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Anonymous Posted on Apr 19, 2009

Abs light is on

The ABS light, the brakes, and the traction control light are on. A mechanic ran a scan and it read the motors are bad. Where are the motors located in your ABS system? How hard is this for me to change?

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Harvey N Tawatao

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  • Pontiac Master 3,854 Answers
  • Posted on Apr 19, 2009
Harvey N Tawatao
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Joined: Apr 05, 2009
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Locate and pull the ABS pump fuse located in the power distribution center under the hood and CHECK IT TO SEE IF THE FUSE IS BAD. Basically you are looking for a fuse box with large amperage fuses and some relays. Look along the fender well in the engine compartment relatively close to the battery. It is a 60 amp fuse in most instances and should be clearly labeled "ABS" in the large fuse box with other similarly oversize fuses used for other high power subsystems. 
 All ABS systems are designed so that the solenoid valves in the ABS brake manifold are in safety "bypass" mode when powered down or when the ABS control module has been removed. You will have standard everyday power brakes no different than brakes built without the ABS system.

The ABS system will perform a self check once you exceed 5 MPH and the "ABS" and "brake" lamps should turn off. During this test, the controller runs the pump motor and briefly operates all of the valves. This ABS "self-test" is performed every time you start and drive.

EBCM is short for "Electronic Brake Control Module" It is the advanced computer than controls the electric motor pump and valves of your ABS system.  Burnout of the motor is very rare however. A MOSFET transistor in the EBCM (Electronic Brake Control Module) has failed, can cause the pump not to perform.

Pump motors generally do not fail, but when they do, the culprit is usually worn-out brushes or corroded electrical connections. In a worst-case scenario, your motor is beyond repair. It is bolted directly to the hydraulic assembly- a cast aluminum brake fluid distribution hub with 5 or 6 brake lines branching off of it and wiring harness.

I hope this helps before you get your hands to dirty. In short check all the electrical connections first. Try running a hot wire to the pump motor first to see if it runs and if it does, then it's not the motor and could be a easier fix by changing the (EBCM).

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Related Questions:

0helpful
2answers

If my traction control light comes on while driving and the car starts jerking then pull over and shut the car off the light goes out you start the car up and you start driving and it dose the same thing...

If the traction control light comes on while you are driving and the car starts jerking, it is important to pull over and shut the car off as soon as it is safe to do so. This is because the traction control system is designed to help improve the stability and handling of your vehicle, and if it is not functioning properly, it can affect the safety of your vehicle.
It is possible that the issue could be related to the ABS (Anti-lock Brake System) sensors. The ABS sensors are responsible for monitoring the speed of the wheels and sending this information to the ABS system. If the sensors are not functioning properly, it can cause the traction control system to malfunction, which could result in the symptoms you have described.
It is important to have the issue diagnosed and repaired as soon as possible by a qualified mechanic. They will be able to determine the root cause of the problem and recommend the necessary repairs to get your vehicle back on the road safely.
0helpful
1answer

ABS light and traction light and no cruise control

how on earth would the blind know what is wrong.?
scan it? yet?
btw, newer cars cut cruise feature for any signs of danger.
new laws...
the traction needs ABS to work ,so forget that and fix ABS.
ABS needs 2 things to work , brakes and ABS.

so if brakes are bad, then ABS will get upset.
after all, if it cant brake right, how can the puter save you?
if brakes are known to be ok (inspections work here)
but in this case it was BREACHED by you, with out reading the book first.
then scan the ABS. (omg? code for dead sensor?) nah, you caused it..
easy

ABS resets every key on. so...
my guess, if ABS was happy before your actions( you never said)
then you got air in to the system. and failed to follow the FSM instructions on bleeding brakes, in ABS car.

front caliper, did you block the hose with cap, so it didn't allow air to the modulator? oops... never just let them drip... or . max pain.
bleed it again, (using any or all 5 ways to do so, bleeding is skill thing) (many modulators can not just be simply bled)

now Ill quote the 2012 fSM for you , under brakes

Data: -----------------------------------------------------------------
ABS Brake Bleeding
STANDARD PROCEDURE - ABS BRAKE BLEEDING

ABS system bleeding requires conventional bleeding methods plus use of a scan tool. The procedure involves performing a base brake bleeding, followed by use of the scan tool to cycle and bleed the HCU pump and solenoids. A second base brake bleeding procedure is then required to remove any air remaining in the system.

