horn dosen't work

you need to do some basic detective work. determine which fuse supplies power to the horn and make certain that fuse is good. next, unplug the horn from the wiring harness and check for volatge and ground while trying to honk the horn. if there is voltage, you have a defective horn. if there is no voltage, you need to start digging. possibilities: horn relay, wiring harness or horn ring, which is inside the steering column under the airbag.

Take you car to a reputable dealer and have them check the horn button, horn relay, wiring, and the horn itself for problems.