Abs kicks On?

Good evening.

I would start by removing the new sensor and cleaning the mount on the hub. make sure it is cleaned of all rust and debris.

I would also do the right front as well. a common failure is the mounts get dirty and the air gaps get affected by that dirt. they set codes and have ABS activation at slow speeds just before stopping.

Also, no need to reset the codes. the ABS will test the system on startup and if there is no issues, the light will go out at five to eight mph.

Should I put the all spacers back in on the new sensor? Thank you for your help.

yes, I would start back at the beginning.

you are welcome.

glad to help.

How did you determine it was the left front sensor? Be sure there is no rust or crud between the sensor and the hub and check the tip of the sensor for contact. It is also very possible to have a problem on both sides but have the scan tool only show one. On a GM of that vintage I would pull both sensors, clean off everything and then start from there. On the shims, I take a wood dowel that just fits into the sensor opening. Slide it in until it touches the tone ring, now mark it right at the edge. Pull it out and compare it to the sensor. Add or subtract shims to leave the proper air gap.

my abs pump want cut off unless i take the fuse out how can i make it go off. and how can i keep my brake light on the dash from coming on since the fuse is out from the electrical box

It sounds like you may have a wheel speed sensor that is out. These videos will help us find the problem.

https://youtu.be/rTtAnsOlZU4

and

https://youtu.be/Pb6nXV-iamI

and

https://youtu.be/ANWVTh2RQoQ

and

https://www.2carpros.com/articles/abs-warning-light-on-easy-repair-guide

Please run down these guides and report back.

Hi,
Recenly my anti lock brakes began to engage at the very end of a stop. They only do this in the last half second or so until i am at a complete stop and at no other times, even if I apply very heavy brake pressure at a higher speed. There is no other indication of a problem ie. the ABS light never comes on. Any thoughts?

Could be a wheel sensor going bad and it just hasnt set a code yet. Might need to put it on a scanner anyway to watch the sensors or see if it has any failure records stored

thats what I was guessing, how do I find/inspect/clean/replace them?

The are mounted in the hub (bearing) assemblies. If you remove the wheel you will see the wiring, follow it to the ends

in dry weather, my abs brake motor / system comes on most of the time. why?

There may be a problem with one of the wheel speed sensors. If they're reading more than 2 or 3 mph difference, the ABS system will think one wheel is locking up and activate the system. You'll need a scanner to access this information in the PCM. Also, check for codes in the PCM. It may indicate which sensor or what the problem is. Get back with me if you need help...

When I come to a stop, the ABS kicks in quite frequently. I had new ABS sensors installed in the front but it still continues.

You need to have a scanner that is capable of reading codes and is capable of monitoring the wheel speed to see which wheel(s) are dropping out. May not have been the sensor replaced or it is bad, or another one is bad. May also be a harness issue.

I have a 2002 silverado 2500, 98,000 miles. ABS system going off at low brake speed. Mechanic said rust under sensors cost $228.00 to fix. Now having same problem with 99 Tahoe bought 6 months into 2000. now have 98,000 miles same problem only worse. Replaced rotors at 70,000 (2nd time). Am I having same problem I had with the 25000 ?. Repair manuel indicates I could have 2 wheel ABS system I see a module on the transmission could that be the ABS for a 2 wheel system. Did not see anything on front when I replaced the rotors. Can I fix the problem ?.brakes fade at times when the system ingages.

Is the ABS light on? If so you need to start by having the codes read, that will give us a place to start.When thesystem is engaging, are you on rough road? going over train tracks? something is common here besides thefact they are both Chevy's.If the road causes the tires to lose any contact with the road it will set off the ABS

[quote:a2b2f6fac6="2CarPro Jack"]Is the ABS light on? If so you need to start by having the codes read, that will give us a place to start.When thesystem is engaging, are you on rough road? going over train tracks? something is common here besides thefact they are both Chevy's.If the road causes the tires to lose any contact with the road it will set off the ABS[/quote:a2b2f6fac6]

The light does not come on also the light on the Silverado never came on before the repair. ABS engages only at slow stop, if I brake hard to complete stop abs does not engage if I use brakes to slow down to 1 or 2 miles an hour then softly stop that is when the problem occurs.

The sensors should be in the hub , not the rotor on that truck,check for any damage to the wiring, I havent come across this problem before.Does the ABS light come on in the dash when you first turn on the key?

Light comes on when I turn on key. Code reader shows "no codes". I will check wires. Thanks.

If all is ok, you may need to have ashop drive it with ascanner on it to watch the ABS system to see what it is doing.... without a code, we are just guessing

I have a problem when coming to a slow stop that my abs box will engage and cause the abs brakes to come on when unessecery. It is dangerous and was wondering if anyone else has that problem

Yeah it can be dangerous...if you really need to stop...IT can progress to no pedal AAHHH!!!!

You need a scanner to monitor the wheel speed sensors to find out what one(s) are dropping out...Probably going to be a speed sensor problem which may require a hub assy.