Perform base brake bleeding, (Refer to Brakes - Standard Procedure)(Refer To List 1).

Connect scan tool to the Data Link Connector.

Select ANTILOCK BRAKES, followed by MISCELLANEOUS, then ABS BRAKES. Follow the instructions displayed. When scan tool displays TEST COMPLETE, disconnect scan tool and proceed.

Perform base brake bleeding a second time, (Refer to Brakes - Standard Procedure)(Refer To List 1).

Top off master cylinder fluid level and verify proper brake operation before moving vehicle.
0helpful
2answers

My ABS and traction lights are on. Since they have been on the cruise control does not work. What is the problem?

sounds like vacuum line leak but that depends on vehicle may also be a pressure line problem for ABS, check all fuses too
0helpful
1answer

Traction control night and brake light on 2008 trailblazer

First, check to see if your ABS and your TCS fuses are good. A lot of times, if both lights come on, it senses a failure in the braking system. Your vehicle will disable the abs if it finds a problem in the braking system, hence the red brake light/hand brake light coming on in the dash. Get a code scanner that also reads the abs module. You could have a bad wheel sensor, which is tied to your TCS and your ABS system. Either that, or you ABS module could be bad.
0helpful
1answer

2001 Monte carlo tract control light is always on and so is abs light always on...brakes are good rotors are good. is there a reset button?

The ABS light has nothing to do with the condition of the brakes. The ABS is is own system that relies on the braking system in order to function. If the ABS light is on there there is a fault in the ABS system. This will also turn off the traction control since the traction control uses the ABS system.

The best start is to have the ABS system scanned for trouble codes. This will give you a clear direction in which to start finding a solution. This will need to be done with either an ABS specific scan tool or a high end multi-function scan tool. You can also try your local auto parts store to see if they can do this for you.

Once you know what the codes are than you can start figuring out what to do to fix it.

Some common failures on these are bad wheel/hub bearings, bad speed sensors, broken speed sensor wiring harnes.

Post the codes and I'll be happy to help you further.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

10helpful
1answer

ABS LIGHT AND TRACTION CONTROL LIGHT STAYS ON

ABS = Anti-lock Brake System.
TC = Traction Control System (Engine Control Module).
If the ABS lights on the dashboard permanently the ABS system is faulty. You must access the ABS & TC Electronic Control Units (ECU) memory for pull out all DTC (Diagnostic Trouble Codes), using diagnostic equipment connected to the data link connector of the car. Then you will be full informed about bad pieces (e.g.: front right wheel abs sensor interrupted, ...). After bad pieces replacement you will be able to erase all faults memored by ABS ECU, in other words reset the ABS system and turn off the warning lamp on dashboard.

I suspect bad brake pedal switch, but you should scan the ABS & TC ECU's.

2helpful
1answer

Traction control light on ,brake light on ,abs light on

If the brake light is on, check the fluid level immediately and add fluid if necessary.
After that, have the car's OBD-II computer scanned with a 'Brake Scan' tool for OBD-II. This will help to narrow down which wheel speed sensor is giving you trouble. It might be a broken wire, or a bad wheel speed sensor.

The wheel speed sensor sends information to the ABS side and the Traction Control side of the computer module for ABS and Traction Control.

The car will revert to standard braking and regular non braking transmission power distribution to the drive wheels when the ABS and Traction Control lights are both on.

Good luck on this repair.
3helpful
1answer

2001 jaguar s type. Traction controll fault light came on. 5 minutes later brake light comes on and at the same time abs light comes on. What could my problem be?

your traction control mechanism uses the abs breaks to slow the spinning and give you better traction. i'm thinking your traction control sensor has gone bad
0helpful
1answer

ABS TURN LIGHTS COME ON

need to get abs codes read. it will tell you what wheel to look at.
1.bad wheel bearing, sensor is part of bearing.
2.broken wires to sensor.
3.traction control part of abs
3helpful
3answers

Where is the abs control module located on a 02 chevy avalanche ?

THE EBCM IS BAD this is the electronic control module that is on abs pump. you can replace seperate I think it is around 500 for part
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