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Unread 12-17-2008, 08:55 PM   #1
steve L.
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1997 ZJ 
 
Join Date: Sep 2007
Location: New Jersey
Posts: 521
Anti-Lock Brakes

okay so winter is approaching and there is something that is bothering me. Ive had my Jeep for about a year or so now, and the anti-lock brakes have never gone off on me yet.(yes i know that is possible) But how can i tell if they are bad or not? or better yet is there a way i can put them to the test so i can tell if they are broken or not? If they are broken, then that would not be good once the snow and ice hits
thanks you guys

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Unread 12-17-2008, 09:15 PM   #2
ZeeJay1997
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1997 ZJ 
 
Join Date: Dec 2008
Location: Sweet Home, Alabama
Posts: 6,886
If your abs light comes on when you turn on the key, then goes out after about 10 secs, their probably okay. One way to test is to get on a gravel road or some ice (make sure the coast is clear and nothing in the cab will fly) and lock them down. You should feel it working. If your wheels lock, something is wrong. The Teves system is normally reliable unless the light stays on.
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Unread 12-17-2008, 09:19 PM   #3
JFM626
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2004 TJ Wrangler 
 
Join Date: Feb 2005
Location: Tyee Capital of Canada
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Get on a quiet straight road, go about 40mph. Now hit the brakes as hard as you possibly can. Do not let up on the brake pedal unless you start to skid. If the abs is working, you will feel and hear a pulsing sound coming from the brakes and there will be no skidding. They may lock up around 10 or so mph. If you just go into a skid then they are not working.
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Unread 12-17-2008, 09:31 PM   #4
steve L.
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1997 ZJ 
 
Join Date: Sep 2007
Location: New Jersey
Posts: 521
hmm alright. thanks. the abs light is not light up on my dash. I will give them a shot sometime tomorrow maybe.
I was just thinking maybe i havent ever come in a situation to where i never needed them to go off. and if im correct some anti-lock brakes are more sensitive than others. so maybe i dont have a sensitive one.
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97' ZJ Laredo, I6, NP242

A Little Taste of Jersey Wheelin Of A 1997 & 1998 Jeep Grand Cherokee's For Your Enjoyment.

http://www.youtube.com/watch?v=sxa3-LJhz-Y
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Unread 12-17-2008, 09:41 PM   #5
JFM626
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2004 TJ Wrangler 
 
Join Date: Feb 2005
Location: Tyee Capital of Canada
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Anti-lock brakes should only be sensitive to the friction between the tyre and the road surface Once a sensor near the wheel senses lock up it passes the message on to the abs module which then releases the hydraulic pressure to the wheel in question. This release and subsequent reapplication (by your foot) can happen many times a second. Thus the pulsing sound and sensation.
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