B/C Horn Diode and Board Computer Horn - Bimmerfest - BMW Forums

Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E28 (1982 - 1988)

E28 (1982 - 1988)

Thread Tools Display Modes
Old 09-08-2011, 05:20 PM
Tecmec Tecmec is offline
Registered User
Location: Connecticut
Join Date: Mar 2010
Posts: 21
Mein Auto: 1987 531is
B/C Horn Diode and Board Computer Horn

On the 1987 535i (pre March 1987 manufacture date) there are items called B/C Horn Diode and Board Computer Horn. Both are located beneath a plate just to the rear of the battery on the left side front of the vehicle. I need a primer on these items. I see both identified in pictures in the Factory electrical and trouble shooting manual but not a word in the Bentley manual or else where in the references I have. The way they came to light to me is I have a kill switch on my negative battery post. On occassions when I close the switch the horn will beep once or twice or for a second or so but not continue after the switch is closed. Can anyone educate me on these item and what they are supposed to do for the vehicle. Thanks
Reply With Quote

See More Related BMW Stories

Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E28 (1982 - 1988)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -7. The time now is 12:02 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
© 2001- VerticalScope Inc. All rights reserved.