Horn not working

[mep12345]

Steve_earwig has been helping me with this on another forum, but now I've found the owners club was hoping someone else may be able to assist with my woes. Consequently some of the following is cut from several posts to try and tell the story so may not flow perfectly:

The horn on my daily driver, a Peugeot 406 2.0 HDi Estate, isn't working.

Having de-cyphered the fuse location description of "buzzer" as the horn I have checked that the fuse (engine bay fuse panel, Fuse 5) is good and that there is a good 12V to the input side.

Have checked fuse and voltages throughout system. 12V where expected and 0V where expected. The horn works when you bypass the relay (apply 12V direct to horn) and the relay changes over when you earth the terminal that is switched via the horn push; this also sounds the horn. All this pointed me to the horn push.

I have stripped the steering wheel and found my connectors are different to those in the Haynes manual and also the online page I found here: viewtopic.php?f=1&t=7617&start=0 , so does anyone know how the orange connector in the middle of the photos

http://i334.photobucket.com/albums/m405 ... CT0003.jpg

comes off (note Steve has found a reference that it just pulls out - confirmation would be gratefully received) so I can get the airbag pad away from the steering wheel.

Anyway, carefully holding the wheel pad I cleaned the horn contacts and checked them for continuity before and after but both were the same - no resistance when they make and open circuit when released as expected. I can't check voltage here as to do so would require the battery connected and with the airbag disconnected this is not possible.

Reconnected the wheel pad and checked contacts are making (you can hear a good click on contact) and also checked for resistance continuity using flyleads to +ve and -ve side of contacts. This seems to be working switching between open and short circuit when expected.

All this leads me to the conclusion that a wire is broken somewhere in the horn push part of the circuitry so intention is to run a new wire from fusebox to a new push button sited on the dash to right of steering wheel unless someone has any other ideas or knows of frequent wire break location or other areas to check.

Steve then posted a link to a berlingo wheel removal with the same connector and I thought that as the berlingo needs the shroud removed lets take mine off and I think the Comm200 on my car is also a little different to expected for a D9. Can I disconnect the orange connector in this photo

http://i334.photobucket.com/albums/m405 ... CT0005.jpg

or this

http://i334.photobucket.com/albums/m405 ... CT0004.jpg

to free up the airbag and pass through the wheel.

Unless I can find something soon I think I'm going down route of new horn push in fake wood trim to right of driver!!!!

Any help appreciated

Thanks

Mark

[mjb]

From your description I agree with your diagnosis and suggested remedy if the problem's not the steering wheel connector

[mep12345]

Have done it - run wiring for seperate horn push in blanking plate over diagnostic socket and secured diagnostic socket behind dash with rest of fuse board. Horn works fine from the push button.

BTW have found a source for the horn micro-relay (believe it is also used elsewhere) where they cost £4.99 instead of the £45+vat that the dealers want for them. If you want the web address let me know by PM and I'll email you

Mark

[coco]

http://i334.photobucket.com/albums/m405 ... CT0003.jpg

This looks the same as was on my Xantia and yes it just pulled off

Col

[tenwierdufos]

Yes you can just pull it off.

As with all airbags though its reccomended you disconnect the battery negetive terminal and wait for a few minutes before removing it, (make sure you have your code for the radio though if you have a factory fit radio still!) the airbag system has capacitors in it which store a bit of energy.

Dont want to risk having a face full of airbag going off

[mep12345]

thx, my radio doesn't have a code according to the manual as it is coded to the ECU so can't be used with another car. It also didn't need a code when the battery was disconnected for the work to get as far as the picture

Mark