Question about 1998 Dodge Ram 1500 4WD

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My abs and brake light are on all the time we have replace the master brake unit but they are still on watt can that bi

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  • Dodge Master
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Check the rear abs sensor which is mounted on the rear axle housing ( differentail ) if there is one.

Posted on May 27, 2010

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99 caravan 3.3 no abs brakes. I have replaced a bad master cylinder and all 4 rusted brake lines. The ABS brake warning light is not on. The van does not pull to one side.


Something is wrong with your statement
it is a 99 caravan 3.3 no abs , then you are on about abs light pump etc
the abs pump only works when the master cylinder is under pressure and that pressure is suddenly reduced by the sensor reading a locked wheel and a valve is opened to release line pressure to that wheel As soon as that wheel starts to turn, the valve closes
while the wheel is stopped and that valve is open , the abs pump kicks in to maintain line pressure otherwise the brake pedal would go to the floor
master cylinders work through a. abs unit and not because of it so if the master cylinder becomes faulty, the abs pump will not operate until a wheel stops turning as there is no line pressure to stop a wheel turning
the abs light may not be on because there is nothing to operate the system to put it on

Apr 30, 2016 | Cars & Trucks

2 Answers

Replace two front calipers bleed the brakes but pedal still goes to the floor


If you ABS. You may have to put a scanner on it to bleed the ABS system. If you don't, look at replacing the master cylinder.

Jun 13, 2015 | 2007 Scion tC

1 Answer

What could be the problem when I aply brakes pedal gets real hard where car wont stop when braking coming to a stop brk. light and abs lights on


Hey Joes, 1 problem at a time ,if brake light is coming on that is in the proportion valve ,did you have to push reset button to make light go out,? if the ABS lite is coming on what you can do to check and see if that is the problem is unplug it and try brakes ,it will deactivate ABS and give you normal braking and ABS light will be on ,see if symptyms change , also did you reset ABS sensors to the tone wheel when you replaced rotors ? I don't know what you have and I have seen some cars need a importaint reset procedure for abs to work properly. good luck I hope I gave you some good things to look at that help you.
Woody

Oct 28, 2014 | Cars & Trucks

1 Answer

Spongy brake pedal 1998 Ford Windstar


The ABS is a different computer and there is nothing for the Master cylinder. Some scanners need added programming to read the ABS circuit.

Feb 03, 2013 | 1998 Ford Windstar

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

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

2 Answers

94 s-10 blazer abs


Look under the hood where the ABS unit sits.(on drivers side)

Make sure the engine is NOT Running and the key is OFF. Also check that the parking brake is Not Engaged at this time.

First unplug the two wire connector on the ABS unit. IIRC the wire colors for this connector are Red and Black, and they are of a fairly thick gauge.

The ABS/Brake light will remain on at this time if you start the motor, so skip that and look for a second connector on the ABS unit. This one has multiple wires and are much thinner gauge than the first connector. **Unplug this connector. With key OFF, pump the brake pedal 10-15 times. Start the motor and there should be no ABS or Brake lights illuminated on the dash.

You just completely eliminated the ABS Unit from your braking system and will only have NON- ABS power brakes from now on. The ABS unit will only act as an extended brake fluid reservoir and will not influence braking an any way...you will have to pump the brakes yourself if needed.

On my personal vehicle...also a '94 S10, I went one step further and fabricated an ABS pump elimination kit that allowed me to physically remove the entire unit and tie the lines back into the system using a simple valve found on many domestic master cylinders. I may fab up some kits if there is any interest, but it's really not needed...I'm just anal about my vehicles.

**NOTE: Some GM ABS units have two additional plugs besides the two wire connector, if so just unplug them both.

Jul 25, 2009 | 1994 Chevrolet S-10 Blazer

2 Answers

Brake pedal goes to floor after bleeding the brakes many times


start off by pumping the peddle 25 times with engine off ... bleed the abs system (usually has bleeder valves near/on control unit). then bleed the rest as usual with engine off ... DO NOT turn the key on while bleeding abs brakes.

Mar 18, 2009 | 2000 Dodge Caravan

2 Answers

1994 Cavalier -replaced master cylinder-no pressure to rear brake


The most common bleeding procedure is to bleed the ABS brake furthest from the master cylinder first, then bleed the other brake that shares the same hydraulic circuit (which may be the other rear brake on a rear-wheel drive car, or the opposite front brake on a front-wheel drive car or minivan). After these have been bled, you then bleed the other brake circuit starting with the furthest brake from the master cylinder.
Air can be very difficult to remove from an ABS modulator assembly because of all the nooks and crannies inside the unit. The modulator may have eight to 10, or more, ABS/traction control solenoid valves, plus various check valves and dead-end ports. Some ABS modulators have special bleed screws to help you vent the trapped air when bleeding the system. Others do not and require the use of a scan tool to cycle the ABS solenoids while you bleed the system. 1. To bleed the isolation valves in the modulator, there are two bleeder screws. Start with the one toward the engine. Turn the ignition on and apply light pressure on the brake pedal. Open the bleeder screw and allow the fluid to flow until clear. Close the screw and do the same at the second bleeder screw. 2. Depressurize the accumulator by pumping the pedal 40 times with the key off. Wait about two minutes for the brake fluid to de-aerate, then refill the fluid reservoir with DOT 3 brake fluid. 3. Now you can bleed the boost section. This is done by applying moderate pressure on the brake pedal and turning the ignition on for three seconds, then off. Repeat this a total of 10 times. Make sure the pedal feels firm when you have finished, and give the car a road test to make sure the brakes are working properly.

Mar 15, 2009 | 1994 Chevrolet Cavalier

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