"RodHatter".....Mine had a switch at the base of the bed pedestal, but this was a Fleetwood. I would do as "Swampman" suggested and check for voltage at the plug, but my guess is there won't be any. It sounds like the plug is close to the generator. You need to follow it to the generator and see if there's a switch somewhere in between. If not, you may have a generator issue.
Hopefully someone with a Sea Breeze will jump in with the procedure to turn the generator on. See if you can modify the title of your post to "How To Switch Sea Breeze Generator". There are a lot of Sea Breeze and sister coaches out there because they were well made.