ABS Control unit

[Sandy Duffy <sandyduffy@home.com>]

>Return-Path: <owner-quattro@coimbra.ans.net>
>From: steveb@falcon.kla-tencor.com (Steven Buchholz)
>Date: Mon, 22 Dec 1997 09:39:18 -0800
>To: quattro@coimbra.ans.net
>Subject: ABS Control unit
>Sender: owner-quattro@coimbra.ans.net
>
>Here again ... '88 5kCSQW
>
>I've been dealing with a solid on ABS light for a little while now ... 
>so I thought I'd try to resolve it before the trip.  I had already 
>attempted a swap of the power relay from a working car to no avail.  
>Bentley also states that it is important to have the D+ line from the 
>alternator connected.  I confirmed this voltage looks good last night.  
>I checked the resistance of the sensors per Bentley as well ... all 4 
>look good.  The symptom is that when the car is started the ABS OFF 
>light never turns off, so I don't suspect any sensors in any case.  
>I'm getting to the point that I'm thinking its a problem inside the 
>ABS control box.  Has anyone out there delved into one of these?  If 
>so, are there any fuses or other known failure points inside?
>
>TIA for any experiences!
>
>Steve Buchholz
>San Jose, CA (USA)


Steve:
Check the connector going into the brain under your left rear passenger
seat.  I've had mine come loose and exhibit similar behavior.  Remove the
connector and put it back on several times.  In my case, at least, this
fixed the problem

Sandy