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The horn randomly honks for no reason... I need this to stop as I'm am alarming and in some cases infuriating other motorists

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Probably has a short inside the horn swith on the steering wheel.

Posted on Aug 26, 2010

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Horn randomly honks while key is not present


Some alarm systems use the horn to confirm engagement/disengagement. To randomly work I would suspect an adjustment in the sensitivity of the alarm system or a fault occurring in the system.

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fix unlatching and alarm gets happy?
find why the latch fails.
this will take close inspection of the latch. and its controls.

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Alarm horn will not turn off


do you have the alarm option, factory?
there are 2 horns
and 1 horn relay.
if the horn relay is energized, then the inputs to it are bad.
bad input is the horn relay has 12v across is coil pins, all the time.
so unplug the horn wires. silence.
then check relay , now that its quiet. is the coil hot?
hot means 12vdc across it. not thermal hot.
the relay on the 97 can be active for 2 reasons.
1: horn button stuck on, so pull that wire.Gray-org, at column
2: BCM is active same color, C2 in 13 is 0volts. (active)
if the BCM is honking the horn, we ask why, and that be alarm.
im reading at alldata.com so can you , under antithieft alarm sections.
if the alarm is activated, (is it) and any door switch is open, the horn honks.
if the gray-org. wires is at 12vdc , then the relay is bad
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ill stop, and wait until you find which it is, bad relay, bad horn button
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Dec 04, 2013 | 1997 Jeep Grand Cherokee

1 Answer

Horn keeps honking


Either the horn itself is grounding on something or the hornpad on the steering wheel is making contact when it shouldn't be. Or maybe an aftermarket alarm is causing the problem.

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1997 Lincoln Continentalhorn won't stop honking


First, Have your Battery tested. The Alarm systems in Ford made Products are very sensitive to Voltage. There are 3 systems in the car which interrupt power, the Alarm system (horn honking) and the Battery saver and finally the starter interlock system.

The Alarm system will do several things to disable the car from starting. It will reduce the voltage to the starter to prevent the engine from turning over. Some will even kill the ignition system so that if the starter is jumped, the car still won't start.

The Battery saver will disconnect any system to prevent discharge below a minimum threshold. Unfortunately, when the Alternator is working extra hard to charge a really bad battery: it will disconnect the charging circuit because it reads the Draw going to the Alternator to produce the power as a parasitic drain. Even at 70mph I have seen the charging disconnected and the vehicle coast to a stop when the electric runs out.

The last system worth mentioning is the Starter interlock. Under the dash and at the top of the Brake pedal lever is a switch. When you press the brake pedal, the switch allows the starter to crank provided the shifter is not in D or R. Drivers feet routinely hit this switch and either move it or break it. When it breaks it can short and drain the battery.

As you mentioned a Random problem, the Brake switch can shake to create a random problem if it is loose or broken. Your rear brake lights can be affected.

With the horn honking, at least part of your problem is the Alarm system. You can have a bad ignition switch too, which reads the keychip to disable the alarm. Your keychip may be bad and setting off the Alarm.

I had a new Lincoln myself which set off the Alarm randomly. I actually slept inside the car one night so I could turn off the alarm in the Apartment complex parking lot. Did'nt know if it would start again if the battery was disconnected and then reconnected. The Battery was shorted with less than 1000 miles on the car. It was a factory defective battery less than 3 months old.

But your car has many years and miles on it so it was worth mentioning the wear items. I hope my solution is helpful.

Sep 07, 2012 | 1997 Lincoln Continental

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Can I stop my horn from sounding when I lock my 2009 Accord


You might can have the dealer program it not to honk, but its just the way the keyless entry works. I've owned 2 accords--an 06 and 08--and both of them honk the horn when the lock button is pressed twice. Pressing the button once will secure the car and arm the alarm. So once click is all you really need. And no your alarm is not malfunctioning.

Jul 18, 2009 | 2006 Honda Accord

1 Answer

Car alarm goes off for no reason


I had this same problem just today.Hhowever, I had the remote in my hand and it would not stop the honking!. Since I could get into the car, I released the hood, opened the master fuse box on the left side, and pulled the fuse labeled "Horn Relay".(On the upper left, there are three large, black, square fuses, it is the third and is labeled in the lid). I waited ten seconds and put the fuse back in, no more alarm, no more infernal honking.

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1 Answer

2003 cavalier 'stock' alarm going off randomly.


disconect the whole alarm factory 1s a bad

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