Wiring Diagram - Jayco RV Owners Forum Jul 22, 2016Rob, sorry to hear that Jayco declined to send you a wiring diagram. So maybe you can have a friend call and ask for a wiring diagram for a 22FB that IS out of warranty--maybe a 2007 or 2008 model. Your friend doesn't have to actually have such a trailer, just call and ask for the diagram for an out of warranty 22FB. Good luck! _____Jayco build/wiring schematics, Jayco giving me a hard timeMar 25, 2018RV Wiring diagram (white board diagram).Jun 20, 2016battery wiring schematicFeb 14, 2013Jayco Schematics and DrawingsJul 03, 2012See more results Jayco Trailer Wiring Diagram | Free Wiring Diagram Variety of jayco trailer wiring diagram. A wiring diagram is a streamlined standard pictorial depiction of an electrical circuit. It shows the elements of the circuit as streamlined shapes, and the power as well as signal connections in between the devices.