November 16, 2009 11:06AM
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Registered: 15 years ago
Posts: 8 |
Having ABS problems, and hope it's not the main controller. 1988 325is.
After starting up, the brakes are intermittent -- usually think I need to be ready with the hand brake. After a minute or two of driving (whether brakes have been applied or not), the system check determines that the ABS is not working properly, the ABS dash warning light comes on and braking resumes to normal (obviously in a non-ABS mode). Would a bad connection from one of the wheel sensors cause this behavior? A failing sensor? The module? Or something else? Thanks for any input. |
November 16, 2009 08:55PM
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Registered: 15 years ago
Posts: 1,869 : Amagansett, New York |
November 17, 2009 07:25AM
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Registered: 15 years ago
Posts: 8 |
November 17, 2009 11:26AM
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Registered: 15 years ago
Posts: 1,869 : Amagansett, New York |
November 17, 2009 07:28PM
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Registered: 15 years ago
Posts: 183 |
Hi Bushog,
Hopefully you can get your ABS working again. I've never had problems with my ABS (touch wood), but the Bentley suggests checking the pulse wheel for 1 no missing teeth or cracks 2 it is not loose or out-of-round 3 faulty wheel bearing causing the clearance to be out (but surely you'd notice other symptoms of a shot wheel bearing too??) 4 dust, including brake dust Hope this helps, Simon |
November 18, 2009 02:23PM
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Registered: 15 years ago
Posts: 1,869 : Amagansett, New York |
November 19, 2009 05:32AM
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Registered: 15 years ago
Posts: 8 |
There is a relay, with an internal fuse, as you describe, Rick. When the fuse blows, the light is never out, as there is no power to the system. My fuse blew a couple of years ago (easy to do if you mishandle the the battery circuit), and I replaced the relay/fuse combination -- so I doubt the relay is bad (although it's certainly worth checking!) Thanks for the reply.
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November 19, 2009 01:54PM
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Registered: 15 years ago
Posts: 1,869 : Amagansett, New York |
I think there was a substitute in line fuse people used instead of the relay, but here again I'm no expurt on this .... Rick |