Question about 2003 Ford F250 Super Duty Crew Cab

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F250 SD anti lock brakes

2003 F250 SD Anti lock brake light. Had truck scanned was told the rear wheel sensor was problem. Replaced sensor, now light comes on without vehicle moving.Prior to the replacement the light would stay off for 1/2 mile or more. Any suggestions? Thanks!

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Try taking wheels off and power washing the whole brake area. i had a similiar problem and doing solved the problem.make sure you do all 4 of them because scanning is not great. if this helps please rate. joe

Posted on Nov 23, 2008

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1 Answer

Abs light on , replaced calipers , master cylinder , pads , brakes still drag . So replaced master cylinder again , and again , and again . Now I have no brakes . Oh re did pads also again and again


The ABS system utilizes Sensors at the wheels, some form of modulator (the can release each wheel's brake individually) and a control module (could be part of the car's ECU).
If you're just replacing parts randomly, you will drop a lot of money and time and probably won't cure the actual issue.
Anti lock braking system
How Anti Lock Brakes Work HowStuffWorks

Feb 25, 2015 | 1999 Chevrolet S-10

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I have a 2002 Lincoln ls . How do I replace the abs speed sensor? Right front tire?


you have one on the inside of each wheel.
SECTION 206-09A: Anti-Lock Control 2002 Lincoln LS Workshop Manual
REMOVAL AND INSTALLATION Front Wheel Speed Sensor
Material Item Specification RTV Silicone Sealant
FSTZ-19G204-AB (Canada CXC-114A) NAVSTR Sealer
Removal and Installation
  1. Raise and support the vehicle. For additional information, refer to Section 100-02 .
  1. Position the inner splash shield aside.
    1. Remove the pin-type retainers.
    1. Position the inner splash shield aside.
  1. Disconnect the anti-lock brake sensor electrical connector.
  1. Remove the anti-lock brake sensor harness from the brake hose clips.
  1. Remove the anti-lock brake sensor.
    1. Remove the anti-lock brake sensor clip.
    1. Remove the anti-lock brake sensor.
  1. NOTE: Make sure the anti-lock brake sensor is fully seated before installation of the new clip.
    To install, reverse the removal procedure.
    • Apply a 2.5 mm (0.1 in) bead of silicone sealant to the outside diameter of the anti-lock brake sensor.
-------------------------------------------------------------------------
Rear Wheel Speed Sensor Removal and Installation
  1. Raise and support the vehicle. For additional information, refer to Section 100-02 .
  1. Disconnect the rear anti-lock brake sensor electrical connector.
  1. Remove the rear anti-lock brake sensor harness from the control arm clips.
  1. NOTE: Clean off dirt and foreign material that may have collected around the rear anti-lock brake sensor before removal.
    Remove the rear anti-lock brake sensor.
    1. Remove the anti-lock brake sensor bolt.
    1. Remove the anti-lock brake sensor.
  1. To install, reverse the removal procedure.

Feb 24, 2010 | 2001 Lincoln LS

1 Answer

2001 Alero - anti-lock brake light warning light won't go out - had brakes replaced - is there a re-set button?


no reset button.have the car anti-lock brake system scanned.to check code.because when anti - lock brake light come on.it can be many things.like faulty wheel sensor.faulty relay or the anti - brake unit low on brake fluid or the abs unit faulty.

Nov 28, 2009 | 1999 Oldsmobile Alero

1 Answer

I'm replacing the left front brake hose and need to know if I have 4 wheel or 2 wheel anti lock brakes..


if you have anti lock brakes ususlly there all anti lock but to be sure look at the brakes there should be a sensor at each wheel.

Jul 06, 2009 | 2002 Ford F250 Super Duty SuperCab

1 Answer

ABS brake module sounds like a motor running and won't stop unless battery is disconnected. what is fix?


I would pull the fuse for the ABS hydraulic pump and then put it back in and see what happens. Don't ever recall a pump running. Dealer may need to hook up scan tool for diagnostic fault codes, DTCs.



