Hi Larry,
I am the guy that boiled my horn...
Here's what I have learned about horns;
Inside a horn there is a small electro magnet that when electricity is provided, it pulses and while it is pulsing it pulls a metallic strip that causes a vibration which in turns causes the horn to work.
Now that may not be entirely accurate but it is at least a general working description. Other forum members may elaborate if they wish...
My horn didn't show any sign of life if provided electricity from the bike's power or battery charger hooked to the horn leads. Once I boiled it, I was able to get it to "react" when I hooked it to a battery charger; it would spark, "jump" and make a "CLICK" but did not sound like a horn. Because my horn is mounted to the bike by a large set screw (10 mm? with a nut 12 mm? which was removed at this time) I then mounted the bracket to the horn as per design using the set screw and nut then held it in my hand. I didn't mount the bracket on the bike so I could adjust it. Hooking the horn up to the leads on the bike now gave me an opportunity to tune the horn. It helped to have someone work the horn button while I did this as my hands were busy holding/tuning the horn.
There is a flat blade screw driver slot in it for the porpose of tuning. The mounting set screw is used to tune to the horn to a point where I could get it to "sound" to a point but didn't work 100% but was close... say 90%. Then I used the very small tuning screw to finely tune the horn to perfection. The tuning screw would be about 4mm with a tiny lock nut. By turning this screw in or out, I was able to get the horn to work like it was brand new.
One word of caution... the use of ear plugs is recommended!!!
