OK, here's what I should have written. Use a relay in place of the stock
cute horn. Positive to positive, ground the relay with the brown wire, and
make yourself a Y with three connectors, to use for the dual macho horns.
Look for the single connector Fiamma horns, and you're done. The relay has
12v all the time, but only works when it is grounded thru the horn button.
So easy even I did it. You want a very loud set of horns from a wrecked
vehicle, get them from a 1995 FixOrRepairDaily car or truck, very loud,
don't know how they connect, though. Can't win them all, sorry.

Hector