I've been using this board like crazy diagnosing and fixing things on my awesome new 928. I so love everyone here.

Now that I'm up your a$$e$...

Has anyone here installed a steering wheel and not had their horn work afterwards? I may just need to go back in and check things, but I'm pretty sure I wired it up correctly. It wasn't hard to do.

I just love the 928 horn, and even though I hardly use it, I'd hate to not have it.

Thanks for everything you all don't know you've helped me with...

Dave

 

Is it possible you blew the fuse at some point during the installation?

 

Did you move the metal rub circle from the back of the original wheel to the new wheel

 

I've had this problem. You may need to adjust the metal clip on the back of the horn button to allow it to contact the metal on the wheel. Just pull the clip out a little bit. Not much is needed.

 

Thanks guys. It may be the metal rub circle from the original hub. I didn't use it for the new one so I'll fix that and see what happens. I'll also check the the metal contacts.

Thanks!

 

I have the same wheel just ground the wire if it works check the button. Factory ground wire to metal adapator, momo to ground tab in column.

 

The Momo button has a spade for the single black horn wire that is in the steering column. There is an extra spade on the hub adapter (circled in red) that is not used and needs to be bent in or cut off or it will potentially short circuit the horn. The button has a partial brass ring that makes contact with the hub.

 

Make sure this metal tab is making contact with the steering wheel hub. Mine was not and the horn did not work.

I GENTLY pried mine up and then cleaned it electrical cleaner, then used a pencil eraser on it to insure it was clean.

I'm betting this is the problem.

 

Awesome! Thanks for the pics and info. I'll check all these things and be back.

 

Update. I was trying to fix the horn (inop since purchased) after changing out pods last night. My burgundy pod is a cracked mess, I had some wiring issues (reseating connectors can work miracles) and I had a much nicer black pod from my parts car. The black pod in the burgundy interior actually looks pretty good.

I search Rennlist for "Horn". Right at the top is this thread. Yay!

It appears that not only was this thread about exactly my exact problem, but my particular car as well!

I read some of Will928's other threads and everything tracks - the work done, his location, color, interior, wheel, horn prob. etc. Too funny.

Anyhow, I was struggling to figure out some of the advice I was reading about wiring the horn up, seems Momo made about fifty different horn buttons.

So I ohm'd it out with a meter and one of the posts above makes perfect sense to me now, although it didn't when I read it.

There are three contact tabs on the back of my horn. One is "ground" on the outside of the horn button "frame". The other two are located in the middle and it is these two contacts which make a closed circuit when the button is pressed.

Luckily, Will left me a perfect length of wire with spade connectors in the drivers side door compartment. I just bridged from one of the inner contacts to the "ground" tab and attached the wire from the Horn Contact Ring to the remaining tab. Voilla!

I didn't want to take it apart again, so I sketched it. I know it's an academic problem, one which I solved in five seconds with a voltmeter, but I figured it might help somebody else not electrically inclined.