I don't agree that it is useless but it is not a very good manual. We didn't always have it and they produced after everyone complained about no manuals.
When I purchased my wifes car a few years ago I also purchased the shop manuals for 200 dollars. Keystone could do the same and make a profit off it. I would certainly buy the shop manuals for my unit if they were available.
I think part of the problem is standardization. For example wiring color codes would be hard since the wires don't have standard colors. They use what wire they have.
If they standardized the assembly for each unit it would be a lot easier to make a shop manual. (ie wiring colors,plumbing,dimensions,part numbers etc) Otherwise each unit has to have it's own manual and that would be expensive.
Maybe in the future....Lets hope so.
Tom and Betty
1997 F250 PSD/AutoTranny
DIY Exaust Brake w/TC lockup
AutoMeter Tranny/EGT Gage
Translife Tranny Cooler
Superchips Towsafe
16K Draw-tite Slider
2000 Montana 2850RK