Question about 2000 Chevrolet Blazer

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My ABS light is on and I had it checked and they said it must be something with the control unit or module, but before the light came on the blazer sometimes acted like it was not going to stop, what could the problem be?

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Hmm ok this is a tough one.. Its more than likely one of two things..

1.) the abs sensor.. this will account for the light being on and it will also account for the brake not working propperly.. to verify this,, Locate and remove the abs fuse.. Its in the fuse panel under the hood.,, under the cover is a diagram with the fuse layout.. remove the abs fuse and drive with the vehicle.. If your brake works perfectly then you need to change the abs sensor,,

2.) the second is the bran box / the ECU (control unit) ,, to verify this you will need to have a diagnostic machine (code reader) connect to the module and detect all the fault codes.. This is not likely but very possible.. Verify the sensor first and then check the control unit..

Now take into consideration that is the abs is not working propperly and you remove the fuse ,, YOUR BRAKE WILL WORK!!!! just the abs system wont,, you can drive your car safely without the abs,, it will just like driving a car with no abs or before they invented it.. what the abs does is hold and release quickly so you dont get an abrupt stop,, with the abs you will stop quicker so it will take a bit getting used to so you wont step on the pedal hard,,

Posted on Apr 23, 2010

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Abs problems are hard to pin point with out troubleshooting the whole system. Be sure the fluid is full, check all wiring to the mod. and the sensors. If it did not want to stop make sure of and vacuum hoses to the booster. The module can be found in salvage yards now and will not cost to much if you shop around. Most problems I have seen have been the ECU being bad, you have to look at the epoxy sealing to the plastic, if you see a gap water gets in and shorts out the electronics.

Posted on Apr 23, 2010

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Looking hard core for a diagram or a how to with regard to vaccume hose's for 2000 chevy blazer 4WD


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henry19702000@yahoo.com

Posted on Mar 10, 2011

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1 Answer

2001 blazer chevy


The ABS light is on, because you have no speed signal. The transmission is not shifting for the same reason. The core of your problem is the speed signal. I would first check the speed sensor wires again. One of them may be broken. If not, then you may have popped the ECM (Vehicle Eletronic Control Module). Good luck.

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Airbag warning


Whenever this warning light or any other stays on in the dash it is indicating that the systems control module (or the system sensor in the case of lights like low oil pressure, door open indicators etc.) has detected a fault, it then disables the system (this applies to ABS,TCS, TCM, SRS, TPMS and BCM faults and others) as long as the light is on. You must now have the dealer hook up a special electronic diagnostic tool and "scan" the system for the fault code that is stored for the problem(s)

Legend of Abbreviations. ABS Anti-lock brake system. TCS Traction control system, TCM Transmission control module, SRS Supplemental restraint system, BCM Body control module. TPMS Tire Pressure Monitor System

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My ABS light is on and off on a 2006 Mercury Mariner. Do I need to do something to get this light to stay off


SECTION 206-09: Vehicle Dynamic Systems 2006 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual DESCRIPTION AND OPERATION Procedure revision date: 03/29/2005 Anti-Lock Control adobe.gif Printable View (63 KB) The ABS consists of the following components:
  • Hydraulic control unit (HCU)
  • Anti-lock brake control module
  • Front and rear wheel speed sensors
  • Front and rear wheel speed sensor rings
  • Stability control sensor cluster
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The ABS prevents wheel lock-up by monitoring the wheel speed sensors and actuating the HCU modulating the brake pressure to prevent wheel lockup. By preventing the wheels from locking up, the driver is able to maintain steering control and stop in the shortest possible distance under most conditions. The traction control system utilizes the same components as the ABS to prevent wheel spin and help maintain vehicle control during acceleration. The roll stability control (RSC) system utilizes the same components as the ABS and the traction control systems and also monitors the steering wheel position sensor and the stability control sensor cluster to assist in stabilizing the vehicle during abrupt maneuvers.
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The ABS module is self monitoring. The module will carry out a preliminary electrical check of the hydraulic pump motor by turning the pump ON for approximately 1/2 second either when the ignition switch is turned to the RUN position and the brake pedal is not pressed or when the vehicle is in motion and at vehicle speeds above 20 km/h (12 mph). The ABS module will also carry out a wheel speed sensor self-test by sending a reference voltage to all of the wheel speed sensors through their circuitry when the ignition switch is turned to the RUN position, with or without brake pedal application. If a malfunction is detected in the pump or wheel speed sensors, the ABS module will shut down and disable the anti-lock system. Normal power assisted braking, however, remains.
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Visual Inspection Chart
Mechanical Electrical

  • Base brake system
  • Brake booster vacuum hose
  • Hydraulic control unit (HCU)
  • Steering components and suspension components
  • Tire size
  • Wheel speed sensor ring
  • ABS module
  • Battery junction box (BJB) fuse(s):
    • 19 (40A)
    • 22 (40A)
  • Brake fluid level switch
  • Brake pressure transducer
  • Smart junction box (SJB) fuse(s):
    • 6 (15A)
    • 34 (5A)
  • Stoplamp switch
  • Wheel speed sensor
  • Wiring, terminals or connectors


You may need to have the dealer run a scan test to determine the DTC fault codes. Then go from there. Autozone can't read these codes as tehy are chassis codes. They only can read powertrain codes.

Good luck. please rate.

Jan 25, 2011 | Mercury Mariner Cars & Trucks

1 Answer

Where's the abs module located on a 2001 Chev Blazer?


under the hood attached to the ABS hydraulic control unit.

Sep 08, 2010 | 2001 Chevrolet Blazer

1 Answer

Abs light is on and brakes chatter on my 2000 blazer


check abs problem with an Actron Brake Scan tool which sells for about $100. This should help to narrow down the problem to a sensor, a module or other components on the vehicle.

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2 Answers

Why does my abs light stay on?


Dear Madam or Sir,

this is possibly due to a faulty ABS-Wheel-Speed-Sensor. There is one mounted to each wheel, the ABS control unit compares all four signals to compute the moment to intervent. If there is one signal unplausible or missing, the control light will appear to show you that there was an error recognized and stored to the control unit´s memory.

You should see the shop to access the fault memory via diagnosis eqiupment to get to the heart of the matter.

Kind regards from Germany,

AutoDoc P. :)

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The ABS system should be scanned to check where the problem is, however, the most common problem is in the control unit.

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1 Answer

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I have a 2001 chevy blazer I went to hit the button for the 4 wheel drive and the abs light and parking brake light both went on and I lost the spedometer all together. The transmission also would not...


I just spent a bundle on this, the ABS/brake light is the ABS control module dealer says the module alone in1K plus just for the module , the 4WD not working is a 4WD sensor in the dash sucking me dry for another 200.00 bucks, Good luck and hope this helps.

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