Unless the documentation was a LOT better back then, I don't give much for your chances. As I understand it from what other members have posted, things are wired up to a factory schematic without any regard for wire color codes.
Also, if my experience with FR Georgetown is any measure, the "Owner's Manual" is so generic that it's only good for lighting your campfire.
Frank and Eileen Damp -Anacortes, WA.
ex-pat Brits (1968) and now ex-RVers.
Two elderly male yellow Labs, both adopted,
2002 Georgetown 325, Ford F53 with V10, sold on 08 Dec 14