ABS and Traction control light on

Discussion in 'SN95 4.6L Mustang Tech' started by rugman1969, Sep 30, 2006.


  1. rugman1969

    rugman1969 New Member

    Joined:
    May 7, 2006
    Messages:
    12
    Likes Received:
    0
    Trophy Points:
    0
    Can anyone help me? My abs and traction control light came on and stay on, all the time(as long as the car is running). A friend of mine cleared the codes for me, but as soon as you start the car, they come back on. The only code found was a shorted brake fluid level sensor. Does this sound like something that could cause this? He could not get into the abs system to see if any codes were in it, so I am trying to find out any info I can. I called Ford, and they only list a brake fluid level switch. Same thing? Any help would be appreciated. Thanks.(2001 Mustang GT all stock coupe)
    #1
  2. Mustang5L5

    Mustang5L5 Car used in adult film "Highway Gangbang-InDaButt" SN Certified Technician Founding Member

    Joined:
    Feb 19, 2001
    Messages:
    21,625
    Likes Received:
    306
    Trophy Points:
    124
    Location:
    Massachusetts
    There is a way to read the ABS codes, but i think you need a special scanner.


    Right off the top the first things i would do is to unplug the 4 speed sensors on each wheel and measure the resistance. If one of them is open, then you need to replace that sensor.

    9 times out of 10, ABS problems are linked to faulty wheel sensors. If you can somehow read the ABS codes it will tell you which one.

    I know on my Mark 8, i could ground the ABS test plug and the ABS light would flash the codes to me and tell me which sensor was bad. I don't think the Mustang can do this though :(
    #2
  3. StangPro

    StangPro New Member

    Joined:
    Sep 30, 2004
    Messages:
    441
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Roseville, MI
    Either a wheel sensor or your ABS module is dead.

    If you can pull ABS codes, it isn't the module.
    #3
  4. LT.SAVAGE

    LT.SAVAGE New Member

    Joined:
    Sep 24, 2006
    Messages:
    21
    Likes Received:
    0
    Trophy Points:
    0
    Just take it to a shop and can it scanned. That will tell you your problem
    #4
  5. WashburnGT

    WashburnGT New Member

    Joined:
    Apr 22, 2005
    Messages:
    33
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    I-70
    Not true...My car was throwing a code saying the LR sensor was bad. I replaced
    it and it still didnt work. It ended being the module that was faulty. So...your
    car could still throw some codes, which may or may not be accurate.
    The best thing you can do, short of taking it to a shop to get checked out, is to
    do what mustang5L5 said and unplug the sensors and check the resistance.
    Otherwise just take it and have it scaned...let them figure out what the problem
    is and fix it yourself. The sensors and the module are pretty easy to replace.
    #5
  6. Mike97gt

    Mike97gt it doe snot Mod Dude Founding Member

    Joined:
    Jan 26, 1999
    Messages:
    12,473
    Likes Received:
    2
    Trophy Points:
    79
    Location:
    the people's republic of massachusetts
    most abs problems are related to the sensors, the tonerings or the wirring to the abs module. If you can get the code pulled that will help tell you what area to check.
    #6
  7. TenaciousD

    TenaciousD Founding Member

    Joined:
    Sep 15, 2001
    Messages:
    321
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Tampa,Fl
    Did you ever get the problem fixed? my ABS light and traction controll have be on for a yr now but im looking to trade up so i wanna get it fixed be for i sell her.
    when it first started the abs light came on and the traction controll button woulf not light up (so i thing it was off) but every now and then they woulf start working for a few days, but for the past 8months abs lights is stuck on and traction is stuck off.
    #7
  8. mustanggt3685

    mustanggt3685 New Member

    Joined:
    Oct 8, 2005
    Messages:
    133
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Illinois
    I don't have the traction control, but my ABS light has been on forever. I talked to a ford mechanic and he said it was rather common for the light to come on and stay on. But the ABS works just fine. Like stated above, it is more than likely a sensor issue.
    #8
  9. TenaciousD

    TenaciousD Founding Member

    Joined:
    Sep 15, 2001
    Messages:
    321
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Tampa,Fl
    yeah my abs woks fine too, its just the light, which is somehow related to the traction control sensor
    #9
  10. chuck943

    chuck943 New Member

    Joined:
    Oct 27, 2002
    Messages:
    262
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    north carolina
    The anti-lock brake control module is self-monitoring. When the ignition switch is turned to the RUN position, the anti-lock brake control module will do a preliminary electrical check, and at approximately 8 mph the pump motor is turned on for approximately one half-second. Also during all phases of operation the anti-lock brake control module (after the vehicle is in motion) checks for correct operation of the anti-lock brake sensors.
    If your light is coming on as soon as you start it then it is failing the peliminary check which means you have an open/shorted circuit or commonly known as a hard fault. All though wheel speed sensors are the most common problem on ABS systems they usually don't show up until vehicle is in motion, unless you have an open or shorted circuit to one of them. I would check all my fuses first :
    Central junction box (CJB) Fuse:
    5 (15A)
    15 (10A)
    29 (15A)
    33 (15A)
    35 (15A)
    Battery junction box (BJB) Fuse:
    ABS 1 (50A)
    ABS 2 (20A)
    If all of these are ok then I would get it scanned for the correct code before doing anything else to it.
    #10
  11. Dusstbuster

