Falcon is a brand of Class B motorhome and they were made using either Ford or Dodge van bodies. Most of the controls would be the same in either, but of course the dashboard differs between the two vans. I think the Falcon manufacturer is a company called Intervec. I don't know of any source for manuals.
Some of the things like water pump or generator may have manuals from the maker of that item, so check the component for brand & model and search the internet. Most can be found. But the location and function of switches and gauges inside the RV are probably unique to the model 7 year, so you may be out of luck there.
Look for a Dodge van owner manual of the appropriate year to find info on the vehicle dashboard, engine & tranny, etc.
Post some photos of things that are a mystery to you and maybe we can identify some of them.