Question about 2000 Ford Windstar

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Abs light stays on and no braking power

You told me to change the master cylinder would this also cause them to grind and skip when I stop

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No this will not cure any grinding, I would be looking ar the pads and / or shoes, rotors and / or drums, If they are fine then check your wheel bearings.

Posted on Oct 30, 2008

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WHY DOES MY ABS AND BRAKE LIGHTS STAY ON?


brake and abs light check brake fluid level. The round float in the master cylinder directly controls the 2 dash lights.
The light is NOT directly controlled by the master cylinder float. The light is controlled by the ABS Module, which location depends on your vehicle. There are a number of different reasons the lights come on. If it comes on but shuts back off within seconds, don't worry about it, that occasionally happens when it gets a bad signal ("nonlatching error"). In rear-wheel-drive (RWD) vehicles, it is common for the differential speed sensor in the rear differential to go bad. You can pick up a Haynes manual to find if you can do at-home diagnostics (Temporarily grounding out the diagnostic lead will cause the ABS light to flash out a pattern indicating the error)


Check the Brake Pressure switch ( also known as SPEED CONTROL DEACTIVATION SWITCH ) which is located below the Brake fluid master cylinder for leakage. The leakage can cause both lights to stay on and also cruise control control not working

Sep 22, 2014 | 1998 Dodge Ram 1500 4WD

1 Answer

1999 corolla, brake pedal goes to the floor. how can we fix the brakes?


is the abs light on?the abs system only effects the pedal when you are stopping quickly to activate the system. you still have a hydrualic brake pressure problem. are the rear brakes shoes or pads? rear shoes out of adjustment can cause a low brake pedal.even though the master cylinder has been replaced doesn't mean you got a good part.if the part was a remanufactered part very likely it is bad. to determine if it is the master cylinder, plug off the lines from the side off the master cylinder and hit the brake pedal. if the pedal stays up look for a problem elsewhere in the system. if the pedal drops the the master cylinder is defective.

Jun 11, 2012 | Toyota Corolla Cars & Trucks

3 Answers

THE ABS LIGHT STAYS ON


HAVE CAR ABS BRAKES CODE SCAN.BECAUSE WHEN ABS LIGHT IS ON.YOUR CAR ABS BRAKES NOT WORKING.CHECK ABS BRAKES FUSE AND RELAYS.IF ALL IS GOOD.HAVE DEALERSHIP OR GARAGE CHECK ABS BRAKE SYSTEM BECAUSE ABS BRAKE UNIT IS PART OF THE BRAKE MASTER CYLINDER IF KEEP DRIVING COULD END UP WITH BRAKE FAILURE.CAR NOT SAFE TO DRIVE WHEN ABS OR ANY WARNING BRAKE LIGHT APPEARS.

May 04, 2011 | 1994 Chevrolet Cavalier

1 Answer

The ABS light stays lit on my 2000 Subaru Forester. I have replaced front disc pads and rear shoes (drum brakes) appear to be in good shape. Master cylinder is ok and there are no fluid leaks anywhere....


ABS is anti lock braking system,which helps to stop car in various conditions.Wet/slippery etc
Sensors are located on all brakes
You need to go to your local auto electrician who will plug in scanner to locate fault

Jul 19, 2010 | 2000 Subaru Forester

1 Answer

ABS light stays on sounds like a abs pump is staying on. Is there a pump for the abs system?


There is no seperate pump. The following lines will give you more details

Braking force and the tendency of the wheels to lock up are affected by a combination of factors such as the friction coefficient of the road surface, and the difference between the vehicle speed and the road wheel speed. The ABS prevents the road wheels from locking up during heavy braking by controlling the vehicle's brake system hydraulic pressure.
During normal braking, as the rotational speed of the wheel falls, no electric current flows from the ECU to the hydraulic unit. The solenoid valve is not energized. The brake master cylinder hydraulic pressure is applied to the brake unit, and the ABS is not involved. However, even though the ABS is passive during normal braking, its control module is constantly monitoring for rapid deceleration of any of the wheels.
If a wheel-speed sensor signals severe wheel deceleration - which means the wheel is likely to lock up - the ECU sends a current to the hydraulic unit. This energizes the solenoid valve. The action of the valve isolates the brake circuit from the master cylinder. This stops the braking pressure at that wheel from rising, and keeps it constant.
If the sensors signal the wheel is still decelerating too rapidly, the ECU sends a larger current to the hydraulic unit. The armature moves even further and opens the valve. It opens a passage from the brake circuit. Brake fluid is sent from the brake circuit back to the master cylinder. Pressure in the brake caliper circuit is reduced so that the wheel is braked less heavily.
If the wheel sensors indicate that lowering the brake pressure is letting the wheel accelerate again, the ECU stops sending current to the hydraulic unit and de-energizes the solenoid valve. This lets the pressure increase, so that the wheel is again decelerated.
This cycle repeats itself about four to six times per second.
It is normal in an ABS for the valves in the hydraulic control unit to keep changing position as they change the brake pressure that’s being applied. These changes in position may cause rapid pulsations to be felt through the brake pedal.

Jun 06, 2010 | 2003 Chevrolet Silverado 1500

1 Answer

Soft brake pedal


yes brakes need to bleed again starting with the caliper farthest from master cylinder abs pump is fine

May 27, 2009 | 1993 Volvo 940

1 Answer

Abs light wont go out


When u power up the vehicle ABS does a self test(light stays on a few seconds then cuts off) and if it see's a problem will shut off and illuminate the ABS lamp. It will also do a second test on iself when you reach a speed of around 12-15 mph,it will run the pump for a few seconds to check pressure and look at the speed sensors,if it see a problem here it will again shut down and illuminate the ABS light.
Now if the red brake lamp is on then it will shut down because it thinks you have a hydraulic concern and will not try and run ABS if this is the case.
If red brake lamp is on most likely if you have good brakes it is a problem with the float sensor in the master cylinder reservior,maybe its bad or just stuck,or just low on fluid.

Feb 12, 2009 | 1992 Ford F250

1 Answer

Abs brake light and no stopping power


You need to replace your master cylinder. I have seen this numerous times.good luck and remember to rate all of the solutions you get.

Oct 27, 2008 | 1999 Ford Windstar

1 Answer

Abs light stays on and no braking power


have you checked the master cylinder ? As this will cause the ABS lite to come on if it s bypassing inide. hope this helps as I have seen it many times. Good luck and remember to rate all solutions you get. Thanx
P.S. If you change the master cylinder remember to bench bleed it and be sure to transfer the rubber " O " ring from the old one to the new one ( located on the back side o the master cylinder ). Or you will have lots ofpedal and no stopping ower.

Oct 27, 2008 | 1999 Ford Windstar

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