Traced out our wiring and building my own diagrams for the future...I guess they don't want to be blamed when there is a "slight" variation on a wiring diagram or the color of a wire is different than what might be spec'd....I too don't understand the reluctance, as there are some manufacturers that do release their diagrams.
Walter & Donna
2011 CC LB RAM 3500 CTD 6.7L DRW
2013 Cedar Creek 38FL
2014 Days Camping: 35