The Forest River owners manual is generic across all their lines. There is not one just for your particular model. Click on the link in the right hand side of the home page for a 2004 manual. It is as accurate as any of them (meaning its generally worthless). It is listed under Helpful Files.
Each of the components on your trailer (refrigerator, air conditioner, etc.) will have their own manuals. If you do not have them, you can may be able to go on line to each manufacturer's website and down load them.
Any other issues you have with your Cardinal, ask here. Someone should be able to help.