When your horn doesn't work, chuck it, right? Not so fast Chucky. Have a look at this article that we stole from the folks at Revzilla about why you might want to repair your old one. You might want to at least do a litlle troubleshooting since horns are ridiculously simple devices.
 https://www.revzilla.com/common-tread/how-motorcycle-horns-work-and-how-to-fix-them