If your bike has the common "switch to ground" system, you can replace the stock horns with Fiamms or the Ear Cannon (neat item....hmmmm) and use the stock connections from one horn to activate the relay. On my install the relay had 4 connectors....two for the relay coil and two for the contacts. #'s 85/86 are the coil on mine, #'s 87/30 are the contacts.
I connected the coil in place of the horn(s) (wrapped up the other set to prevent shorts), powered up the bike and tested to see if I got a "click," which I did. Then, I mounted the new horns which are internally grounded on one side (i.e., if you secure to a frame member one side will be at ground (negative) potential) and wired up a connector directly from the battery to the relay on one side of the relay contact, and ran a pair of wires from the other contact to the two Fiamm horns. Also, at the battery, I used a 15A fuse inline with the power lead...IMPORTANT TO DO THIS!! Then, I tested the horns....BIG improvement. Sounds like a truck now and alerts the cagers that someone is beside them
I use "heatshrink" on all connections....a good grade of black tape is sufficient (use 3M tape...not "Harbour Freight" tape...) and clean up all the connections with zip ties, etc. to prevent damage to the harness, etc. I have a set of airhorns (Stebals) which I purchased at a local autoshop for the XYL's Miata .....thinking about using those in the future. Had a set on my CB650 Custom and they worked quite well in appropriate situations. PM or email me (my screen name at aol is good) if you need any help.
Derswede
