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How to Fix a Car Horn

If your car horn stops working, you can troubleshoot and often repair the problem.


  • Step 1: Check for sound Check whether the horn makes any sound. If it does, the electrical circuitry is still working.
  • TIP: Most vehicles have two horns, which sound at the same time. They are usually mounted to the radiator core support or behind the vehicle's grill.
  • Step 2: Check horn Unbolt, clean any corrosion, and reinstall the horn if it does not sound. If the horn still does not work, run a jumper wire to it from the battery. If it still does not work, replace it.
  • Step 3: Check fuse Check the fuse that controls the two horns if there is no sound from either one. If the fuse is burned out, replace it. Try the horn again.
  • TIP: Check your car owner's manual for the location and type of fuse.
  • Step 4: Check horn button Check whether there is any debris obstructing the horn button on your steering wheel that may be preventing the horn from sounding.
  • Step 5: Check wiring Check -- or have a mechanic check -- the wiring attached to the horn, if all else fails. If it is damaged, repair or replace it. Now you can make some noise.
  • FACT: Before 1910, bulb horns were widely used on automobiles.

You Will Need

  • Battery
  • Fuse
  • Horn button
  • Wiring
  • Mechanic

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