Upgrading Horn System

Step 4 of 4
"You pressed the new horn and everything went dead. What happened?"

Louder Horns Need More Power

Louder horns require more current. Bypass the stock switch by using a relay. Always fuse this circuit to protect your wiring.

Aftermarket horns can draw 15-20 amps, while stock horn switches are typically rated for only 5-10 amps. Without a relay, you risk melting wires or damaging your bike's electrical system.

Horn Upgrade Wiring

🎙️ Listen to Explanation

In this lesson, you'll learn:

  • How to safely upgrade your motorcycle's horn
  • Why relays are essential for high-current horn systems
  • How to select the right wire gauge and fuse rating
  • Common mistakes when installing aftermarket horns

🧩 Horn Circuit Simulation

Toggle the relay and horn button to see how they affect the horn circuit.

Battery
Fuse
Switch
Relay
Horn
Relay:USED
Horn Button:RELEASED
Circuit Status:INACTIVE

Press the horn button to test the circuit.

Aftermarket horns can draw 15-20 amps, while stock horn switches are typically rated for only 5-10 amps. A relay allows the small switch to control a much larger current safely.

❓ Quiz

What is the purpose of a relay in a horn upgrade?