your stock horns don't work??? Check to make sure they are getting power. Also, this sounds stupid, but, has worked for me before.Spray the insides with WD40. Let them set for a few minutes. Shark the excess WD40 out.Now see if they work. There is also a small screw with a locknut on the side of the horn. Loosen the locknut and,with someone holding down the horn button, turn the screw in one direction, then the other. They might start working.....Or not.....at least you tried...