nope, as its part of the main loom that would mean you would have loads of other problems, its prob just oxidized connections, mine went the other month turned out to be the connections and the horn,
make sure the bolt its mounted with is clean too as this is the earth for the horn, if thats cruded up then it wont work eather,
give the area a real good clean up with a wire brush, sand paper and if it still dont work get a new one