Leaving Beaumont, Texas on our way to San Antonio, the living room slide did not operate first time. After switching coach power off and back on it worked. Arriving in New Braunfels, TX, it refused to open. I guessed wrongly it was the switch. Removing the switch by the front door is easy. It tested out fine so I pulled more of the wiring out to check it, and found an inline 15 amp automotive fuse. I pulled it out and reinserted it. The slide then worked perfectly and continues to do so.
Perhaps this "cure" will work for the bedroom slide which works, but is rather slow!!
After finding so many of the halogen ceiling light connecters corroded, I think the first thing we should suspect, if something doesnt work, is the connectors. Ultimately I will be replacing these spade connectors with Ancor marine quality units .