A common failure on a 1987, 1988, 1989 Mustang is the contacts on a factory horn pad wear thin causing horn failure. Over time the foam insulation between the copper contacts under the horn pad becomes brittle and tears or disentigrates. This allows the copper contacts to touch, sometimes, even when the horn button is not being pressed. Does your horn honk at times when you are not even in the car, or not honk at all? If so, this handy Mustang horn pad replacement is what you need. This kit (LRS-13805ARP) includes a new Mustang foam horn contact pad, a scotch-brite pad and some instructions, however we made a short video that describes the whole process.' Check out the video blog!