FARBINAir Horn Relay Wiring Harness Kit 12V 80 AMP for Car Truck Motorcycle (Relay 4 pin Single Horn Wiring Harness, 12V)

Works like a charm, easy to install. horn power and ground leads are very short, so the relay must be mounted within a few inches of the horn. For me that means above the radiator where it will be exposed to rain and dust. Time will tell how well it holds up, but for now it's certainly worth the $10 I paid for it.

Buen producto cumplió espectativas

the red and the yellow go to battery. the rest was easy.. blue wire is hot that send power to a horn relay. .. this went on a c3 cooler for wireless lights and horn...works great after i burnt up 6 rc controler boards to figure it all out works like a charm now..

It was easy to follow the instructions with graphic. High quality product.

This package has a fused, high-amperage battery wire enclosed in a protective sheath, which connects to a battery terminal and runs through (around) the engine to the front part of the bike, where you'll presumably mount the horns. The front end of the assembly has a relay, the two trigger wires for the relay (i.e., the wires that come from your horn switch), two positive wires that go to your two horns (assuming you're using a dual-tone horn setup), and two ground wires. Starting from this, here's how I modified it to work better.First, I replaced the relay itself with a waterproof relay that includes a built-in diode. This is important for horn circuits especially, because their intermittent use causes voltage spikes in the system - the diode serves as a kind of "cushion" against these spikes. The improved relay cost me about $3.50; well worth it.Second, I removed the two ground wires from the assembly. Because I was mounting my horns directly on the frame, the attaching bolts for the horns were themselves good grounds, so I just ran a short wire from one (of the two terminals of) each horn to its mounting bolt. Finally, I connected the "load" wires of the relay (the yellow wires) to the remaining single terminal of each horn.My approach eliminated some wires and used a better relay, all for a small increase in price. But these were small things; the bulk of the harness was used to good advantage. Next time I did this (when?) I might consider building out of individual components and saving a couple bucks, but this unit delivered what I was looking for at a reasonable price.