I didn't look it up but I am sure that if you go to Winnebagoind.com you can find the parts manual and the electrical manual. I know that the manuals will give you the part number and the location of the circuit breaker/fuse for the motor. I don't know about W22 trucks but most of the trucks in that GVWR range didn't come with power windows. I know in my Winnie (F53) there isn't any fuse in the factory fuse blocks.
The Winnie manuals cover both chassis. They can be downloaded as a PDF. I carry a set on disc in the desk on passenger's side.