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Old 08-07-2010, 07:26 AM   #1
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ABS Problem

We have had an intermittent ABS problem on our 2007 Fleetwood Excursion on a Freightliner chassis since it came from the factory. It never shows a code when a service tech checks the problem.

I have narrowed down the situations where the ABS light comes on. It is clearly a "heat" related problem. In hot climates (Houston) the light will come on about 30 minutes after starting to drive. It will sometimes cycle off during a brief rest stop but will normally be off the next morning before starting the same cycle.

Now that we are in Michigan, it stays off the entire time we drive.

Is it the brain? Is it a sensor that is too sensitive to heat? How do I determine the culprit without spending a bunch of money on replacing parts to isolate the problem?
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Old 08-07-2010, 09:17 AM   #2
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can you run a fan on he sensor box or isolate the sensor with a heat shield. Cheap try, but we used to have to do that with 454 starters. It worked.
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Old 08-07-2010, 09:31 AM   #3
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Not sure about yours but wet weather last winter caused my sensors to cloud over and generate the fault. They actually cleared themselves when the weather changed.
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Old 08-07-2010, 10:36 AM   #4
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intermittent electrical problems are the toughest to diagnose and fix without throwing alot of money at it. I had a similar ABS light problem where my ABS light and buzzer would come on intermittently and stay on but it was finally determined to be a short in my electronic information panel. Mine was covered under warranty and if your ABS computer is made my Arvin-Meritor it is a $4000-$5000 replacement item. I know because the service center thought it may have been the ABS computer and Arvin Meritor told them the diagnostic procedures using a laptop to communicate with it and the ABS sensors to test each sensor independently. Arvin's told us the price for a new ABS computer but, also said they had never had one fail. With a new information center it has been over two years with any problems.
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Old 08-07-2010, 11:46 AM   #5
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Quote:
Originally Posted by buck62 View Post
intermittent electrical problems are the toughest to diagnose and fix without throwing alot of money at it. I had a similar ABS light problem where my ABS light and buzzer would come on intermittently and stay on but it was finally determined to be a short in my electronic information panel. Mine was covered under warranty and if your ABS computer is made my Arvin-Meritor it is a $4000-$5000 replacement item. I know because the service center thought it may have been the ABS computer and Arvin Meritor told them the diagnostic procedures using a laptop to communicate with it and the ABS sensors to test each sensor independently. Arvin's told us the price for a new ABS computer but, also said they had never had one fail. With a new information center it has been over two years with any problems.
I don't know who makes the ABS computer but it is good to know their failure rate is extremely low.

I was hoping RVWizard might have an answer.
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