I have a 2002 Gulf Stream Scenic Cruiser, but the manuals don't really show that much information like what you want. Like the plumbing it will show a very skimpy diagram as to how the plumbing goes, and the wiring that you asked about is not there. Actually I have never used it. The cruiser is a good coach. Problems through the first six years have been mininal. Have 39K miles on mine now and it is running better then when it was new.
Good luck with yours
