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86 C4 ABS LIGHT
My ABS Brake motor stopped working and I was told that there was a
special diagnostic tool made by kent moore that has to be used on this year. When I drive about 20 feet the light comes on and stays on, abs motor never comes on. Any Ideas or things I should check besides fuses and wheel sensors would be helpful. Thanks. |
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86 C4 ABS LIGHT
edsplacecars wrote:
> My ABS Brake motor stopped working and I was told that there was a > special diagnostic tool made by kent moore that has to be used on this > year. When I drive about 20 feet the light comes on and stays on, abs > motor never comes on. Any Ideas or things I should check besides fuses > and wheel sensors would be helpful. Thanks. > First open and check harness connectors for corrosion. Unplated copper with 20 years exposure to heat and moisture ...etc. While you're there, write down all the nameplate data on the ABS unit. The usual (4-5mph) test sequence checks wheel sensors, then positions the valves in bypass (so pump pressure doesn't go to the calipers), checks valve positions, then runs a pressure check on the pump. Failure of any of these things in the sequence can flag out ABS and turn the light on. Best bet is to ask around to find a brake guy with a test set for your ABS. My '89 C4 coupe has a Bosch ABS unit and our local Chrysler dealer has a test unit that works. (Local Chevy dealer gave up on Bosch ABS years ago, farms out the job to an independent brake shop who sends it to the Chrysler dealer. Chevy Service was clueless about this.) Good news is that several "no-loads" were making a couple of bucks off the job -- keeps the economy alive! -- PJ |
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