To take the load off the horn wiring going up the steering column, it's a good idea to install a relay to carry the current to the horn. If you want to install a 1 ohm 200 watt resistor inline with the relay, it will moderate the volume a little.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!