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Old July 12th, 2009, 02:12 PM   #1
Disturban
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Default ABS light on after new pads?

I installed new pads on my moms bonneville 2001 and after the new pads I went to pump the brakes like normal and never got pedal pressure back and the abs light is on...wtf? I have done a million brake jobs in the past and never had this happen before. I have some pedal pressure and I can drive the car but when I really press on them they will slowly go to the floor. What is wrong?
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Old July 12th, 2009, 02:50 PM   #2
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As a rule, the brakes on most vehicles with anti-lock brakes can be bled in the usual manner, provided no air has gotten into the ABS mod assembly. If the only components you replaced were downstream of the modulator (calipers, wheel cylinders, brake hoses or lines), chances are normal bleeding procedures will clear the lines of any unwanted air.

Brakes can be bled manually, with a power bleeder, injector tool or vacuum bleeder. It does not make any difference which method you use as long as all the lines and components are flushed with enough fluid to remove any trapped air bubbles or air pockets.

Did you retract the caliper forcing the fluid back to the master cyl? or via bleeding?
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Old July 12th, 2009, 07:36 PM   #3
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I never opened the bleeder screws, I took the top off the master cylinder and pressed the pistons in with a c clamp like I have done a million times on other cars. I scanned the system and have a bad sensor on the right rear wheel so the abs light is not my fault...I think the master cylinder is bad and that's why the brakes are spongy and if I really press on them they will slowly go to the floor.
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Old July 12th, 2009, 07:53 PM   #4
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fluid leaking anywhere ?? if you didnt open the system to air anywhere.. your master prob took a shit.. i cant see that triggering the ABS light thou.
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Old July 12th, 2009, 08:35 PM   #5
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Quote:
Originally Posted by Mclovin View Post
fluid leaking anywhere ?? if you didnt open the system to air anywhere.. your master prob took a shit.. i cant see that triggering the ABS light thou.
ABS is a bad sensor on the rear wheel...I am 95% sure the master cylinder did take a shit because I never cracked any bleeder screws open to let air in the system.
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