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Re: ABS Control unit

At 09:39 AM 12/22/97 -0800, you wrote:
>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)
A fellow here in Portland had similar problems with his '87 5ktq.  In his
case a bad wheel bearing had enough "slop" (tech. term) to cause the ABS to
stay off.  He swapped my known good ABS control unit into his car a couple
of times because he was sure he checked everything else out.  I haven't
heard of those ABS boxes failing, but you never know...