horn issue

Post Sat Apr 27, 2013 5:44 pm

Hi guys I was hoping if someone could help me with this issue I have everytime I press the horn button it works and also thrn trips the fuse...im due a MOT in 2 weeks and need all the help I can get guys cheers

Post Sat Apr 27, 2013 5:49 pm

If you're blowing a fuse it suggests there is a short, you'll need to check all the wiring on the horn circuit.

Post Sat Apr 27, 2013 6:53 pm

NOTHING anywhere near the steering column can blow the horn fuse. The horn is controlled by a relay (K2), configured in an "earth to operate" mode on the control coil side. The most a short can do is to operate the horn.
If the fuse blows when the horn button is pushed, the problem is between the fusebox and the horn itself, including the horn, unless you have a very unusual problem with the relay, or a fitting a fuse smaller than it should be (15A). DO NOT fit anything bigger than this.

Post Sun Apr 28, 2013 6:08 am

Thanks guys when you say check the wiring on the horn circuit what does that consist of..making sure any earth points are ok or looking for a damaged wire? Would this have anything to the wiring that goes through the passenger side door? Pulled that out last night and a few pins look like the don't exist anymore?

Post Sun Apr 28, 2013 1:59 pm

The wire runs from the fusebox down the LH inner wing, and from there it varies depending on which E30 you have, which you haven't told us!
Chances are it's one of the horns or horn that's faulty. Unplug it and see if the fuse blows.

Post Sun Apr 28, 2013 6:24 pm

Sorry Brian the one I have is convertible 325i...I currently have a pair of aftermarket snail horns on the left hand side im not sure if the convertibles are meant to have two because when I bought the car it didnt have one are the convertibles meant to have two horns or just one?

Post Wed May 01, 2013 8:58 pm

Post Wed May 01, 2013 9:49 pm

AFAIK, the same applies to cabs. as to any other E30 - weedy engine =weedy horn.
Yours, being a 325, should have two horns, one above each front brake air duct.
If there's anything aftermarket on any E30 relevant to any problem you have, then that's the first place to look. Almost all aftermarket stuff is produced to a fraction of the standards of the genuine item.