I found your comments on talking to people who know the coach interesting. I blew a fuse on the Beaver in a campground and spend most of a week crawling underneath on gravel in 50 f weather in pouring rain...... finally I got the right guy (he'd been on the line when my coach was built 14 years earlier)on a call to the Beaver help line which was in those days operated by Navistar and discovered that a fuse box was hidden in the wall beside the driver. It turns out that if the main starter cable ends corrode, the amperage goes up and eventually blows the fuse.......So the two days I spent on my back in the wet cleaning the ends with a wire brush lowered the resistance (both electrical and mine to pneumonia) so that when I found and replaced the fuse it didn't blow again. It was his third attempt to help me, but persistence paid off.
Yes, knowledgeable people do help....but who'd have thought that a 14 year old coach from a bankrupt maker would have that support?
