[header] How to fix a broken car horn [title] Check the fuse box if your horn will not make any sound. [step] Read your owner's manual to find the location of your car's fuse box. Your owner's manual will also inform you of the specific fuse connected to the operation of the car horn. 
[title] Remove the fuse with a pair of tweezers, needle-nosed pliers, or a pair of regular pliers. [step] You may also be able to remove the fuse with your fingers.