WELCOME TO IRV2
--You probably would have to go to work for Newmar to get what your looking for, I have never seem a wiring diagram for any of the three Newmar's I have own just what they provide in the manual. Most wiring is identified by small print on the wiring,for what ckt its for. Useing glass's an magnifier you can maybe make it out
You didn't say what you are looking for but if you discribed what it was, maybe someone could help you, we are all eager to do that.