anti lock brake light

my anti loc brake light came on last night.i don't know what's wrong with it.the ABS dose not work any more.the light comes on when i am driving(not when i hit the brake) when i turn the car off and on again the light will go off but when i start driving it will comes on after 10sec.dose any body knows what's wrong with it?

[Texan94SL]

You should buy a service manual on CD and diagnose the problem. Post a listing for the CD in the parts wanted area. I'm sure someone has one to sell.

Meanwhile you can open the fuse box near your air cleaner box and use a 10mm socket to pull the yellow fuse on the upper left corner. Do that and you will disable the ABS system completely.

Do you hear a humming noise from the front right fender after you stop and shut off the engine? If so you have a bad ABS relay or a faulty modulator. That hum is of a high current motor and you need to disable the system to avoid draining your battery.

Get the CD or a paper version of the service manual; it is worth every penny.

Originally Posted by Texan94SL

You should buy a service manual on CD and diagnose the problem. Post a listing for the CD in the parts wanted area. I'm sure someone has one to sell. .
Meanwhile you can open the fuse box near your air cleaner box and use a 10mm socket to pull the yellow fuse on the upper left corner. Do that and you will disable the ABS system completely.

Do you hear a humming noise from the front right fender after you stop and shut off the engine? If so you have a bad ABS relay or a faulty modulator. That hum is of a high current motor and you need to disable the system to avoid draining your battery.

Get the CD or a paper version of the service manual; it is worth every penny.

no ,but i hear it when the ABS is working(when i hit the brake hard).the wierd thing is when the light is off the ABS works but when the light is on the ABS won't work any more

[bjmsam]

Originally Posted by mehrshadvr4

the light comes on when i am driving(not when i hit the brake)

I just had new control arms installed (which should have nothing to do with the ABS) and am now observing the same behavior - the ABS light flickers at startup and stays off until I start driving, when it consistently illuminates. According to the manual, this is indicative of a faulty speed sensor, but it is not clear how to check the ABS ECU codes without a MUT, and a quick search on 3SI reveals no clear procedure for doing so. Has anyone done it? How? I can see ECS codes by jumping pins 4 and 5 and connecting a voltmeter to the jumper (-) and to pin 3 (+) and watching the needle deflections... is there a pin for ABS codes?

[z1968]

Originally Posted by bjmsam

I just had new control arms installed (which should have nothing to do with the ABS) and am now observing the same behavior - the ABS light flickers at startup and stays off until I start driving, when it consistently illuminates. According to the manual, this is indicative of a faulty speed sensor, but it is not clear how to check the ABS ECU codes without a MUT, and a quick search on 3SI reveals no clear procedure for doing so. Has anyone done it? How? I can see ECS codes by jumping pins 4 and 5 and connecting a voltmeter to the jumper (-) and to pin 3 (+) and watching the needle deflections... is there a pin for ABS codes?

Sorry to bump an old thread, but I'm experiencing the *exact* same issue as described by bjmsam above!

What's worse is that my mechanic can't diagnose it with his machine and even the local Dodge/Chrysler and Mitsu dealers are telling me they can't diagnose ABS issues with cars older than model year '99 - WTF?!

Any advice?? Please help!

[T-Kay]

I have exactly the same issue and have had it basically since I bought the car. The light only comes up when the car starts moving. The ABS does not work at all.

I thought it might be just a dirty sensor, but usually with a dirty sensor the effects would be ABS would be turning on all the time, since the sensor would be communicating that you lost traction to the ECU. Right?

My mechanic tried to clean it with air pressure a few years back and that has not helped. We never disassembled anything though, so it is possible we were not getting enough pressure on the sensor to clean it.

What can we do?

[Lionhearted]

I have the exact same issue. Subscribing, hopefully someone will find the cure.

[senecachief]

My experience is that the ABS works, but the light can come on for a month at a time. After 5 years I just pulled the light.

[tarfin]

So it only happens while the car is moving? If you come up to to a stop sign or red light, the ABS light goes out?

Edit: reason for asking is the ABS system on most cars does a self-check the 1st time the car hits 10MPH to ensure the pump, sensors, etc are all talking. If the light comes on after that it indicates a component is toast or at least the computer isn't able to receive the input.

Here's a link that may help:

Saturday Mechanic - Troubleshooting Antilock Braking - Popular Mechanics

[tarfin]

Did anyone look at the link I posted and try what the article suggests? Had a 96 Taurus that had an ABS Light on. Turned out to be a bad ground to the computer itself so might wanna double check that as well.