that pushes on the IN limit switch at the full IN position). And over time that wire got stressed and finally pulled apart from its connection to the IN limit switch. The boy cleaned up the loose wiring under the bed, tied it down so it can't ever again move such that it might loop or hook on something due to moving the bed in and out.
And the cost, you might ask? I had to go to our friends house for the third night in a row of drinks, a great Persian-food dinner and sitting in their backyard just being friends in beautiful Houston weather. Did I mention I am a lucky guy?
PS If your coach has a breaker for the bedroom slide motor, then you won't have a fuse. The breaker acts as the fuse, so don't look for one.