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Old 11-12-2004, 06:39 PM
Grumpy
 
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Brake pedal to the floor

92 isuzu rodeo, brake pedal over a corse of about 2 miles went all the way to the floor and the brake/anti lock light came on when the pedal was on the floor. The brakes no longer work properly and only slightly work when the pedal is on the floor.

Did'nt have much time to check everything, but I did a quick check on the fluid and it was full in the master cylinder, checked the pads and they are low, but still have material. My guess is that the master cylinder has failed, seen this a many times, but on older viehicles and also always seen the master cylinder bleed on the sides when it happens, no brake fluid leaking anywhere. Calipers are not leaking either. Could this be as simple as pulling a fuse out for the anti lock? Or is it really something else I'm not seeing. There is also some kind bridge installed after the master cylinder(from the factory) where the lines connect too, and then they go to each caliper.

So what do you all think, havent spent more than 5 mins looking at it, it's cold and raining here right now. I have about 3 hours to repair it tomorrow morning.

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Old 11-12-2004, 08:23 PM
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I doubt it's a fuse, as this would be a safety design flaw if a blown fuse would cause you to loose the brakes. I suspect youve had a master cylinder go south.

Vince
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Old 11-12-2004, 08:49 PM
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When the master cylinder in the green caprice went out on me it didn't bleed on the sides, like you said you've seen.

I say it's your master cylinder
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Old 11-12-2004, 08:55 PM
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pulling the fuse will only disable the abs, causing the light to come on. it does not cause the brakes not to work. the abs light is telling you have a problem. if the master cyl stays full after several pumps, then it is likely the master cyl. hope this helps.
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Old 11-12-2004, 09:19 PM
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Low pedal

I agree sounds like a master cylinder. ABS system failures do not effect a vehicles normal braking system. That was a Goverment requirement when the auto makers started the ABS systems.
Sounds like your piston seal inside the master cylinder has went out and it has no ability to create pressure.
The bridge you are refering to is the combination valve which distributes brake fluid to each wheel. They usually last about 300 years without failure.
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Old 11-12-2004, 09:59 PM
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Good, did'nt know if isuzus were different or not, sue me I'm not a ricer. Then I should be able to patch the thing up in the morning and be on the way to work.

thanks for the info!
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