The manuals for the individual appliances are available from each manufacturer.
If you do somehow find the manual for the motorhopme, it will more than likely be mostly useless. Such manuals are not written for each individual model, but for the entire line of motorhomes from that manufacturer. Therefore, they are more often than not very generic, and will seldom answer any question you have.
I have the full manufacturer's package from Fleetwood for my coach, including the pamphlets for each appliance, even the outside rear view mirrors. The actual Fleetwood Southwind manual gives little or no information. No wiring diagrams, no plumbing diagrams, not much of anything of use.
Good luck.
CM1, USN (RET)
2017 Jayco TT
Daily Driver: '14 Subaru Outback
1998 Dodge QC LWB, Cummins, 5 speed, 4X2
2 Kawasaki Brute Force 750 ATVs.
Pride Raptor 3 wheeled off-road capable mobility scooter
"When seconds count, help is only minutes away!"