Horn Repair?

[6S1568]

One of my horns suddenly stopped working. I checked the circuit and there is power to the horns, only one of them won't sound. Anyone know a source for repair? Thanks

[roddster]

  Try this.  Jumper the positive battery lead to the horn contact on the horn itself.  Then thread in, or thread out, the "tuning" screw.  It has the strange head on it.  Tap the horn once and a while, while doing this.  Often enough they start to make that familiar racket.

[6S1568]

roddster you're a genius, that worked perfectly! Thanks so much for the tip. Denny