Ford Super Duty (1999-2016) :: Horn Just Starts Blowing By Itself
Apr 15, 2014
I have 2002 F250SD, The horn just starts blowing by itself. Bump the horn switch and it stops for a couple of weeks. I've looked at the wires to the fuse box and no wires shorting out the horn wire. I read some very old posts but nothing conclusive was ever decided on, just a lot of guessing. The horn switch has always been sensitive.
Somebody said the air bag is warming up in the sun and expanding causing the horn to blow. Somebody said the horn relay, but in 55 years of working on trucks, I have never had a horn relay act like that. I'm told the horn relay is built in the back of the fuse box and it all has to be replaced. Some say the clock switch. I don't know what that is or where it is. I guess inside the steering wheel. Is it hard to replace?
Where do I go from here....
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Sitting in the house, heard a horn blowing and ran outside to find my F350's horn was blowing. When I pushed on the horn button on the steering wheel it quit. Couple of hours later, it started blowing again. Pushed the horn button to make it stop and removed the fuse so it would not start blowing again. Did a forum search, but didn't have any luck. Short in steering wheel?
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The other day I was checking out my parking aids (they kept saying something was behind me when there was nothing there) and the horn just started blowing by itself, constant on until I disconnected the batteries. Been a few days and just got back to working on it, checked the horn switch in the airbag and it is functioning fine. Hooked the batteries back up, no horn, but after a couple of minutes I start getting little honks out of it, then locked on again. Where I should go from here? Truck was parked, switch off, engine off today when I hooked the batteries up. Never started it or turned the key on.
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In my new to me 99 F250 SD ,Started today off with switch sticking in drivers door causing dome light to be on when doors closed... oiled the crap out of the door mechanism and it started working. Later in the night I look out side notice the radio lights on with no key. Can't figure it out so pulled the face off and figure I'll look at it tomorrow and go to bed.
1:30 am the horns blaring! I open drivers door and horn stops, close it and it goes off I ended up pulling the batt cable so I could go back in the house. I did search for info with no sure real causes. Seems like it has happened to others as well.. BTW it did start raining before the radio stayed on. Thinking water in the dash or fuse panel. But it doesn't explain door switch problems I had earlier. Maybe 2 separate problems. This will be fun! Not!
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Okay so I have an e99 f250 7.3 the problem all started went I hit a puddle the other day. My horn started going crazy and wouldn't shut off so I had to pull the fuse and relay. After that I found another problem, all my dash lights,headlights and running lights will not turn off unless I pull the battery terminals, it does not matter which way the headlight switch is it can be on or off and they stay on. I did find it though if I pull the negative terminals and put them back on the lights stay off if I turn the switch on and try to turn the lights back off with the switch they stay stuck on again untill I pull the terminals what could be the problem I've looked at every fuse and can't find the probelm.
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My brothers truck has unusual problem of when parked the horn randomly comes on and stays on? Why?
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Been searching but can't find a clue. I replaced my steering gear box. Went fine, but after starting back up. My alarm goes off, my cruise or horn doesn't work and my air bag is giving a code 32.
Is there a ground wire or something I could of missed when installing the gear box?
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I have a 2001 F250 V10, 150,000 miles, gas, very basic truck (no power windows, no cruise, no security system, no power locks, etc). In it's previous life, it was an IDOT highway truck I purchased at auction in 2005. Used primarily to pull horse trailer, less than 2000 miles per year. Stored under cover when not in use. Windshield leaks very little, but generally not used when raining.
Last week, 9pm, horn starts blaring solid tone. I go out and unlock door, open door, it stops. I start truck, still fine, turn truck off. Lock door, close door, starts blaring again. I reopen door, leave unlocked, close door, then get intermittent beeps. I reopen door, disconnect battery because it's late, I was going out of town, and felt bad for my neighbors. Just got back in town, too afraid to reconnect battery and not be home in case it starts going off again. I had last used the truck about 36 hours before the horn started going off, weather about 70 degrees overnight.
I've read other threads, but can't find one that fits (I have no cruise, kept out of rain, not freezing cold, not diesel).
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F250 today at 61300 miles going down the interstate today my vehicle made a strange new noise that sounds like an old timey car horn. The sound started at about 75mph and comes and goes depending on what appears to be air turbulance and other vehicles nearby or goes away as the speed comes back down to lower numbers. Also when the sound is present you can "feel" it in the side handle on the A post. Really weird. Doors were closed all around.
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I have a 2001 F-250 SD XLT with the ABS light on, cruise control doesnt work and the horn only works with the key out. The codes for the ABS is no signal input from the left and right front wheel sensors. No problem there. Also my speedo stops or jumps when I press the horn button while driving down the road. When I quit pressing the horn button the speedo works fine. So after looking over the posts on cruise control, etc. Does the rear speed sensor have anything to do with the cruise, horn not working? All fuses are good so I am thinking the cruise control switch on the master cylinder or a short in the steering wheel column or my ignition switch. What do you all think?
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I am trying to figure out where the relay would be when i look online for the map of the relay box under the hood it says nothing of a horn relay. I don't have a key fob for the doors to unlock so I wouldn't think its tied to the computer. Should mention nothing happens when you hit the horn also fuse is fine. No power at the actual horn when i hit the steering wheel(horn)....
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My custom air horn setup. I have a schematic here and and need info whether my drawing is right or not. I also need some help on what gauge wiring, what amp fuse and what relays.
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Attempting to debug the Horn not working on my 2003 Ford F450, The fuse is good (shown as #37 15 amps) so next I would like to check the Horn relay.
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So i was replacing my power steering box after the shaft broke on it and apparently i didn't have my steering wheel back to exact center. after putting everything back together and started to drive down the road a very thin flat wiring harness broke and got tangled around my steering column under the plastics of the column. I then lost my horn and my cruise control and i believe my airbag. I pulled the wiring harness out and it was very long with two white plugs on either end. I'm not sure what this part is called or where i would be able to buy another one. And if there's some kind of instructions on how or where this harness plugs into sense it was ripped out.
2000 ford f-350 lariat 7.3l diesel....
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Horn isn't working found fuse blown. Replaced fuse and horn stays on. Swapped relays still stays on. With fuse out pressing left side of horn cover on steering wheel I can feel/hear relay click. Pressing right side not so much. What and where to check? Is there a way to disconnect the horn buttons on the steering wheel?
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I have a 2005 f350 lariat 6.0. My horn, cruise volume, heat and fan controls on the wheel are not working. The airbag light isn't on. I am thinking that it's the clock spring. The stereo controls were intermittent for a while so I think it's the clock spring. I just want to be sure. Anything I could check?
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I have a 2002 f350 my horn went off in the middle of the night got up and unplugged the horn what is my problem. also, the cruise control won't work when it all happened
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I was driving my truck and my power windows quite working I figured it was a fuse so I wasn't to excited about it I stopped and unloaded some scrap metal and then when I started my truck back up I couldn't shift it out of park unless I unplugged the brake pedal sensor or turned the key just out of the off position then shifted to neutral then started then I could put it in gear and go so I got home and started looking checked all my fuses all good then I realize the windshield wipers are not working either and the door beeper, if you have your keys in the ignition also isn't working the horn, isn't working the lights on the window and lock switches isn't working either so I'm kinda lost now gonna barrow a relay tester in the am but I'm kinda thinking maybe the computer ?? For all this to happen at one to,e doesn't make any sense to me that's a lot to all go in one shot it makes more sense to me
No horn
No power windows
No accessory lights on the window and lock switches
No wipers
No buzzer/beeper (like when you open the door and leave the keys in the ignition
Won't shift out of park without doing it with the engine off or the brake pedal position sensor unplugged
I've gone thru with a test light and got power to the fuses for everything but still nothing
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I have a 2004 5.4 power f350 that makes a fog horn pitched howling sound at idle. First instinct was a pulley. Started it with belt off and its obviously something else because it still made noise. Traced it down to a resonating sound from the intake. Specifically the hose from the IAC to the air cleaner.
From some googling, i decided to change the IAC. No real change. So I took off the resonator tube and thoroughly cleaned it, took off the throttle body and cleaned it, took off the top snout part of the intake and cleaned that put in a new air cleaner (the glue was separating on the old one) and reset the battery. Still makes noise at least 85 percent as loud as when i started. Am I missing something?
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I have a 2001 f250 5.4 triton. My cb antenna hole leaked water in cab, soaked my fuse block. Horn goes on and off, radio turns on without key in ignition, truck only starts when key is on and I bridge solenoid, and number 4 coil is not firing. I have let truck dry out, fixed the leak. Everything is bad to normal except starting issue and coil issue.
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I'm having trouble with my '99 F-350 7.3L 4X4. One day, my power windows, cruise, dome light, horn, wipers, and 4 wheel drive stopped working. After checking all of the fuses, I have found no bad ones.
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