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Old 07-05-2017, 06:36 PM   #1
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Problem with ABS light

Hi there! My husband and I finally made the leap of faith. After owning a gas powered RV for 5 1/2 years, we just bought a beautiful 2003 Discovery 39S. Our first diesel! A few days after we bought it, we decided to take it for a short spin and noticed that the ABS light on the dash is not going out. Any thoughts or suggestions? We can't find any literature in any manuals that came with the coach. Other than that, it runs like a top.
Thanks!
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Old 07-05-2017, 06:46 PM   #2
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ABS lights staying on is usual a result of one of the sensors being out of adjustment which is a simple fix. Easy thing to do first is check all the wheels to make sure the sensor hasn't come out of its holder.
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Old 07-06-2017, 12:32 AM   #3
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The chassis manufacturer should be able to provide info on your ABS system.
Maybe even in the form of a pdf, by e mail.
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Old 07-06-2017, 06:05 AM   #4
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Get specific information on the ABS manufacturer and the chassis manufacturer. In most cases there is a way to check the codes.

In my case it is a bendix system and I have a small control module in my front electrical run bay. I can check the codes by following a procedure. Last problem I had showed the front drivers side sensor wasn't working right. Pulled it out, cleaned it, reinstalled and this fixed the problem.

I can access the front wheel sensors easy. The rear wheels I can't easily get to.
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Old 07-06-2017, 10:18 AM   #5
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Problem with ABS light

Problem solved! Had new tires placed on the coach this morning. They checked all sensors, secured them for me. ABS is now minding it's manners.
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Old 07-06-2017, 10:24 AM   #6
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Thanks for wrapping up you post ; glad it was an easy fix.
It would still be worthwhile to contact the chassis manufacturer for info on the ABS system to have with you should the need arise.
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Old 07-06-2017, 03:34 PM   #7
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The most common failure of a ABS wheel sensor is the movement of the front wheels and the movement of the cable... the cheep wire in the cable finally fails due to constant movement.... isolate the sensor by disconnecting the cable, and connect to an ohm meter.... move the wheel from L to R and back again.... if the ohm meter moves from a reading to infinite and back again you've found the cable....

In most cases there is a specific cable routing to prevent the stress of the cable from hanging from its own weight and the volume of air passing by it, to keep it from flapping in the wind....

Best of luck..
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