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Vt brake warning light

Discussion in 'VT - VX Holden Commodore (1997 - 2002)' started by yz300, Nov 6, 2019.

  1. yz300

    yz300 Member

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    Hi. I.ve just bled my brakes on my vt wagon. Went for a drive and the hand brake/brake fail light is staying on and beeping at me. The brakes seem to work ok. Could i have knocked an abs wire or something? Any ideas? Thanks, Gus.
     
  2. Sabbath'

    Sabbath' Redblock Jesus

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    Did you refill the master cylinder reservoir?
     
  3. yz300

    yz300 Member

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    Hi. Thanks for your reply. I actually drained out what i could with a syringe as the oil was so dirty. I then used new oil for the bleeding. Just incase it might mean something, the first few times i took off after the job it sounded like a brake was sticking. I also hosed the bejesus out of the calipers. I used a one man bleeder thingo and a bit of oil leaked on the calipers. Thanks again for your reply.
     
  4. Davo_vx

    Davo_vx Member

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    Sounds like you may have air trapped somewhere. Also I had problems with my brakes grabbing when I first got mine and end up having to change the master cylinder and bleed the system to fix it.
     
  5. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    ABS light is different to the handbrake light, did you make sure you kept fluid topped up at all times in the reserve ? If not you will have put air in the system so you will have to bleed out the system again.
     
  6. yz300

    yz300 Member

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    Hi. Thanks for your reply. Do you know if it.s possible to bleed the master cylinder? I did it on an XE a long time ago but can.t remember how. Can the ecu really tell that there.s air in the system? Thanks again, Gus.
     
  7. ltdslip

    ltdslip Member

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    From the owners manual...
    "Park Brake & Brake Fail" warning lite, If the symbol illuminates while driving 'and' the park brake is released, a fault with the brakes is indicated.....
    A warning will chime if you attempt to drive off without releasing the park brake.

    From the service manual...
    MASTER CYLINDER CONSTRUCTION
    The internal parts of the master cylinder comprise a primary piston with an L type seal and an O-ring seal, a secondary valve which incorporates a centre valve, a caged spring and two L type seals, a return spring, a secondary piston stop pin, and a fast fill valve. In all vehicles, a proportioning valve is located in a parallel bore in the same casting. This valve is used to maintain the front to rear hydraulic pressure balance and, should one of the two separate systems fail, a separate piston and differential switch (brake warning lamp switch) are incorporated into the design, so that the vehicle operator can be warned of a system malfunction.

    Might need to bleed the system again.
     
    Last edited: Nov 7, 2019
  8. Davo_vx

    Davo_vx Member

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    As itdslip has said I would suggest you you bleed it again, more than likely just got air in the system. Maybe get a mate and do the two person method and go from there if your still having dramas.
     
  9. yz300

    yz300 Member

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    Hi thanks for all your replies. As i emptied the fluid bowl and syringed what i could from wherever the bowl leads into the master, could there be air trapped up the top somewhere or do you think it.d eventually come out the calipers when i bleed again? I think that as i put more oil in before bleeding then any air would.ve just risen to the top. Does this sound right? Thanks again.
     
  10. yz300

    yz300 Member

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    Hi. Thanks for your reply. Might you be able to read my reply above and tell me what you think?
     
  11. Davo_vx

    Davo_vx Member

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    That's the problem if you emptied the reservoir completely then you would of got air in the system. You should of left some in it when syringing out and filled back up before bleeding. I would suggest bleeding at the master then bleeding all the calipers again for good measure.
     
  12. yz300

    yz300 Member

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    Thanks again. Do i bleed the master by loosening the lines that come from it and pressing down the brake pedal?
     
  13. accentstencil

    accentstencil Well-Known Member

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    If air did get into the system and you have ABS then I think it requires the ABS module to be bled, not something you can do yourself I believe.
     
  14. Davo_vx

    Davo_vx Member

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    Yeah crack the lines get someone to push the pedal to the floor and lock them off before releasing the pedal, good communication is key here and when doing the calipers. What accentstencil said is correct it can be hard to get air out of the abs if it got in there. I've had luck with taking the car for a drive and jamming the brakes on at 60kms so the abs kicks in then bleeding at the calipers though. Bleed at the master then calipers take it for a spin if you still got air jam on brakes at speed so abs kicks in if that gets rid of warning light then bleed at the calipers again and you should be good others wise you'll have to take it somewhere to bleed out the system.
     
    Last edited: Nov 7, 2019
  15. Davo_vx

    Davo_vx Member

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    Have you tryed going for a drive and making the abs kick in yet before you do the other stuff? If you do and the warning goes away just bleed at the calipers after.
     
  16. Davo_vx

    Davo_vx Member

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    Whatever you choose to do make sure you keep the reservoir topped up or you'll get more air.
     
  17. ltdslip

    ltdslip Member

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    Reference from the manual...
     

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  18. Davo_vx

    Davo_vx Member

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    Interesting, I can only speak from experience mate when I replaced my master I bled at the master using the method I mentioned, google scotty Kilmer bleeding at the master to see, then had to bleed at the calipers to get all the air out. I wouldn't pump the brakes 10 times without locking them off in between strokes unless you have this pressure bleeder they are talking about otherwise you'll have air for days.
     
  19. ltdslip

    ltdslip Member

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    Just thought I'd throw it out there for something to think about.
    Usually get my brake fluid replaced by mech when regos due
     
  20. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    Plenty of how too on U Tube, is the light ABS or Handbrake info light staying on? I say you bleed it incorrect and now its lost pressure, you keep saying oil so what did you use? You should be using Dot 4 fluid.
     

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