Hello everyone.
I have a horn problem on my '93 E36 325i convertible Euro Spec.
I have the 3-spoke sport steering wheel, without airbag. You can see it in the picture (even if disassembled and just placed in position).
I realized that the horn only works if I press on the right spoke, it doesn't work if I press on the left one or on the bottom central spoke.
Since it works on the right spoke, its entire electrical system is OK (horn, fuse, relay, sliding contacts, wiring, ground....).
There must be a problem with the steering wheel contacts.
I dismantled the steering wheel as you can see in the pics, in the 3 push areas on the steering wheel there are 3 contacts on the cover which, when pressed, come into contact with the copper-plated areas of the steering wheel base (you can clearly see the imprints of the contacts themselves) causing the electrical contact to close and the horn honking.
Cleaned the contacts, cleaned the copper areas, put some grease for electrical contacts, nothing happened. Everything just as before.
I did a test with a copper cable: I connected a contact point on the cover iwith its copper-plated area on the steering wheel base. Nothing is happening.
Instead it happens (not always, I have to move a bit with the test cable) that the horn sounds if I touch the area of the steering wheel base immediately close to the copper-plated area.
In short, it almost seems that the copper-plated area that should favor the contact and closing the circuit is isolated from the base of the steering wheel.
And this is the same for the left racespoke as for the low central spoke.
I don't know what exactly the problem could be and therefore how to solve it.
Do you have ideas? has this happened to anyone?
Thanks for your help
Greetings