Review on 🚂 Carfka Air Horn Kit: 150dB Super Loud Train Horns for Trucks, Boats, and Cars with 120 PSI Air Compressor - Black, Dual by Joel Miranda

I installed this on a 1994 Mazda b3000 because I didn't like the little beep. When I found the factory horn I only saw one 12v wire and the supercharger needs two. It took some experimentation and I ended up not using a relay. What I did was connect the original horn wire to the positive terminal on the supercharger, go to Home Depot and buy a wire to ground the other terminal to my car battery. It worked great and now when I honk the horn on the steering wheel, people get a big surprise! Definitely worth the money.