Are you looking for chassis or coach info?
If chassis, which make chassis do you have, searching for that should turn up a schematic. If it is for coach wiring, prints likely do not exist. Most coach makers do not have or supply any wiring schematics.
1995 Coachmen Santara 360MB 36' w/slide.
Ford F53/460 chassis, 2020 Chev Equinox "toad"