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Old 02-21-2001, 02:59 PM
Registered User
Join Date: Feb 2001
Location: Austin, Texas
Posts: 70
I was following a previous posting on this subject and I have already cleaned the leads at the front calipers and disconnected the battery for an hour, but my light still stays on. I looked at the rear, but didn't see anything similar to clean. Also, sometimes when slowing down, right before you come to a complete stop I've noticed that the brake pedal pulses as when the antilock functions. Any help on this?

87 190DT
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Old 02-21-2001, 04:03 PM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
If the light comes on immediately before the wheels move, cleaning the sensors isn't the problem.

An open circuit in a sensor, a lack of power to the control unit, a defective alternator, pump relay problems, and a bad controller are some of the things that can set the light before driving.

If the light comes on at about 5mph and stays on then a sensor signal is likely the problem. Unfortunately your car is too old for self-diagnostics. We use the Bosch LED Tester to test these old systems. It attaches to the harness after the controller is disconnected. It tests in minutes what a good plan and a wiring diagram will take hours. Probably best left to someone with the tool.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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Old 02-21-2001, 09:58 PM
Beatle Juice
Posts: n/a
How is your car running? I have seen the ABS light come on the 5 prong over voltage relay is bad. May not apply to your car though. Just a thought...

Good Luck...
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Old 02-22-2001, 03:02 PM
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Join Date: Feb 2001
Location: Austin, Texas
Posts: 70
It has been running just fine. The only thing I've noticed is the brake pedal pulse occassionally right before coming to a complete stop. The antilock light sometimes dims just a bit when applying the brakes.
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