How to install a button horn wiring add on kit

Written by jack hathcoat
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How to install a button horn wiring add on kit
Add-on horns are ideal applications for horn-button kits. (a boat horn image by Ana Stefanovic from

Older vehicles often encounter parts scarcity for some items, and on newer models it is often quicker and easier to bypass a problem with a workaround. For example, the owner of a 25 year-old farm truck is unlikely to find horn-pad parts very easily, nor at an affordable price. A new model owner may not have time for the steering column to be disassembled to repair the horn. Inexpensive horn-button kits solve these problems. They can be a temporary or permanent repair and are quick to install.

Skill level:

Things you need

  • Screwdriver set
  • Wire strippers
  • Wire crimps
  • Fuse tap

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  1. 1

    Use a screwdriver to mount the horn button under the dash. It's easy to locate an existing trim screw to remove and share the mounting with the horn button. This is especially true if the horn button is only a temporary repair.

  2. 2

    Cut two lengths of wire, one that will route from the fuse panel to the horn button, and the other from the horn button to the horn. Install a fuse tap on the existing horn fuse. Use a wire stripping tool to strip 1/4 inch of wire. Crimp connectors that will fit the fuse tap and horn button on one of the measured wires, and connectors that will fit the horn and horn button on the other.

  3. 3

    Route any wires that need to go through the firewall from underneath the dash. Locate a rubber grommet that is installed under the dashboard and push the wires through. Protect the wires from chafing. Use a small screwdriver and pry the rubber back to create an opening. Insert the wires, and if necessary, have an assistant locate the wires from under the bonnet and pull them through the opening.

  4. 4

    Plug in all the wires. Use a screwdriver to install the two horn button wires onto the button terminals. Unplug the existing horn wire and install the new horn wire. Be certain the wire is routed securely and does not touch any moving parts or a hot exhaust component. Plug the horn power wire into the fuse tap. Test the horn.

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