Not sure if everyone is aware (I learned this at the Tampa RV show) but Thor has a owner resource online for your coach.
WWW.Thormotorcoach.com/owner-resource
You set up your own account with your Vin #
It will have model and serial #s of things on your coach including Schematics of Elec,Plumbing,HVAC, etc.
Has downloads for EVERYTHING on your coach.