Pulsating Brakes - ABS Issues - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #1  
Old 09-10-2007
Johnny C's Avatar
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Pulsating Brakes - ABS Issues?

Hey all, I am new to the Forum. I just bought a 2002 Ranger EDGE 4X4, and I am already having brake issues. Sometimes when I hit the brakes, the pedal pulsates and goes to the floor. As soon as I release it, it is fine again. I am not losing any fluid or getting any idiot lights. It feels to me like the ABS system is bleeding pressure from the rear brakes because it thinks that a wheel is locking up. It seems to do it the most whenever I am coming to a stop downhill with the wheels turned. Straight line breaking it usually works fine. Any thoughts? Thanks for the help guys!
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  #2  
Old 09-10-2007
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https://www.ranger-forums.com/forum2...&highlight=ABS

Just found this by searching. Maybe I have a wheel speed sensor dropping out?
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Old 09-10-2007
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Can't really help with your issue but I love the avatar. PSU and the Steelers rule!
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  #4  
Old 09-10-2007
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Check for loose front wheel bearings.The Edge front abs sensor looks at a ring in the front rotors.If a wheel bearing is loose the rotor may be moving too far away for the sensor to "see" it.
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Old 09-11-2007
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O.K. thanks - I will check them out. Any other ideas from the Ford Gurus?
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  #6  
Old 09-11-2007
04 EDGE
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sounds like one of the front sensors are droping out at or under 5mph, very common on these trucks. you need a live data scanner to pinpoint what sensor it is.

welcome to R/F and good luck

Last edited by 04 EDGE; 09-11-2007 at 10:00 AM.
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Old 09-11-2007
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I have a problem that is something like that but my truck is a 2000 2wd and the front drivers side will click sometimes when I stop.
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  #8  
Old 09-11-2007
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I am having this problem also, does it help to clean the sensors? I know cleaning the rear sensor fixed it on my 2wd truck.
John
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  #9  
Old 09-11-2007
04 EDGE
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you can try. most of the time the sensor goes bad from rust build up in the hole, it pinches down on the sensor and ruins it.
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  #10  
Old 09-11-2007
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Can I just buy a sensor and plug it in to see which one is bad (trial and error) Why do I need a scanner? How many sensors are there?
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  #11  
Old 09-11-2007
04 EDGE
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the front sensors cost just over 100 bucks each!

there are 3 wheel speed sensors total on the truck, one on each front wheel and one in the rear axle housing.

you need a live data scanner to take the "guess work" out of it.
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  #12  
Old 09-11-2007
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I don't have this fancy data scanner, so I guess I will go with the trial and error method. It seems to only happen when I turn, so I would probably rule out the rear sensor. That leaves a 50/50 shot of success on the first try! 100 bucks is pretty steep, but I don't see any other solution short of just disconnecting the ABS (prob not a good idea for a DD). Thanks for all of the kind help!
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  #13  
Old 09-11-2007
04 EDGE
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from all the experiance i have with rangers and explorers 90% of the time its the right front sensor. you can buy a complete china bearing/with sensor for around 125 bucks
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  #14  
Old 09-11-2007
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Thanks for the great advice man! I am more of a GM muscle car guy, so this ranger stuff is a bit new to me. Let me know if you ever need any help with the GM LSx powered cars!
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  #15  
Old 10-10-2007
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Buzzing abs

I have the same abs 'drop-out- problem on my '99 4wd ranger - mechanic says I might need new hubs because you can't just change the sensors on these. Anyone ever work on this problem on a '99?
By the way - all those guys that say "just pull the fuse" are so out of touch with reality 'cause when you pull the fuse, you lose the speedo AND overdrive. That is not an acceptable plan - Oh, btw, you also get crappy shifts without that fuse in because the tranny uses vehicle speed to set the shift severity.
Thanks for your help, all
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  #16  
Old 10-10-2007
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New ford bearings with abs sensors can be had here for 200.

http://www.trademotion.com/partlocat...=1&catalogid=1

Can you just change theses sensors with out changing the wheel bearings?

If so i have a toasted whee bearing with a good abs sensor (has 125k) 25 shipped.
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  #17  
Old 10-10-2007
04 EDGE
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you CAN just change the sensor. 99's have PVH hubs and the bearing alone is almost 400 bucks.
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  #18  
Old 10-11-2007
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Quote:
Originally Posted by 04 EDGE
hubs and the bearing alone is almost 400 bucks.
Check the link, bearing is 200, hub is 100. Cost me 18 bucks for shipping, TX to IL.
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  #19  
Old 10-11-2007
04 EDGE
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ok heres your cookie
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  #20  
Old 12-08-2014
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I realize this is an old thread about 7 years old, If your having a pulsating brake problem, before shelling out all the money for new parts try cleaning the sensor and ring inside the rotor chances are that dirty parts are causing big problems making you think that your running bad rotors or sensors it worked for me I was thinking of replacing it all but after I cleaned everything up the pulsation went away...Steve
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  #21  
Old 08-04-2015
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02 Edge

Similar symptoms as many posters... low speed ABS activation. I removed the ABS sensor (broke it) and found a significant amount of grease on toner ring. Many teeth have grease that span from tooth to tooth. Has any one found that simply cleaning this grease off the toner ring solves the problem?
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  #22  
Old 08-08-2015
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Taking everything apart and thoroughly cleaning it worked wonders on my truck....was having same problems as described in this thread. Also was leaking grease from inside seal but seal has to be replaced when taking things apart anyway...
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