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-   -   ABS Brake Bleed (https://www.gmforum.com/oldsmobile-171/abs-brake-bleed-295223/)

Old Olds Sep 22, 2010 11:36 AM

ABS Brake Bleed
 
I need to bleed my ABS on my '98 Old 88. Manual is telling me to use a Tech 1 scan tool to cycle the ABS valves. Is there an alternate tool? Do I need special module/cartridge for a Tech1 if I were to get one?

SignOfZeta Sep 22, 2010 08:55 PM

Welcome to the forum! When you get a chance, why not go introduce yourself in the Introductions for New Members section? (We don't bite. Really.)


Originally Posted by Old Olds (Post 1479438)
I need to bleed my ABS on my '98 Old 88. Manual is telling me to use a Tech 1 scan tool to cycle the ABS valves. Is there an alternate tool? Do I need special module/cartridge for a Tech1 if I were to get one?

Now, are you just trying to flush and bleed the brake fluid, or do you have a definite problem with the anti-lock portions? If it's only a simple fluid change, you don't need a Tech-anything. Hope this helps.

BillBoost37 Sep 23, 2010 08:25 AM

Most of the time you don't need to cycle the ABS unit with it's self bleed procedure. Mostly you can bleed normally (pumping brake with someone at wheel or a power bleeder) and that will fill the ABS w/o issues. Only if you have a problem with air in the system will you need the abs to cycle.

Old Olds Sep 26, 2010 04:35 PM

Looks like I have a leak at the Pressure Modulator Valve Assembly. The lines are pretty bad around it and the bottom of the assembly is always has a drip of brake fluid forming around it. So I'm changing it out. Any idea where I can get a rebuilt one. The dealer wants $750 for a new one.

BillBoost37 Sep 27, 2010 07:22 AM

Not sure, I've only ever found them at the junkyard if they went bad.


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