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Thanks for this thread. Her 996 started randomly beeping at me for no apparent reason on my commute home the other day. Found this thread via Rennlist, ordered a new bracket, and installed it today. Hopefully the beeping will be fixed now.

Thanks to those that figured it out so long ago and posted about it.

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My bushings were intact but weak enough to cause the unintended horn blow.  I ended up using some fuel injector o-rings.  They fit sungly around the isolated center bushing and seem to add just enough firmness.   I only added them to the side that has the contact points.  Seems to work well.  I had some leftover from a recent FI replacement on our minivan, but you can buy a kit of 12 for under $8 local - it's a Standard Brand part.  Or from here: http://www.rockauto.com/catalog/moreinfo.php?pk=47178&cc=1432097.

 

Oh my...I just admitted to using minivan parts on a Porsche :eek:

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This forum is terrific!

 

I picked up a '98 a couple of months ago, and the horn did not work. I could hear the relay when I pushed the horn button - fuse was good.

 

I replaced the horns and (as you might suspect) the horn went off the first time I hit the brakes!

 

Good thing I had picked up the #31 o-rings at home depot already (after reading this thread)

 

I disconnected the battery but never bothered to disconnect the air-bag - had the required access to insert the o-rings.

 

Horn works perfect now.

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I had some extra time over the weekend so I took some pictures of the fix for the horn covered in the earlier post. The o-rings measured .300 x .580 and .140 thick. The nylon washer measured .375 x .875 and .031 thick. The image below shows the hole after the center is remove, the components partially disassembled, the components together, and the components assembled to the frame.

I know this is a old thread but wanted to update with my experience.  I didn't have to go through all the work here.  The bushings on my 97 while deteriated, wern't completely gone.  All I did was get #31 o-rings and put them over the center sleeve on *each*  side of the bushing. I did not fix them in place with silicon...didn't see the need as they are fairly snug on the sleeve and when assembled, are sandwiched between the large head screw, the horn frame, and the contact block in the steering wheel.  One could seat them in silicon but I do not see the need to spend extra time while the silicon dries.

 

A fourty minute job and back together and good as new.  One can get the #31 o-rings at Home Depot or Lowes, mfg by Danco, ten in a pack for $2.50.

 

Hope this helps someone with their repair.

J

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I have a 2000 996 Cabriolet and was experiencing horn honking during braking or hard turns.  Read the forum and followed the suggestions.  Problem solved. I found o rings in the plumbing section of Home Depot.  Used #231 O Rings 9/16" O.D. X 5/16" I.D. X 1/8" thick.  Thanks for all the help and suggestions.

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I have a 99 996 with the 4 spoke wheel. I was having the issue of the horn going off under braking, and then not working at all. I just replaced the airbag frame and still no horn. I checked the B3 fuse and noticed it was blown. Tried replacing with new fuses and they blow immediately.

 

Is this the relay that is bad? Is it the horns themselves?

Edited by aeichmiller

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3 hours ago, aeichmiller said:

I have a 99 996 with the 4 spoke wheel. I was having the issue of the horn going off under braking, and then not working at all. I just replaced the airbag frame and still no horn. I checked the B3 fuse and noticed it was blown. Tried replacing with new fuses and they blow immediately.

 

Is this the relay that is bad? Is it the horns themselves?

 

Likely one of the horns. They are perhaps the cheapest horns Porsche could have used.

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On 3/21/2018 at 5:59 PM, aeichmiller said:

I have a 99 996 with the 4 spoke wheel. I was having the issue of the horn going off under braking, and then not working at all. I just replaced the airbag frame and still no horn. I checked the B3 fuse and noticed it was blown. Tried replacing with new fuses and they blow immediately.

 

Is this the relay that is bad? Is it the horns themselves?

 

 

Following up. i replaced both the high and low horns and that solved the problem of the fuses blowing continually. Unfortunately when I put a new fuse in the horn now goes off constantly.

 

I out in a new airbag retaining frame from Pelican so the bushings should be good. Is it possible I overtightened it? Could the ground on the horn switch be bad?

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The connector for ground wire seems a little loose. Is there a source for those flag connectors? The local autoparts stores have them but with a super hard case surrounding them that will be impossible to crimp around the wire.

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I used #31 O-Rings and I found them in the plumbing department at Home Depot.  It worked great.  I hope this helps

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