Notices
996 Forum 1999-2005
Sponsored by:

Horn electrical fault

Thread Tools
 
Search this Thread
 
Old 09-10-2013, 01:25 PM
  #1  
Fredster
4th Gear
Thread Starter
 
Fredster's Avatar
 
Join Date: Aug 2012
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
Default Horn electrical fault

My horn has started honking when I step on the brakes. Solutions?
Old 09-10-2013, 01:35 PM
  #2  
ditto
Racer
 
ditto's Avatar
 
Join Date: Aug 2013
Location: Mass
Posts: 424
Likes: 0
Received 2 Likes on 2 Posts
Default

Temporarily pull the fuse.

If you brake with a hard downshift does the horn honk? If so g's are the cause. Either the switch is gone or there is a short.

I apologize for laughing at your misfortune.
Old 09-10-2013, 03:26 PM
  #3  
DBJoe996
Rennlist Member
 
DBJoe996's Avatar
 
Join Date: Apr 2010
Location: Ormond Beach, FL
Posts: 5,811
Likes: 0
Received 1,091 Likes on 701 Posts
Default

Fairly common, but requires steering wheel air bag removal and replacement of plate behind steering wheel air bag. Search the forum for horn braking...many have experienced this before and did a write up on it.

Last edited by DBJoe996; 09-11-2013 at 09:47 AM. Reason: Correction - left out "air bag" in my post
Old 09-10-2013, 09:39 PM
  #4  
kdm
Advanced
 
kdm's Avatar
 
Join Date: Aug 2012
Location: Brunswick, GA
Posts: 61
Received 8 Likes on 6 Posts
Default

no need to remove the steering wheel but you do need to remove the air bag unit in the center of the wheel to gain access to the Air Bag Retaining Frame behind it. My horn was doing the same thing and I replaced the retaining frame which solved the problem. The rubber bushings get old/soft and flex too easily causing the horn contacts to touch over a bump or when slowing down. It's a couple of Torx screws behind the steering wheel to have the air bag unit lift out. It's a little more involved than that but I did it in about an hour. No problems since.
The part number is 993 347 088 01 - at least for my '99 C2
Old 09-11-2013, 09:14 AM
  #5  
sjg1138
Burning Brakes
 
sjg1138's Avatar
 
Join Date: Jun 2013
Location: USA
Posts: 971
Received 21 Likes on 15 Posts
Default

I just did this fix a few weeks ago. Putting in the new (aluminum) horn frame is pretty easy but you do need an extra long torx bit that is the exact size. The torx screws in the back of the steering wheel that need to come out are deep. If I recall I used a small ratchet to turn the torx bits. The screws can be in there fairly tight. The new horn frame set me back $80. There are those that have successfully rebuilt the bushings on the horn frame so that is an alternative to buying a new one.
Old 09-11-2013, 08:43 PM
  #6  
fpb111
Rennlist Member
 
fpb111's Avatar
 
Join Date: May 2008
Location: Northern NJ
Posts: 5,535
Received 93 Likes on 69 Posts
Default

Originally Posted by Fredster
My horn has started honking when I step on the brakes. Solutions?
We are assuming that you have a 4-spoke wheel. Would be very helpful to spec the year, and SW type
Old 09-12-2013, 09:21 PM
  #7  
Shark Attack
Rennlist Member
 
Shark Attack's Avatar
 
Join Date: Oct 2005
Location: Southern Utah
Posts: 11,012
Received 64 Likes on 34 Posts
Default

I took a 2 Pc of rubber hose and put it under the plate. It was meant to be a temp fix. But it's been working fine for 3 years now. So I have left it alone



Quick Reply: Horn electrical fault



All times are GMT -3. The time now is 03:55 AM.