How to hook up an air horn to a 200 Ford Explorer?

I bought a nice air horn and would like to hook it up to my 2000 Ford Explorer, the air horn is 12 volts. On my fuses though, they say 32 volts, does anyone know how to hook this up? I want to keep my factory horn, and have a push button in the dash, please help, thanks.How to hook up an air horn to a 200 Ford Explorer?Run a wire stright from the battery, have a fuse on the wire and then have it going to a switch(autozone, advanced auto parts, or summit racing). Then have your "out" power going to the air horn. Dont forget to ground all the wires.