Hello Jack, and Welcome !
You will need to give us some more details to help identify the camper. Over the years there are multiple possibilities. There are typically two parts produced by different companies -
- the motor, drive-train and frame plus suspension, axles and so forth (like on a car)
- the house body with the beds, cabinets, roof and walls.
You can start by listing all the "names" that appear on the exterior, this would help identify the manufacturer, the make and model.
There may be additional information inside the glove-compartment / map-box. Sometimes there is information on the vehicle door frames or door edges. Inside some campers there is an information sheet attached to a cabinet door, perhaps the one under the kitchen sink.
Then, in addition to the two companies building the basic shell / structure, there are different sources for the 'hot water heater' / boiler; for the furnace; for the refrigerator, and so forth. This will require seeking out the labels their makers attached to them.
With that information, someone here may recognize what you have and be able to direct you to a source (perhaps a web-site) for documentation or a user manual.
My signature used to include a link to my personal web-site - - - however: