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Old 05-14-2013, 11:27 AM   #1
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Horn Randomly Honking?!

I have a 2002 GT. I will lock the doors with my remote. About 3-4 hours later I heard the horn honk 4-5 times REALLY fast. Like, I will be sitting in the couch in my house and all of a sudden my horn honks like 4-5 times really fast. Anybody know why? Thanks!
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Old 05-14-2013, 11:33 AM   #2
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I have a 2002 GT. I will lock the doors with my remote. About 3-4 hours later I heard the horn honk 4-5 times REALLY fast. Like, I will be sitting in the couch in my house and all of a sudden my horn honks like 4-5 times really fast. Anybody know why? Thanks!
Did you accidentally hit the panic button?
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Old 05-14-2013, 11:36 AM   #3
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Nope. My keys are laying on the kitchen table. It does it randomly. I googled it and managed to find somebody who had the same problem, but I wanted to see what anybody on here thought it might be. Here is what I found:

http://www.fixya.com/cars/t16957892-...secutive#bmb=1
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Old 05-14-2013, 11:41 AM   #4
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Originally Posted by BrandonMcCoy View Post
I have a 2002 GT. I will lock the doors with my remote. About 3-4 hours later I heard the horn honk 4-5 times REALLY fast. Like, I will be sitting in the couch in my house and all of a sudden my horn honks like 4-5 times really fast. Anybody know why? Thanks!
Maybe it's your car telling you to come drive me lol jk man.
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Old 05-14-2013, 11:43 AM   #5
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Originally Posted by Ckennedy121 View Post

Did you accidentally hit the panic button?
Nope. My keys are laying on the kitchen table. It does it randomly. I googled it and managed to find somebody who had the same problem, but I wanted to see what anybody on here thought it might be. Here is what I found:

http://www.fixya.com/cars/t16957892-...secutive#bmb=1

---------- Post added at 11:43 AM ---------- Previous post was at 11:42 AM ----------

Hahahahaha lol! Could be lol.
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Old 11-13-2013, 09:55 AM   #6
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We have figured out that we thought it was the battery. The dealership where we bought my car used (in February 2013) the wrong voltage, off-brand battery. We replaced the battery with the correct voltage battery and we thought that would fix it. It turns out it's still doing it. We don't know why…
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Old 11-13-2013, 10:23 AM   #7
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We have figured out that we thought it was the battery. The dealership where we bought my car used (in February 2013) the wrong voltage, off-brand battery. We replaced the battery with the correct voltage battery and we thought that would fix it. It turns out it's still doing it. We don't know why…
Maybe your car is a transformer
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Old 11-14-2013, 10:04 AM   #8
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It's possessed.
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Old 11-14-2013, 10:09 AM   #9
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Mine did this before as well. It was because my keyless entry got wet. I dried it out and put it back together. No problems since then which was probably 8 months ago
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Old 12-07-2013, 07:13 PM   #10
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Does anybody else possibly know why it's doing this? Ever since I have changed the battery to the correct voltage, it has quit doing it as much, but still does it.
Anyone else have this experience?
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Old 12-08-2013, 02:33 AM   #11
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No idea
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Old 12-08-2013, 03:31 AM   #12
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Does it have an after market alarm?
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Old 12-08-2013, 04:04 AM   #13
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Does it have an after market alarm?
I doubt it. I bought it used in February of 2013 with 153,000 miles on it. The car was all stock except for the cold air intake on the motor. So unless someone that had it before me put one on it, I don't think it does tho.
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Old 12-08-2013, 04:27 AM   #14
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Could try and get another horn from junkyard for cheap and see if that fixes it. Could be bad connection in horn. My dads old Volvo would honk if you stopped to hard. The contacts in the horn were so close they would touch.
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Old 12-08-2013, 04:30 AM   #15
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Could try and get another horn from junkyard for cheap and see if that fixes it. Could be bad connection in horn. My dads old Volvo would honk if you stopped to hard. The contacts in the horn were so close they would touch.
Well, see mine does this random honking thing when it's turned off and the car is locked. It honks 5 times super fast at random. Usually about an hour to two hours after it's been sitting and turned off for awhile.
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Old 12-08-2013, 05:16 AM   #16
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Sounds like a problem with the PATS system
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Old 12-08-2013, 06:33 AM   #17
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Sounds like a problem with the PATS system
What's that?
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Old 12-08-2013, 08:36 AM   #18
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It is the anti theft system.
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Old 12-08-2013, 09:48 AM   #19
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It is the anti theft system.
Possibly. It only does it when the alarm is activated. (When the blue light is flashing under the dash)
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Old 12-08-2013, 10:39 AM   #20
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Sounds like there is an aftermarket alarm installed. Maybe change the batteries in the alarm key fob
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Old 12-08-2013, 11:23 AM   #21
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Sounds like there is an aftermarket alarm installed. Maybe change the batteries in the alarm key fob
I have. I did a couple of months ago… lol
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Old 12-08-2013, 03:01 PM   #22
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Possibly. It only does it when the alarm is activated. (When the blue light is flashing under the dash)
definitely sounds like an aftermarket alarm. Maybe run to a local stereo shop and talk to one of the techs. Maybe they can lend you some advice and check it out for you
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Old 12-08-2013, 03:23 PM   #23
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definitely sounds like an aftermarket alarm. Maybe run to a local stereo shop and talk to one of the techs. Maybe they can lend you some advice and check it out for you
Okay. Sounds like a plan! Thanks!
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Old 04-02-2014, 11:14 PM   #24
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Well, most of you were correct!!! I purchased a new (NOT rebuilt) 135 amp alternator to replace my factory stock alternator (which had 165,000 miles on it, not including idle time). After I got it replaced, the humming in my interior speakers stopped and the humming stopped under the hood!!!! I replaced it just in time because the bearings in the back of the factory alternator had already started popping/bulging out and popped off the dust cap on the back of it!!!

Thank you everyone for all the suggestions on what the noise could possibly be!
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Old 04-02-2014, 11:17 PM   #25
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known issue... if a cute girl walks by the horn will honk... your mustang just wants some back seat time that's all
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