Don't know IF this will help as it's the 540 BUT
"
The original location of the bed
fuse was in the space behind the panel in the locker under the bed closest to the driver's seat, i.e. the locker that drops with the bed. There are four screws holding the panel in place. In later models Bailey moved the
fuse and it is located close to the consumer panel - this is where it is in my 540. Our second night away on our first trip, the bed failed to drop - at this time I was unaware that the
fuse had been moved so having investigated the panel and found the
fuse not there I wound the bed down using an electric screwdriver. found the
fuse the following day and replaced it 25amp. Bed worked without fault for the remainder of our time on site but following journey home it was found that the
fuse had blown again. No idea why and so it is question for Bailey.
The wind-down screw is concealed under a blanking plug to the rear on the underside of the bed lockers on the driver's side. You need a socket to wind the bed down - when I tried this (before going away) the bed came down ok but trying to wind it up resulted in the hex nut unscrewing - fixed this with some loctite."