The brochure has some general drawings of what layers and materials are inside walls, ceilings, floors. Also a drawing of the welded cage of the entire unit.
http://www.dutchmen.com/media/5380/2007-grand-junction-literature.pdf I have not yet found a wiring diagram or any videos of people renovating the same trailer; such things would be good to have. I'll keep looking. Meanwhile, perhaps there is a Dutchmen-specific forum where there are people who could provide this info.
added on edit: Dutchmen Customer support page says they will provide archived literature if your e-mail them and include identifying numbers from your rig.
http://www.dutchmen.com/customer-service/
