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Topic: ABS Brake System (Read 778 times) previous topic - next topic

ABS Brake System

Our ABS light on dash has been intermittent for a while. It is now on solid continuously.  I unplugged and re-plugged the ABS module (engine off, ignition off) with no change.  I have not yet pulled the top dash cover to read the ABS flashing light sequence.

I had ABS on cars before, but my previous 2 coaches had no ABS.  Is it truly valuable on a Foretravel given weight and brake system?  Just wondering about repair versus ignore.  I'll be in Nac the week of Aug 10 and can have it checked out there.
Dan - Full timing since 2009
2003 U320 40' Tag 2 slide

Re: ABS Brake System

Reply #1 –
Have you tried tapping on them lightly where they go into the brake-hub assembly?  One time that worked for me.  Sometimes they come unseated.
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Lynn & Marilyn Sickel
Tollville, AR
1997  U320  40'
2021 Chevrolet Silverado pickup
Motorcader  17257

Re: ABS Brake System

Reply #2 –
Personally, I have my doubts about the value in vehicles the size of ours -- except maybe for winter-time driving in snowy icy climes. 

Due to a seriously leaking front ABS valve that was obsoleted by Haldex (no replacement) my ABS has been disabled and the valve replaced with a standard relay valve.  I can't tell the difference, but I've also never had to do a complete panic stop.

There is the obvious trade-off.  If it is something as simple and (relatively) inexpensive as a sensor seems worthwhile to correct.  Beyond that it gets expensive quickly and a grayer decision.

Regards

1997 U295 40 with CAT 3126

Re: ABS Brake System

Reply #3 –
Quote from: Forewheelers –
Have you tried tapping on them lightly where they go into the brake-hub assembly?  One time that worked for me.  Sometimes they come unseated.

I haven't been under the coach to see how accessible they are.
Dan - Full timing since 2009
2003 U320 40' Tag 2 slide

Re: ABS Brake System

Reply #5 –
I counted the polling clicks today when ignition key is turned on.  All eight ABS sensors  "clicked" as normal.
Dan - Full timing since 2009
2003 U320 40' Tag 2 slide

Re: ABS Brake System

Reply #6 –
Finally have a definitive answer to what those switches are for.
 :D
2000 U320 mid entry  #5688
2006 Jeep Liberty


USMCR retired
SDFD retired
FEMA US&R TF8
 

Re: ABS Brake System

Reply #7 –
Dan,
All the ABS valve clicking tells you is the continuity of the ABS electrical circuit is ok. Unless you hear an air release for each wheel you don't know if those ABS valves work.
On my '95 if you pressed on the brake then turned the key on I would get two air releases for each wheel.
Not sure how to test the later system. Maybe if your foot is on the brake when you turn on the key you will get some air releases ? Should be a way to do the full test. Those valves may not have moved since they were built. Everything needs to be exercised.
John Duld
1995 U320C SE 40'