How to Replace a Motorcycle Horn With a Car Horn

Written by kyle mcbride
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Motorcycle horns are rather low in volume and high in pitch, compared to car horns. The result is a horn that is difficult to be heard over radio and road noise. Bike owners frequently opt to install a larger horn such as a car horn or even an air horn. The louder volume and deeper tone tends to get drivers' attention because not only are they likely to hear the horn, but they will perceive it to be a threat. This combination of factors is usually enough to penetrate distractions and gain surrounding drivers' attention.

Skill level:

Things you need

  • Mechanic's wrench set
  • U bolt
  • Wire cutter/strippers
  • Terminal kit
  • Terminal crimper
  • Car horn
  • Silicon filled butt-splices
  • 12-gauge wire (optional)

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  1. 1

    Remove the motorcycle horn with wrenches. Determine the mounting location for the car horn.

  2. 2

    Mount the horn onto a frame tube with the U bolt. Tighten the U bolt firmly with a wrench.

  3. 3

    Determine if the original horn wires will reach the car horn. Extend the wires if necessary by cutting a length of wire long enough to make the connection for both power leads. Cut 1/4 inch of insulation off of each end. Splice the wires together with a silicon-filled butt-splice and a terminal crimper.

  4. 4

    Select the proper terminal type for the car horn. Crimp the appropriate terminal onto the horn end of the wires with the terminal tool. Plug the terminals into their tabs on the car horn.

Tips and warnings

  • Check the power draw of the motorcycle horn and the car horn you replaced it with. A relay may be needed if the power draw of the car horn is too much for the original power leads to carry.

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