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How to reset the abs light

Brake with floor replace master cylinder abs light come on bleed brake light stll on

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  • Rick Krakora Nov 27, 2013

    Hi john trapp, I want to help you with your problem, but I need more information from you. Can you please add details in the comment box?
    What year, make/model of your vehicle??

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Usually when you bleed brakes you must disable abs by removing it's fuse from fuse box. Maybe it's still not in place and giving you the light. Not sure if it's related to that but it would be the first thing I would look into.

Posted on Jan 17, 2014

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Posted on Jan 02, 2017

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SOURCE: 97 Chevy Silverado Brake Problem

start bleding again from left to rigt all the way around.

Posted on Oct 09, 2009

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SOURCE: brake bleeding

if you didn't bleed the lines after putting the master in. then there is a good chance there is air in the lines now. may go through a quart of brake fluid before all the air is out. remember to start at r-rear/ l-rear/ r-front/ l-front last.will take some time. don't forget to adjust the rear brake while your there to help with the pedal

Posted on Aug 13, 2009

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SOURCE: Spongy brakes after bleeding them 2 times. Should I try to bleed the master cylinder or replace it?

Honestly your guess is as good as mine. But I don't think the master cylinder is NOT bad you still have air in the system. Get a big bottle of brake fluid bleed all four sides until you run out of fluid or your brakes work properly. You should divide the bottle's content in four, then use each quantity in each side. You'll be removing air and contaminated fluid from the system. Get a small hose that fits on the bleeders and an appropriate container. I have a good feeling if you do this your brakes will work just fine. I don't know how you are bleeding the brakes. I'll let you know the proper way just in case. This is a two man job, with the wheel off, have someone start the car. Have them pump the brakes a few times to get pressure. 1With the brake pedal UP open the bleeder, 2then have your assistant press the brake pedal all the way down and leave it completely pressed down. 3Close the bleeder valve, once close and only with the valve closed have'm release the brake. Repeat as necessary, bake depressed, open valve first then press brake. DO NOT depress until valve completly closed. Close valve THEN depress. Good Luck!

Posted on May 15, 2009

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2001 Buick LeSabre 3.8 L V6 Brake light came on checked reservoir it was empty. Added brake fluid, light didn't go off and brake pedal still was going all the way to the floor. Later found out the brake...


Since the fluid ran out, you'll have to manually bench bleed the master cylinder. Then try bleeding each wheel. If that doesn't work, you'll have to take it to a shop for a scan tool ABS auto bleed procedure.

Sep 27, 2017 | Buick Cars & Trucks

1 Answer

Abs brake system


Best case scenario bad vacuum pressure to the brake booster. Worst case bad abs control module or valve body/motor the abs system works by add and removing hydraulic pressure through valves and electric motor. Try using block off plugs at the master cylinder( remove lines plug outlets at master cylinder) check if brake pedal position and pressure is good(if there is no change problem is master cylinder or brake booster/ vacuum) if plugging at master cylinder solved issue repeat procedure at abs valve body after reinstalling lines from master cylinder if your problem returns your issue is in the abs valve body if plugging at the abs solves problem reconnect at the valve body bleed each line one by one testing between each line until you find the problem

Apr 11, 2014 | Hyundai Cars & Trucks

1 Answer

Rebuilt brake master cylinder brake go to floor


there is still air in the system. To bleed the brakes bleed out the m/cyl first by loosing off the lines at the cylinder v/ This primes the master cylinder first. Then starting at the longest line first bleed out the air finishing at the shortest line

Mar 08, 2014 | Mercury Sable Cars & Trucks

1 Answer

Brake pedal to floor


first did you perform a bench bleed on the master cylinder? if not bench bleed the master cylinder. had a neighbor with a similar problem with a ford truck. did some reaserch and found the ABS system needed to be bled. one way to bleed air out of it is to connect the diagnostic computer and perform an ABS bleed and then bleed the brakes like you normaly would. The other way was to take the vehicle somewhere you can slide around safely and slam on the brakes causing the ABS to activate. do this a few times and then perform the normal bleed method.

Jan 17, 2013 | 2006 Kia Sedona

2 Answers

Abs light is and so is brake light


Hi Kathy, I'm guessing that you mean you've replaced the brake master cylinder. It helps to be as specific as possible, so we can help you in a specific way. Make sure that the brake fluid pipes connecting the master cylinder are sealing correctly. There must be no leakage from them at all. Fill the reservoir and keep it filled throughout the whole bleeding procedure by having someone topping up each time the level goes down. Begin the bleeding procedure at the wheel furthest from the master cylinder and move one wheel at a time closer. The procedure is to push the pedal repeatedly to the floor and releasing to come full travel to the top of its movement. Repeat several times and while holding the pedal fully depressed to the floor open and close the bleeding valve on the wheel being bled before beginning the pumping action over. Once all wheels have been bled and you have reached the wheel closest to the master cylinder, if the pressure in the system is insufficient repeat the whole job until brake pedal pressure is normal. Look for signs of leakage on all four wheels in the event there is a leak on a wheel cylinder. The brake warning light should extinguish when the park brake is released and the ABS light when pressure is normal in the system, unless there is another separate fault. Finish up on the bleeding first and let me know how you get on. We'll tackle one job at a time. Regards John

Oct 14, 2012 | 1998 Chevrolet Blazer

2 Answers

My 1997 chevy 1500 z71 brakes suddenly going all the way to the floor. Checked brake fluid and it was low. Could be wheel cylinder? Master cylinder? or ?


well, check the brake lines for leakage after adding brake fluid to the full mark. If the brake pedal goes all the way to the floor, it's likely there is a leak somewhere after the master cylinder. If the pedal gets hard after adding fluid, and pumping it several times with the car off, then the master cylinder is still ok.

If air has gotten into the master cylinder, it may have to be bled out on a bench, or using a scanner if that's the way your vehicle is.

Bleeding the Brake System (ABS) Auto Bleed Procedure NOTE: Perform a manual bleeding procedure. If the brake pedal height and firmness results are not achieved, perform the auto bleed procedure below.
NOTE: Perform this procedure when replacing the brake pressure modulator valve or electro-hydraulic control unit.
  1. Perform the manual brake bleeding procedure. Refer to Bleeding the Brake System (non-ABS).
  2. Check the master cylinder fluid level often to prevent running the system dry.
  3. Press the brake pedal firmly and run the Scan Tool Automated Bleed Procedure (for Gas engines) once, or the Function Test (for Diesel engines) four times. Make sure to release the brake pedal between each test.
  4. Perform the manual bleed procedure again. This should remove the remaining air from the brake system.
  5. Bleed the system as many times as needed to obtain the appropriate feel of the brake pedal.

Dec 18, 2010 | 1997 Chevrolet K1500

1 Answer

Replaced master cylinder, front brake calipers and rear calipers,


BY TRUCK HAVING ABS BRAKE.YOU NEED A SCANNER TO BLEED BRAKES THE SCANNER HAS TO RESET OPERATION OF THE BRAKE HYDRALIC SYTEM BEFORE YOU CAN BLEED SYSTEM.

Jul 13, 2010 | 2005 Ford F 350 Super Duty

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