fuse
Don't know what king of fuse you're talking about but if it's a glass fuse, you can get a small plastic tool for removing it from an auto parts store. I would just pry it out with a small screwdriver (if the glass gets broken just save the end with the amperage stamped on it, no big deal). If it's the plastic blade type (ATO or ACP) just grab the body with a pair of pliers and pull. Either of these are held in place by spring pressure. If it's a circuit breaker, you must determine how it's held in place, ei; screws, clips, etc. My Catalina uses circuit breakers with a holding nut around the shaft of the breaker.