Horn just started blowing!
Thread Starter
Intermediate
Joined: Aug 2018
Posts: 49
Likes: 4
From: Smithtown, NY
C5 horn blows by itself
Imagine it’s 5am and suddenly your horn starts blowing. I removed the fuse to stop it but don’t know why it happened. Any help in identifying or indicating what might have caused this appreciated. Thanks folks.
Last edited by Rickny7@gmail.com; Aug 4, 2022 at 01:27 PM.
Le Mans Master
Joined: Dec 2017
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From: Virginia
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You may want to post this in the tech section. There are various known horn issues like the membrane or relay, but none of those would make the horn randomly just go off and not stop.
Melting Slicks
Joined: Nov 2014
Posts: 3,399
Likes: 1,339
From: Havre de Grace Maryland
Not sure if this is your issue, but while on a consulting assignment, when locking the doors of the rental vehicle, a new BMW's theft alarm would go off in the parking lot. The owner would come out, look around and stop the alarm. Over the next 5 days, I had a lot fun with that BMW's owner. He never saw me doing the entertainment. I know, I am bad.
Melting Slicks
Joined: Apr 2021
Posts: 2,191
Likes: 82
i dont know but my exhaust sets off a buddys 99 z28 alarm or flashing lights when i start the car in the evening next to it. There is less environment noise from traffic during the evening then there is the day. I had the same thing happen when i reconnect the battery the alarm sometimes randomly goes off honking.
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Melting Slicks
Joined: Dec 2018
Posts: 2,654
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From: Orange County, CA
If you take the airbag off the steering wheel (you can leave the airbag wire connected), which is held on by 2 Torx-head screws from the backside of the steering wheel, there will be 2 additional wires for the horn. With a multimeter you can check continuity across these wires with the horn membrane pressed and the horn membrane not pressed. If the multimeter shows a short regardless of the horn membrane position, then it will be as @MWWarlord & @feeder82 said.
Instructor
Joined: Aug 2018
Posts: 103
Likes: 41
From: Florida
Same thing happened to me. It was the horn membrane. It is part of the air bag module. GM does not sell just the needed membrane, they only sell the entire aIRBAG MODULE FOR ABOUT $900.00. i BOUGHT THE "Horn Button Contact Assembly" from Corvette Parts & Accessories, Mustang, Camaro, Challenger | RPIDesigns . It was $68.99+ tax when I got it in January of this year. Prices has gone up a little, but still cheaper than GM.
Melting Slicks
Joined: Dec 2004
Posts: 2,847
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From: Sleepy Hollow- NJ
Same thing happened to me. It was the horn membrane. It is part of the air bag module. GM does not sell just the needed membrane, they only sell the entire aIRBAG MODULE FOR ABOUT $900.00. i BOUGHT THE "Horn Button Contact Assembly" from Corvette Parts & Accessories, Mustang, Camaro, Challenger | RPIDesigns . It was $68.99+ tax when I got it in January of this year. Prices has gone up a little, but still cheaper than GM.
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Merged threads together. Good luck finding a solution for the horn issue.
Safety Car
Joined: Jan 2000
Posts: 3,904
Likes: 250
From: Orlando FL
Oh but it will. Mine went off at 4 in the morning. One long solid blast of the horn until I pulled the fuse. When the membrane in the wheel fails, it will let you know and the surrounding neighbors know.