A Small Brake Issue - advice please

May 18, 2019 6:08 PM - 214 Views Create A New Thread

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Pickerington, OH

Brake warning light now on
OK, I need a little help. It's probably something simple.

1992 Vette, with ABS. I put on new pads and rotors all the way around. I opened the bleeders because I didn't want the fluid backing up in the ABS system (I think there is a pump...)

The back pads have a little sensor tab on them, and the inboard pads are specific from side to side. I know this because I got one in, and noticed on the next wheel that it didn't match EXACTLY, so I stopped and switched it out.

Then I started bleeding on the drivers rear, with my gun. It didn't seem like it was drawing right, so I abandoned that, and went with my usual partner in the drivers seat. All 4 were bled, but they didn't seem to be loaded with air either. While the brakes seem fine now, the BRAKE light in the main instrument cluster is on. This is not the ABS light.

I pulled the negative battery cable for a full 3 minutes, to see if I could get the code to clear, but no luck. I didn't even touch the pedal, and it's still on.

It's probably something simple. Anyone have any ideas?


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  • GeneF
    Jun 4, 2019 at 6:15 PM

  • After new master cylinder, even with bench bleeding I could not get the air out of the system. Turns out the only effective way to get the system blead is to hook up the scan and tune tool and run the ABS pump. Makes sense, cause the amount of flow I was getting was less than adequate.

    $240 to flush / bleed at what used to be Bob McDorman Chevrolet.

    My wife says they work great now.
    Approx spend:
    $100 pads
    4 rotors $100
    master cyl $140
    bleed and flush $240

    I figured from the start that the dealer would have charged $1200 for a complete job. They also would likely have wanted to add for some new calipers, just because...

    Anyways, we were shopping for 2 new front tires to replace the gatorbacks on it. Their price was quite good, which surprised us because they offered, we didn't ask. Here's the thing, it's going back. They aligned it with the new tires on the incorrect direction wheels, and of course the tires were mounted correctly. They get to do the tires over again. This dealership is not what it once was, when Bob owned it. They previously had 3 or 4 technicians that only worked on Corvettes. They had that big of a Corvette clientel. NOT ANY MORE!

  • GeneF
    May 20, 2019 at 6:37 PM

  • I ordered a new master cylinder today. That slide valve must be gunked up after 25 years. I could open it up and try to put a bottle brush in there and clean it, by why chance it. Unplugging the terminal turns the light off, while the float and e-brake still make the light come on. It's a 99.9% chance that's it. Besides, it certainly will not hurt to change it.

    I'll write back with the results.

  • whipsold39
    May 19, 2019 at 9:56 AM

  • Not sure on a vette but try backing up and hit the brakes hard a couple times and possible it will reset the codes. It works on some vehicles Stranger things have happened. GOOD LUCK until some vette experts on this sight helps out.

  • GeneF
    May 19, 2019 at 9:36 AM

  • OK, this morning I verified the E-brake is not on. Unplugged the low fluid float in the resavor.\, and in both cases the light stayed on. Unpluged the proportioning / warning valve and the LIGHT GOES OFF. So, how do I get that little bugger to slide back to center?

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