I wish you luck on getting a schematic out of most any RV Mfg... and if you do get one, please share. I agree they would be most helpful for users that are capable of using them. I have heard excuses ranging from liability, every unit is built slightly different (probably a good bet), we don't have them, etc.
I have started to build my own, based on the CC 38FL. With winter and all I have not had time to update these as I plan on adding in some additional details around the electrical work in the front storage area where the hydraulics and such are with our rig.