Intermittent Horn - BMW Forum -
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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#1 (permalink) Old 01-22-2010, 08:54 PM
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Question Intermittent Horn

The horn in our M3/4 has become unreliable -- usually works fine, but sometimes not -- esp. when cold [PA winter here]. When malfunctioning, repeated pressing all around the center horn/airbag pad may get an occasional toot, but not for pressure in any particular location. My mechanic [a bimmer specialist] removed the airbag & cleaned horn contacts, but the problem remains. He suspects we may need a new steering wheel [ouch] but I'm not convinced. Why does is it usually ok?! Relay perhaps? Anyone out there had similar problem? Ideas?
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#2 (permalink) Old 01-22-2010, 11:05 PM
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Sounds more like a bad connection or broken/damaged wire in the loom. If you hook 12v straight to the horn, does it sound as you'd expect, if not, maybe its a faulty horn?
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