The older horns will pull more amps than the newer ones. Just make sure your harness can handle it during "Road Rage" or when you are driving behind my very close relative (Wife). LOL
My 55 horn has aprox #14 wire on it, haven't looked at the newer vehicles for that.
If you have a smaller wire feeding your horn and you use it a lot , you may need a bigger feed wire to keep it from melting.
But for the short "toot toot" i would use it for, probably wouldn't bother it.
Just my opinion, not necessarily fact, I've never done it. Though it does sound like a good idea.

Last edited by LeeP; 07/18/2018 1:46 PM.

1961 ford f500
1953 3100 five window (https://www.facebook.com/1953-Chevrolet-5-window-1533405913413610/)
1955-2 3200 big window (https://www.facebook.com/Leep3200/)
55yrs as a mechanic and retired. (kind of)