HMT-Admin

Actually its just 1 wire, take the 12v signal wire from your alarm siren and T tap it (splice) into the postive wire of your horn and walah...

45psi

fire detector alarms in the head rest.

fork

yeah, It will be one wire, I thought horns got contant hot and switched negative, I could be wrong though. But yeah hook up the horn, get an extra siren, and put a piezo siren inside the car. It is so loud inside the car, it is honestly painful.