Principles of Operation
The ABS control module receives wheel speed readings from both front wheel speed sensors and the rear differential speed sensor, and processes this information to determine if an ABS event is necessary. The wheel speed sensor electrically senses each tooth of the ABS sensor indicators as it passes through the wheel speed sensor's magnetic field.
The ABS control module continuously monitors and compares the rotational speed of each wheel speed sensor indicator and, when it detects an impending wheel lock, modulates brake pressure to the appropriate brake caliper(s). This is accomplished by triggering the hydraulic control unit (HCU) to open and close the appropriate solenoid valves. Once the affected wheel returns to normal speed, the ABS control module returns the solenoid valves to their normal position, and normal (base) braking resumes.
The ABS control module is self-monitoring. When the ignition switch is turned to the RUN position, the ABS control module will do a preliminary electrical check, and at approximately 20 km/h (12 mph), the pump motor is turned on for approximately one-half second. Any malfunction of the ABS system will cause the ABS to shut off; normal power assisted braking, however, remains.
Inspection and Verification — Scan Tool Communications Check
  1. Verify the customer concern by carrying out the Drive Cycle Test.
  1. Visually inspect for obvious signs of mechanical and electrical damage.


Visual Inspection Chart Mechanical Electrical
  • Parking brake cable
  • Tire pressure
  • Tire size or mismatched tires
  • Blown fuse
  • Central junction box (CJB):
    • fuse 23 (10A)
  • Battery junction box
    • fuse 102 (50A)
  • Connectors or connections
  • Ground integrity
  • Harness routing
  • Wire chafing
  • Circuitry open/shorted

-----------------------------------------------------------------------
Anti-Lock Control The four-wheel anti-lock brake system (4WABS) consists of the following components:
  • Anti-lock brake control module (2C265)
  • Front anti-lock brake sensor (2C204)
  • Front anti-lock brake sensor indicator (2C182)
  • Hydraulic control unit (2C219)
  • Rear anti-lock brake sensor (2C190)
  • Rear anti-lock brake sensor indicator (2C189)
  • Yellow ABS warning indicator

May 07, 2009 | 2000 Ford Expedition

1 Answer

What does the anti lock light on the dash mean?


The anti-lock light is indicating that your anti-lock brake system has a problem. Check fluid level. Could be a sensor, time for brake service etc, but I wouldn't wait too long to have it checked, just in case something serious. Anti-lock brake problems may cause a wheel or more, or all, to lock up in a panic stop situation. When was last service on brakes done?

Apr 25, 2009 | 1997 Chevrolet Lumina

1 Answer

Problem with my cruise control and ABS light on 03 Explorer


Anti-Lock Control —Vehicles Built After 03/2002 The 3-channel anti-lock brake system consists of the following components:
  • front wheel speed sensors
  • front wheel speed sensor rings
  • hydraulic control unit (HCU)
  • Anti-lock brake control module (ECU)
  • rear wheel speed sensor
  • rear wheel speed sensor rings
  • yellow anti-lock brake warning indicator
The 4-channel anti-lock brake system with traction control and stability assist system consists of the following components:
  • active brake booster with integral solenoid
  • brake booster release switch
  • front wheel speed sensors
  • front wheel speed sensor rings
  • hydraulic control unit (HCU)
  • stability assist module (ECU)
  • stability assist event indicator
  • lateral accelerometer
  • longitudinal accelerometer (4x4)
  • rear wheel speed sensors
  • rear wheel speed sensor rings
  • steering wheel position sensor
  • yaw rate sensor
  • yellow anti-lock brake warning indicator
  • brake pressure transducer
  • traction control switch
---------------------------------------------------------------------
I suspect the abs issue is causing the speed control not to work if it happened at the same time the cruise control stopped working. When the yellow ABS light comes on, it means the ABS is dactivated. You may have a faulty accelerometer which senses acceleration and yaw (side to side lean). I have not seen a bad one but you said it is sensitive to acceleration.
I would unplug it and see what happens. The connector should have a small tab to depress so you can pull the connector out.
Here is where it is:

