Re: <E28> ABS Brake Diagnosis

["David R. Lefebvre" <drl@xxxxxxxxxxxxxxxxx>]

If you have a garage, try blowing compressed air in between the sensors and 
the brake mechanisms. Use a respirator. If you do not have adequate space 
and a respirator, dismantle and clean the brake dust out of the ABS sensors 
using brake cleaner. An 85 BMW with ABS was an advanced car for that year. 
Since you have an ABS indicator on the dash, you most likely have it.

As far as the unit, you should be able to see it under the hood if you have 
it. All of your brake lines will be tied into it bigger than Dallas. It 
will likely be towards the front of the engine compartment. Good luck.

At 10:12 AM 3/3/03 -0500, you wrote:
>Hi All,
>
>On the ABS Note, I while ago I posted a thread wondering if I in fact had
>ABS on my 85 535i.  I was told that there might be a unit, and might not be,
>and to look under the hood for a control unit.
>
>Well I was thinking I would take a look that weekend, and then the following
>morning I was on my way to work, and looked down at my dashboard, and
>noticed the ABS warning light was on.  This told me that I must have abs if
>the light was on.   There was snow on the ground, and when I came to a stop,
>the pedal started to vibrate, consistant with ABS braking.  This is the
>first time that happened.  A few hours later, the light was off, and the car
>hasnt done this since.  The tires have locked up a few times in the snow
>since and no pedal vibration.
>
>I have not changed, unplugged, or done anything to the relays.  I have also
>not done anything to the brakes after the light came on and then
>mysteriously disappeared.
>
>Any ideas why the light would have come on all of a sudden out of the blue,
>and at the same time why the system started working?.     I would have
>guessed that the ABS warning light would come on in a malfunction, not when
>the system suddenly started to work.
>
>Anyway.. Now, back to the way it used to be when I got the car.  No light,
>no ABS functionality..
>
>Any suggestions?
>
>Cheers
>Ron J
>Toronto, Canada
>85 535i
>73 911s 2.7
>--
>to be removed from bmw, see /bin/digest-subs.cgi
>or email "unsubscribe bmw" to majordomo@domain.elided

------------------------------