Question about 1993 Chevrolet Suburban

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I have encended in the control panel the ligth (ABS Antiblock Brakes). Infortunatelly in Venezuela the mechanics dont have more experience with the functioning of the ABS Computer Module and Wheel Speed sensor. My car is a Chevrolet Grand Blazer 93, .. I think this model is equivalent a 1993 Chevrolet Suburban C 2500 in USA. The ABS computer Module in my car i a KELSEY HAYES 4Wall EHCU, and tthe Speed Sensors are a SIAL S216. In order to solve soon this problen, I really apreciatte some expert infomations. .. Excuse me for my bad English, ... Regards, A. Martinez

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Most abs faults start at the sensors in the wheels
can be dirt or other material between the sensor and the rotor, broken wiring, missing wiring, faulty wheel bearings allowing the rotor to touch the sensor tip
there is no real necessity for abs system as the antiskid action is only there to allow steering control under heavy braking
for easy stopping and moderate braking , it doesn't work.
it is an electronic controlled pump that maintains line pressure to foot brake pressure for when a wheel stops turning , the valve releases the ;line pressure for a split second and then reapplies the line pressure when wheel rotation is again recorded
get yourself a workshop manual for the vehicle ( any gm product ( suburban , s10, blazer ) will have the same system installed and the principle of operation is the same for all manufacturer models

Posted on Apr 23, 2017

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Posted on Jan 02, 2017

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SOURCE: Chevrolet Blazer S10 1993

i recomend getting a book from the auto parts store. it will have all the electrical diagrams. it costs less than $20.00 and will be a good investment. i have a book for all my cars and have never had to go to a shop.

Posted on Jul 09, 2008

  • 16 Answers

SOURCE: abs wheel sensors on 2004 chevy tahoe

yes they are four wheel abs that means there are four sensors one for each wheel

Posted on Nov 25, 2008

c17hydro
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SOURCE: put new brake pads and shoes, turned rotors and

HAve you troublesot the ABS?

One thing it DOES sound like is the power brake booster. The vacuum size has a leak.

Posted on Oct 07, 2009

  • 12104 Answers

SOURCE: 1998 Chevy Blazer abs problems! The abs motor

yes its at the rear of trans

Posted on Oct 23, 2009

  • 432 Answers

SOURCE: abs codes 1995 silverado 4x4 kelsey-hayes

Both show as trans codes in my book. #73= Pressure Control Solenoid"If return amperage varies more than 0.16 amps from command amperage" and # 86 =Low Ratio, and this one has no definition. and they are listed under 96 disel W/4L80E and 94 gasW/4L60E.Well hope this helped.

Posted on Feb 08, 2010

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One of your wheel sensors are defective. Have a mechanic troubleshoot it. You can still drive without the ABS. Your regular brakes will still work.

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First of all have the ABS scanned and check the history for codes that would zero it down to which one it is then check the wire for loose connection or corrosion.

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look under the truck at the ****** and check the wiring to the sensors if good may be a bad sensor,also check the wiring and connections to the abs wheel sensors [ located from frame to the hub behind the rotors ] the abs also acts as speed sensor if problem was with an abs sensor at the[ hub] wheel usually set the brake system to normal power brakes [if u hit brakes hard will lock up or skid wheels] with the abs light coming on if the speed sensor at ****** malfunction can and usually causes shift problems

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The ABS system is related to emergency stopping, not normal brake use, where you don't want the tires to lock-up when the brakes are hit very hard. ABS stands for Antilock Brake System. When the ABS light is on, the ABS system is not active. This means the ABS will not be Antilock when you need it. This does not mean you don't have brakes. The brakes you have are normal brakes without the added feature of antilock.

The light is on because a system fault has been detected. Most of the time this is a wheel speed sensor that has failed. Basically the system works by having 4 wheel speed sensors connected to a control unit. The control unit determines how much braking presure each wheel needs according to how much pedal presure you are applying, related to the vehicle speed, and the rotation speed of each wheel. If one wheel is spinning slower than the others that would mean it is locking up (less braking efficientcy) and the control unit then reduces the presure applied to that wheel so it doesn't lock up.

If a wheel speed sensor goes bad the entire system can't function so it shuts down and it is now a regular braking system. This means that it will work and feel fine to you, the operator. But in an emergancy, the ABS will not function and the brakes may lock up which is not as efficient as ABS.

I recommend you get it scanned for codes and find out what is wrong. It is a great safty feature that I think you are better off with, than without.

Some auto parts stores will scan your car for codes for free, like autozone and others. Call around and find that free scan. Then take it to a reputable shop, dealer, or your brother-in-law who is a master mechanic.

Good luck, and be safe!

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