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  #1  
Old 10-01-2007, 08:03 PM
TTCummins's Avatar
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ABS light on, any ideas where to start?

Pretty vague, I know, but at a first glance the fuse looks ok. Any common failures with these? On the trucks I have worked on in the past, it has been wheel speed sensors that fail most often, but I wanted to see if anybody had some input on the subject.
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  #2  
Old 10-03-2007, 05:26 PM
Wayne
 
Join Date: Jul 2007
Location: Rockport, TX
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I had problems with the 3rd brake light and socket blowing the fuse for the brake lights, ABS and Cruise control on my 350D. Never did figure out what I did to fix it though, it just quit eating fuses.
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  #3  
Old 10-03-2007, 06:00 PM
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Try cleaning the sensors at each of the wheels. Sometimes brake dust collecting on them can cause false lights.
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  #4  
Old 10-03-2007, 09:07 PM
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a couple of choices

There are many causes for ABS issues from my experience... some simple things to look at:

- voltage, sometimes a failing charging system will trigger ABS alerts
- the wheel sensors can get dirty or the "teeth" in the back of the rotor can be filled with crud. Clean with brake cleaner or solvents.
- wires are worn, trace them down from the wheel sensor to the ABS computer
- the rest are more difficult debugging / testing problems that will require some info on the test processes for ABS computers, wiring, relays....perhaps the others can suggest alternate approaches.

The solution on my old car was a front left wire was worn through and causing shorts. Replaced and the issues went away.

Chuck
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  #5  
Old 10-03-2007, 10:13 PM
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On the newer models a failing battery is by far the most common fault.
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  #6  
Old 10-03-2007, 11:00 PM
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Quote:
Originally Posted by muleears View Post
Try cleaning the sensors at each of the wheels. Sometimes brake dust collecting on them can cause false lights.
That worked to solve my problem. It was a PITA to pull one of the sensors.
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