1990 Dodge Xtravan Manual

[VanArtist]

Hello! I recently purchased a 1990 dodge xtravan in pretty great shape. I'm getting started on some cosmetic repairs and I realized I have the manuals for a lot of the different parts like the air-conditioner, fridge etc., but there are no manuals for the different systems like the water, propane, wiring. I was hoping someone might have some information on this, or possibly have a manual I could look at?

Thanks!