Question about 2001 Ford Focus

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Ford puma abs and traction warning lights

Hi, I have a ford puma and a couple of days ago i noticed that when i brake from high speed the steering wheel shakes. then this morning the abs and brake traction warning lights came on, any idea what the problem might be and how much it could possibly cost?

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Disconect the batteri over night, or take the dash speedo out and put a screwdriver through the abs bulb

Posted on Jul 22, 2011

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The first thing i would do is check the wiring on all four wheels.It could be a faulty solenoid.The next thing is a diagnostic check.

Posted on Jan 19, 2010

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Light abs traction control stays 1998 buick park avenue


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2009 Ford Focus Zetec, 1.8 diesal. ABS warning light,Steering Failure Assist light and Battery light all on. Can't steer car. Then takes twenty minutes to restart car. Any ideas?

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About a week ago, having switched on and set off, all the brake warning lights stayed on, that is the ABS, TCS, TCS OFF and Brake System Warning lights. The brakes continued to work OK with no extra travel...


abs=anti-lock brake system/ tcs=traction control system ==sounds like you have a problem with ur abs possible bad sensor or a wiring connection problem when abs shuts down [trouble light] your brakes will work normal but if u stomp or brake hard the brakes will lock up skid and the tcs doesnt affect brakes but if u accelerate hard tires will spin lose traction check the wiring and connections to the sensors sometimes debris hits the wire and loosens the connection if looks ok and light is on have car scanned for the trouble code most auto stores such as auto zone/advanced auto offer this service for free the code will what and where the problem is so repair can be made

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Electrical malfunctions in 2006 GMC Envoy XL


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Brake sensor? something else?


You have a faulty wheel speed sensor. This is a magnetic pick up sensor on your wheel bearing hub and it controls your abs. If the car can not sense all 4 wheels then the abs will default back to normal brakes and your traction control will not work. Look at your wheel bearing hubs and check for these sensors. They are on the underside of the car and are black plastic with a wire comming out of it. A piece of gravel may have broken the pick up or the wires to a sensor may be broken as well. To replace it is usually a couple of screws on the hub assembly and a plug to disconnect from your wire harness.

May 27, 2009 | 2003 Mazda Mazda6

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.

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

    Mar 03, 2009 | 2003 Ford Explorer

    1 Answer

    Warning lights


    You need to have your brakes inspected by a professional. The lights indicate that ABS and traction control are not working...although brakes will work without these features, a humming noise can indicate more problems to come.

    Jul 09, 2008 | 2001 Ford Focus

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