Accelerometer Removal and Installation
  1. NOTE: The accelerometer is located under the center, rear passenger seat carpet. (I think you have to remove seat for access).
    Cut the carpeting along the perforations.
  1. Disconnect the electrical connector.
  1. Remove the nuts and remove the accelerometer.
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Have dealer hook up tester and pull fault codes if you can't find an easy solution.
Some background info
  • A malfunction in the anti-lock brake system will cause the anti-lock brake control module to shut off or inhibit the system. However, normal power-assisted braking remains.
  • Malfunctions are indicated by the yellow ABS warning indicator in the instrument cluster.
  • The anti-lock brake system is self-monitoring. When the ignition switch is turned to the RUN position, the anti-lock brake control module will carry out a preliminary self-check on the anti-lock electrical system indicated by a three-second illumination of the yellow ABS warning indicator in the instrument cluster.
  • During vehicle operation, including normal and anti-lock braking, the anti-lock brake control module monitors all electrical anti-lock functions and some hydraulic operations.
  • Each time the vehicle is driven, as soon as vehicle speed reaches approximately 20 km/h (12mph), the anti-lock brake control module turns on the pump motor for approximately one-half second. At this time, a mechanical noise may be heard. This is a normal function of the self-check by the anti-lock brake control module.
  • Pedal pulsation coupled with noise while braking on loose gravel, bumps, wet or snowy roads is normal and indicates correct functioning of the anti-lock brake system.
  • Warning Lamp Indicator
    The anti-lock brake system (ABS) uses the yellow ABS warning indicator to alert the driver of a malfunctions in the ABS.
    The yellow ABS warning indicator will come on to warn the driver that the ABS has been turned off due to a symptom that exists in the ABS. Normal power assist braking remains but wheels can lock during a panic stop while the yellow ABS warning indicator is illuminated.

    -----------------------------------------
    Please report back, I am curious if that is what it is. Good luck

    Mar 03, 2009 | 2003 Ford Explorer

    1 Answer

    Speedometer


    check for a connector not fully seated.

    here's info

    Vehicle Speed Sensor (VSS)
    On vehicles equipped with 4-wheel anti-lock brake systems (4WABS), the vehicle speed signal is generated by the rear anti-lock brake sensor and sent to the 4WABS module. The 4WABS module sends the vehicle speed signal via circuit 679 (GY/BK) to all systems that require a vehicle speed signal input. Vehicles equipped with rear anti-lock brakes (RABS) generate a vehicle speed signal from the rear axle speed sensor. The generic electronic module (GEM) receives this signal (VSS_GEM) for internal use and then distributes it to the appropriate other users (i.e., the powertrain control module [PCM], speed control module, and speedometer).
    Speedometer
    The electronic speedometer (17255) receives a speed signal from the 4WABS module (if equipped with 4WABS) or the generic electronic module (GEM)/central timer module (CTM) (if equipped with RABS). RABS = Rear antilock brake system

    Jan 17, 2009 | 2000 Ford F250 Super Duty Crew Cabs

    2 Answers

    Anti lock brake light


    abs relay some times go bad

    Dec 05, 2008 | 1999 Oldsmobile Alero

    1 Answer

    2003 Ranger FX-II ABS light on


    This isn't hard to do at all really and should be easy to procure the part from the local parts store. There is only one little screw holding it in

    102969669

    1. Raise and support vehicle.

    2. NOTE: Clean off dirt and foreign material that may have collected around the rear anti-lock brake sensor before removal. Remove the rear anti-lock brake sensor.
    1 Disconnect the rear anti-lock brake sensor electrical connector. 2 Remove the bolt. 3 Remove the rear anti-lock brake sensor.
    1. NOTE: Thoroughly clean the mounting surface. NOTE: Inspect the anti-lock brake sensor O-ring for damage; lightly lubricate the O-ring with axle lubricant. To install, reverse the removal procedure

    Nov 05, 2008 | 2003 Ford Ranger Regular Cab

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