    Dusstbuster I love meat more than anything! I just have a spec

    Joined:
    Jun 1, 2004
    Messages:
    1,696
    Likes Received:
    43
    Trophy Points:
    49
    Location:
    Moorhead, Minnesota
    My HCM is shot so my ABS light is always on and doesn't work. You just get used to it I guess, since I never drive on ice/snow it doesn't matter anyways AND I can stop quicker (with less control) with ABS off.
    #11
  12. TenaciousD

    TenaciousD Founding Member

    Joined:
    Sep 15, 2001
    Messages:
    321
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Tampa,Fl
    I jut got a check to see if it was the module and it was, how ever they said depending on the part # ( they said there were2) it would be $350+ or $750+ depending on the part which thet wouldnt know till they took it off. that sounds WAY too high.
    im gonna call around a mom n pop place to see what they are charging.
    #12
  13. streetstang03

    streetstang03 unModerator

    Joined:
    Dec 27, 2003
    Messages:
    2,483
    Likes Received:
    1
    Trophy Points:
    0
    Location:
    the dark side of the moon/home of the 1999, 2003,
    you can find the abs module on ebay from $50-$100. then do it yourself, or have a shop do it. they all seem to charge out the ass for a new module.
    #13
  14. 96GTstang46

    96GTstang46 New Member

    Joined:
    Nov 20, 2006
    Messages:
    142
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Seattle, Washington
    This may sound dumb or someone might have said something already but I had my abs light turn on one day and i didnt know why..

    About a month later i was doing my brakes when i noticed that my abs line with CUT.. it was rubbin on my rim on the inside and wore all the way threw the line.. so i replaced it with one from the junk yard and has worked great sence. Maybe something to check out?!?!:shrug:
    #14
  15. TenaciousD

    TenaciousD Founding Member

    Joined:
    Sep 15, 2001
    Messages:
    321
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Tampa,Fl
    yeah i looked, nothing right now for my yr and i need to get the module w/ traction controll

    i found this place http://www.modulemaster.com/fordabsbsrepair.html that rebuild them for $100+ just need to find a place to take it out for a fair price. dont have my jack stands right now ;(
    #15
  16. Mustang5L5

    Mustang5L5 Car used in adult film "Highway Gangbang-InDaButt" SN Certified Technician Founding Member

    Joined:
    Feb 19, 2001
    Messages:
    21,625
    Likes Received:
    306
    Trophy Points:
    124
    Location:
    Massachusetts
    If the light is on, the ABS system is shut off by default. That's pretty much a rule with all cars really.





    Most common reason for the ABS light? The wheel sensors crap the bed. They just oxidize from the weather and fail. Too bad there is no easy way to read the codes. You can check the sensors by reading resistance of the sensors. An open reading is the bad sensor.

    I had a '93 Mark 8 that had the ability to ground the ABS test plug and the ABS light in the dash would BLINK you the codes. They you look it up on a chart and it would tell you the fault. When my ABS light came on in that car, i did just that and it told me the right rear sensor was not reading. I tested the sensor and sure as hell it was an open connection. I replaced it and the light went out next time i started the engine.

    Maybe if your light is on, first thing to do is check resistance of your 4 wheel sensors with a digital multimeter
    #16
  17. TenaciousD

    TenaciousD Founding Member

    Joined:
    Sep 15, 2001
    Messages:
    321
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Tampa,Fl
    well i just got the car back from having a new module put on but the traction controll still doesnt work! i bet they put the module in w/o traction, idiots.
    so tomorrow im bck down there. i was hoping i could just pull out the panel where the button is just to make sure its connected but when i was driving home the traction control was lit up, just not the orange part phen you press it off so im guess it is ;(
    #17
  18. marvizu

    marvizu Member

    Joined:
    Nov 20, 2000
    Messages:
    31
    Likes Received:
    0
    Trophy Points:
    6
    Location:
    Henderson, NV
    here's a little twist, when I drive my car for the first time each day, ABS light is off and Trac control button light is off. Every time at the same distance, both lights come on ( around 5 miles ). When I leave work, both lights are still on utill about the same distance, and then they turn off. What do you all think?
    #18
  19. StangYellow

    StangYellow Founding Member

    Joined:
    Sep 12, 2002
    Messages:
    1,061
    Likes Received:
    1
    Trophy Points:
    39
    Top 3 posts on this board are ABS posts......

    oh wait, thats because i replied to all 3.

    Still kind of strange that the topic is popular
    #19
  20. Mustang5L5

    Mustang5L5 Car used in adult film "Highway Gangbang-InDaButt" SN Certified Technician Founding Member

    Joined:
    Feb 19, 2001
    Messages:
    21,625
    Likes Received:
    306
    Trophy Points:
    124
    Location:
    Massachusetts
    ABS and TC both use the same system, so when ABS fails, so does TC


    Most common cause for ABS turning off after driving a short distance is faulty wheel sensors.

    Short of having the codes read and pinpointing which sensor it is, you can unplug each at the wheels (or whever the disconnect connector is) and read the resistance with an Digital multimeter. All 4 should read the same. If any reads open, or has a different value, there's your faulty sensor.
    #20

Share This Page