Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

So...horn went off on it's own...then fried. Big puff of smoke

Old 07-29-2015, 08:40 PM
  #1  
Supreme Member

Thread Starter
iTrader: (4)
 
Ozz1967's Avatar
 
Join Date: Dec 2005
Location: St. Cloud, MN
Posts: 4,780
Received 9 Likes on 8 Posts
Car: 1984 Trans Am
Engine: LS1383 in work
Transmission: Magnum F
Axle/Gears: Zexel Torsen 3.73, 28-spline mosers
So...horn went off on it's own...then fried. Big puff of smoke

Had anyone else had this issue?

My horn just started going off. I came out side and could smell the electronics cooking. By the time I grabbed my 8mm to disconnect the battery, the horn had changed tones and then warbled...and then "poof"...puff of smoke appeared on the drives side and the horn turned off.

Everything else seems to be ok but has anyone even ever heard of this happening?
Old 07-30-2015, 01:07 PM
  #2  
Supreme Member

iTrader: (1)
 
OrangeBird's Avatar
 
Join Date: Feb 2012
Posts: 3,670
Received 657 Likes on 467 Posts
Car: 1989 Firebird
Re: So...horn went off on it's own...then fried. Big puff of smoke

Originally Posted by Ozz1967
Had anyone else had this issue?

My horn just started going off. I came out side and could smell the electronics cooking. By the time I grabbed my 8mm to disconnect the battery, the horn had changed tones and then warbled...and then "poof"...puff of smoke appeared on the drives side and the horn turned off.

Everything else seems to be ok but has anyone even ever heard of this happening?

Yes , I have , and one of maybe 3 things caused it ;

Sometimes , the relay will short and provide power all the time to the horn . The horn has a "duty cycle" , in that it can't be energized continuously or it will burn out . Usually the relay shorts during horn use , so if you weren't using it at the time , it very well could be reason two ;

In very hot weather , the switch(es) in the steering wheel can become so hot that they get all rubbery and distort a bit , just enough to make contact and sound the horn continuously , or , lastly ;

If any kinds of aftermarket alarm system is in use , and tied into the horn , both the alarm unit and it's wiring should be examined for proper operation .

I'll bet one of the three reasons above are why your horn did that . Now all you gotta do is figure out which of the three it was , and fix it before you replace the burned out horn .

Good Luck with it ....
Old 07-30-2015, 09:43 PM
  #3  
Supreme Member

Thread Starter
iTrader: (4)
 
Ozz1967's Avatar
 
Join Date: Dec 2005
Location: St. Cloud, MN
Posts: 4,780
Received 9 Likes on 8 Posts
Car: 1984 Trans Am
Engine: LS1383 in work
Transmission: Magnum F
Axle/Gears: Zexel Torsen 3.73, 28-spline mosers
Re: So...horn went off on it's own...then fried. Big puff of smoke

Originally Posted by OrangeBird
Yes , I have , and one of maybe 3 things caused it ;

Sometimes , the relay will short and provide power all the time to the horn . The horn has a "duty cycle" , in that it can't be energized continuously or it will burn out . Usually the relay shorts during horn use , so if you weren't using it at the time , it very well could be reason two ;

In very hot weather , the switch(es) in the steering wheel can become so hot that they get all rubbery and distort a bit , just enough to make contact and sound the horn continuously , or , lastly ;

If any kinds of aftermarket alarm system is in use , and tied into the horn , both the alarm unit and it's wiring should be examined for proper operation .

I'll bet one of the three reasons above are why your horn did that . Now all you gotta do is figure out which of the three it was , and fix it before you replace the burned out horn .

Good Luck with it ....
I had an after market alarm, one of those old Viper units that would yell at you "This car is protected by Viper, stand back!" But I removed it years ago. It was hot, so the second part is plausible and being 30 years old, so is the first! lol...

Anyway, thank you very much for the input and ideas to look into!
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
FormulasOnly
TPI
95
07-23-2018 08:47 AM
BrianChevy
Wheels and Tires
5
10-13-2015 12:33 PM
LT1Formula
Engine/Drivetrain/Suspension Parts for Sale
7
10-08-2015 08:34 PM
3.8TransAM
NW Indiana and South Chicago Suburb
2
10-01-2015 07:47 PM
Badass355ciz28
Power Adders
4
09-28-2015 08:31 PM


Thread Tools
Search this Thread
Quick Reply: So...horn went off on it's own...then fried. Big puff of smoke



All times are GMT -5. The time now is 04:19 PM.