C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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78 Vette Brakes Issues

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Old Apr 24, 2014 | 05:17 PM
  #21  
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The distribution block gives a lot of owners greef, buy a new one and be done with the "light stuck on" problem.
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Old Apr 25, 2014 | 08:44 AM
  #22  
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Originally Posted by petes74ttop
The distribution block gives a lot of owners greef, buy a new one and be done with the "light stuck on" problem.
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Old Apr 30, 2014 | 09:10 PM
  #23  
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Originally Posted by Jud Chapin
To gravity bleed, start with the caliper furthest from the M/C which would be the RR and work forward. The rears have 20 bleeder screws so do both. Just open the bleeder screws, I do one at a time, using a clear plastic hose connected to the bleeder and let them drip in a 2 cup measuring cup. I usually just bleed until the clean fluid appears, but in your case, all your fluid s/b fresh so I'd probably take at least a cup from each bleeder. Naturally, keep your eye on the m/c fluid level as you don't want to empty it or you'll be back to square one. This process can take a couple of hours.

Speaking of the m/c, you said u bench bled it. Be sure u got all the air out in doing so.
First thanks to all you for your responses. But still no luck. I still only have front brakes and the dash brake light on. I have rebleed the M/C . I have tried gravity feed, vaccum and the 2 man. I used nearly 1 1/2 gallon of brake fluid. I have good pressure at all four calipers.

I guess I will order a proportional and try that.
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Old May 1, 2014 | 08:02 AM
  #24  
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Originally Posted by crd86vette
First thanks to all you for your responses. But still no luck. I still only have front brakes and the dash brake light on. I have rebleed the M/C . I have tried gravity feed, vaccum and the 2 man. I used nearly 1 1/2 gallon of brake fluid. I have good pressure at all four calipers.

I guess I will order a proportional and try that.
Yeah, sounds like the pressure differential switch is stuck.
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Old May 1, 2014 | 08:13 AM
  #25  
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Good luck and be sure to keep us posted.
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Old May 3, 2014 | 08:46 PM
  #26  
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Here is the update, the proportional valve was bad. Replace it today. Dash brake light is off and I have a good brake pedal. I am ever glad that is over. Thanks again to everyone!!!!
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