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Re: intermittant honking (archive)
[ Follow Ups ] [ 3-series (E30) Message Board ] [ Msg. Board FAQ ]
Posted by Dilberto on May 01, 2001 at 03:33:01:

In Reply to: Re: intermittant honking posted by John on April 30, 2001 at 11:53:02:


Crazy but you might need to look under the steering wheel behind the kick panel-- there is a green circuit board that has two green plugs with 4 wires apiece connected to it. This circuit board is on the left side right behind the knob for the headlights! One of the two relays is the Horn and this horn relay is uncovered and usually has a tiny spring that holds it open (not powered). if this board is not in its proper spot (hanging) or the spring is broken bumps in the road, door slams, gremlins will make your horn honk...This sounds like a loose wire. check by lightly shaking wires and CAUTION: don't have the keys in when you do this... this same board has power on it when the keys are in... Hope this helps...
John 1987 325i

325i conv. - horn honks for no apparent reason at no consistent time, just when it feels like it. Sometimes just opening the door will do it. Any probable reasons? Thanks.

That's very odd, I'm not sure what would make that happen. Maybe your car is trying to talk to you:)


Its an OBC security problem. Trust me, somebody tried setting the alarm, but aborted the operation without resetting anything. Try cutting power to the OBC for 10min. Then reconnect the battery negative terminal. You may have to reset the OBC all over again. For it to function properly- the display must read, "----UhR". Then refer to the owner's manual to reset...If you get a, "----PPPP" error, then the OBC is bad, and needs replacing. Be sure the coding plug for your particular model is labeled, "3 12 TYP". Email me if your Gremlins continue to haunt you...

Zach
ASE-II BMW Master Technician(1982-1991)
E21/E24/E28/E30/E31/E32/E34/E36/E9


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