Question about 2002 Pontiac Grand Am

3 Answers

What is the box for under the battery it has 2 lines going in from master cyclinder and four lines coming out something about an electric motor

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  • Ned  White
    Ned White May 30, 2010

    anti-lock brake system?

  • pbushee May 30, 2010

    it's on a pontiac grand am 2002 we believe it has something to do with the abs system. because the brakes have no pedal what so ever, we bled all the lines, checked the master cyclinder, power booster everything else seems to be working fine. this thing that is located below the battery box has 2 lines going into it from the master cyclinder and 4 lines coming out. hope this enough info. thank you

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  • Pontiac Master
  • 2,100 Answers

The traction control, I am not sure of, but the anti lock brake system does nothing to your brakes except make them stutter to a stop so that the wheels don't lock up and you can steer the car. Even when disabled, you still have brakes, no abs though. As far as your brakes go, You just bled them and still have no brakes?? You lost the pedal and bled the brakes to try to get he pedal back with no luck. Did somebody damage the brake line somewhere? Any leaks? Puddles? Wet inside the wheels? Does the pedal pump up enough to get a pedal started? If the power booster is connected to the vacuum system with no air leaks, and you have fluid in the reservoir, start the bleeding again at the right rear wheel, farthest from the reservoir, Do it about 4 or 5 times, lock up the nut every time before moving the pedal, check the reservoir and keep it full, catch the used brake fluid in a cup with a hose on the bleeder, go to the left rear wheel, do the same thing, work your way around to the front. If you have to do it twice, do it. Brakes are mechanical, not electric or anything complicated, only so much will prevent them from working. If you don't get any air out of the line and still can't get a pedal, You might have other issues, If you don't get fluid out of each bleeder, you could have a soft line that has cappilaried, ? Means it has popped on the inside and won't let fluid pass either way. Are the lines rusty at all? Try it and let me know.

Posted on May 30, 2010

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  • Master
  • 2,317 Answers

That is the traction control/ABS modulator, or hydraulic modulator.

Posted on May 30, 2010

  • James Milzheimer
    James Milzheimer May 31, 2010

    I would check to see if you have any frozen calipers/ and or wheel cylinders.

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  • Master
  • 2,309 Answers

That is the abs unit, be nice to it

Posted on May 30, 2010

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3. Once you are sure the valve is tight, have them pump the clutch pedal a couple times . Repeat step two until the pedal has a full stroke.

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