by your right knee is a fusebox/mfu.it is 3 layers deep one on top of the other with relays in there.HOWEVER I think this sounds more like a wiring issue/faulty door light switch issue.looms between doors and car body have a tendency to break and short out.pull the rubbers back and check them.the rubber gaiter also needs checking on the tailgate for broken wiring
Join the owners club for more help
www,fgoc,co,uk
Steve
November 2011