1990 SSE ABS LIGHT ALWAYS COMES ON - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-25-2007, 02:53 PM   #11
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Do the guys at Midas know anything about these cars other than how to take a wheel off?
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Old 08-26-2007, 01:32 AM   #12
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If both the ABS and Brake light are illuminating when you apply the brakes, you have a problem which could lead to a serious safety issue. the Teves electro-mechanical system in your car operates much differently than a conventional vacuum assisted braking system.

For those that wish to learn all about the Teves system, they need only to search for "Teves" and author "padgett" (check "Display results as" [posts] ). I would consider him the foremost authority of the Teves system on this board. Although we don't hear from him too often anymore, he has left much information about these braking systems.


For a more direct answer, I would suspect a failing pump or accumulator. Brake assist comes from the pump, providing pressure, to the accumulator which stores this pressure for use when the brake pedal is depressed. The accumulator is said to have a finite life span which lasts about 10-12 years and I can't see any reason that the pump would last any longer without some kind of service.
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Old 08-26-2007, 12:55 PM   #13
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Basically this is how it works. That ball on the top (Accumulator) has a couple thousand psi of air in it, and it discharges when you push the brakes and recharges when the pump turns on. When the car is sitting overnight the accumulator leaks down, some worse than others, and then the next day the accumulator is empty so it cant assist the brakes so they go hard until the pump can repressurize the accumulator. There are 3 conditions in which the pump and warning lights work.
1. Accumulator drops in pressure a little bit, the pump turns on to recharge.
2. Accumulator drops in pressure more, which turns on the pump AND turns on the yellow ABS light.
3. Pressure drops a lot which turns the pump on, AND the yellow ABS light, AND the red brake warning light.

If your yellow and red lights are going on when you push the brakes it might be because the pressure is either lower than it should be, or it uses a lot more pressure than it should to activate the brakes.
This is one possible cause of your problem. It happened to my car when the pump died.
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Old 08-27-2007, 03:03 PM   #14
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so i take the car to the mechanic where i purchaed it ..
he hooks up scanner..

NO CODES at all . none , nada zilch.
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Old 08-28-2007, 10:17 AM   #15
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so sinnces we arer talkinn abbout the abbs there is oe hing that i would like to mention. yesterday i took mmy calibers off tryinn to clean everythinng off in there cause it mmade a sounnd like rust flyinn arounnd inn there. when i got downn to mmy wheel bbearinng i realized sommethinn..... the part of the wheel bearin that is used by the abs was broken off and all rusted
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Old 09-14-2007, 02:31 AM   #16
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That light could me so many different things, your best of to take it to a shop so that they can tell you lol,
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Old 09-15-2007, 10:45 AM   #17
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That abs wheel ring if missing will make the brakes pulsate as the computer will think the wheel if locked with no signal to it.
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