on my 1989 Southwind the 20 amp horn fuse is hidden behind a plug in ckt. breaker on the under the dash fuse holder. It also goes to the cig. lighter and my CD player as well as the horn. It took me a while to find it.
As far as the ac doors closing going up a grade, a 5$ check valve fixed that at the vac reservoir vac inlet from the carb.
2000 F53 Southwind 32v
