Just bought this car and the previous owner told me the horn did not work. I figured I could handle this but cannot find where it is located. Have checked the ususal locations in the front of car but no luck. I did find the car was hit in the left front fender and may have been replaced. Is it located in the fender? I cannot even find a wire hanging anywhere that would indicate it might have been removed. Any help is appreciated.
If it's the same as my 2002 Focus, the horn is located on the driver's side of the car, attached to the radiator mount, behind the front fender.
It's smaller than you think (about the size and shape of a hamburger), but easy to replace as it is only held on by one bolt and connected via a wiring harness, or two wires (plus a ground).
Very simple to fix, and you will need to fix it often becuase these vehicles are poorly designed and feed water or slush up into the horn assembly; that's why they fail.
So when you install the new one, try to angle the mouth of the horn backwards and towards the center of the engine.
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there are 3 parts, the horn, the horn relay, and the horn switch. horn relay is simple to check by replacing it with another from a parts store. it is plugged into a fuse panel inside the car or under the hood, look at your owner's manual for exact location. the horn can be disconnected and then jumpered directly to the battery. an old extension cord with the ends of the wires bared makes a find jumper cable. horn is usually located next to and in front of the radiator. if the horn honks it is good, if not you can buy a generic one at a parts store. if it is not the horn nor the relay then you are looking at replacing the switch inside the steering wheel and this is generally beyond the scope of a non-mechanical person.
Apparently the previous circuit of horn is shorted making work all time.
Just check entire wires, relay and horn button in your car for shorted and have them fixed.
Otherwise you need to install new set of horn system ( horn button, wires and relay)
The horn relay IS NOT located in a box toward the front of the engine. It is located just behind the radiator overflow reservoir and attached to the inner fender next to two other relays. It is the only one without a plastic cover over the top of it. FYI, our Crown Vic horn didn't blow, and the cruise didn't work. I changed the relay and still no horn. I decided to check the horns themselves. Found wires disconnected from terminals. Touched wire to horn terminal and horn blew incessantly. (previous owner had disconnected horn rather than diagnose why) Pulled the horn "button" from steering wheel and disconnected the wire leads and horn quit. Disassembled the "button" assembly. Foam had degraded over time between the contacts. (Ford has discontinued this part). Cleaned and replaced foam with Scotch foam mounting squares with holes punched out over contacts (2 layers thick). Re-assembled and viola! Horn and cruise control both work! Relay was bad as was horn button.
Update to previous post, the horn is mounted under the front wing, I purchased another "generic" horn for £10 (rather than fords £50) and made up a cable to connect it. As the horn is so cheap I did not buy the "Kit" but angled the horn flat so least likely to take in water.