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Old 08-07-2013, 07:26 PM   #1
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Fluid Level--Master Cylinder?

This thread applies to 03 and earlier [non-adjustable pedals but with 4 piston calipers]. While chasing a recent "brake pedal went to the floor" issue, I decided to fill my remote brake fluid reservoir slightly over full [eg, just above the molded ring on the reservoir]. I cant explain the root cause here but the intermittent ABS light on my dash that has haunted me for years has now been off for two days of driving--incredible!!!!!! At this point, I am wondering if the location of the remote reservoir vs the master cylinder, requires the reservoir level to be absolutely full or perhaps slightly above full to keep the ABS light off. Only time will tell.

PS--will save the "pedal to the floor" story for another day.
PSS--while looking over the ABS literature on the ACA website, I learned that the "honey-like" substance I found floating on top of the brake fluid in the reservoir when I first got the coach, was probably the silicone lube that was used when the brake components were assembled--common and not a problem--but remove it.
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Old 08-13-2013, 04:51 PM   #2
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yes the reservoir must be kept full or the abs light will come on
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Old 08-13-2013, 09:09 PM   #3
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Not sure I agree. The wiring diagram shows that the fluid level switch will trigger the "service brake" light, not the "ABS" light. The Wabco ECU does not show any connection to the fluid level switch. I can't explain how that fixed your problem Old Scout, but whatever works.
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Old 08-14-2013, 07:54 AM   #4
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Yup--I prefer to "understand" what went wrong and how it was corrected but in this case, it appears I may never know why the ABS light was going on and off from time to time. No real rhyme nor reason as to when the light would come on--except that it often came on after the engine had idling for a while. I usually like to have some "facts" when commenting on the forum but I recalled that several other owners have had ABS light issues with no obvious cause or solution.
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Old 08-14-2013, 11:46 AM   #5
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On those model years one thing that could make the ABS light come on, is where the ABS wire pushes into the backing plate. WRV told me when I had my 2000 to push it in firmly and twist a little. It has to make contact with the ring teeth.
You won't hurt anything pushing it in a little.
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Old 08-14-2013, 04:24 PM   #6
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Kraig--good input but I have been there and done that--even have a t-shirt for it. According to the ABS literature, you set/position the sensors by pushing them against the ring teeth, then let the "wobble" of the wheel bearings adjust the gap.
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