For starters I would suggest you visit Coachmen's website.
www.coachmenrv.com
AT the top of the page is a link for owners manuals, and it can go back to the 1980's.
Download the appropriate one for your model to understand how the units were designed to work at the time of construction.
Folks on here will be happy to help you understand anything the manual doesnt cover fully, but until you know enough about the syatems to use the terminology as understood by folks here it is difficult to help.
ie; electrical , there are three separate and distinct systems, chassis electrical, (the van systems) House 12 volt, and house 120VAC.
Understanding the basics from the manual will make it much easier to ask the questions you have in a manner that others can help.
