Brake Light Stays On - 66 Buick Electra

Discussion in 'Shade Tree Mechanics' started by easyellis, Jun 10, 2018.

  1. easyellis

    easyellis Member

    Any help greatly appreciated. Was driving my car and no problems with the brakes. Pulled in garage and when I started it up again I noticed the brake light stayed on. Checked fluid and fuse and both are good and emergency brake isn’t depressed. No wires noticed on the master cylinder or proportion valve. Am I missing something here, where else should I be looking?

    Thanks Ed
    Last edited: Jun 10, 2018
  2. Electra Bob

    Electra Bob Well-Known Member

    I vote for emergency brake switch. It's a ground operation switch so disconnecting is a quick test. If light goes out it's the switch.

    Could also be a ground short or bad proportioning valve switch.

    A more serious cause would be a loss of pressure on either front or rear hydraulics causing the proportioning valve to move all one way disabling the leaking end and maintaining pressure for the other. This operates the switch mounted on the top of the valve.

    Here's hoping for a simple fix :)

  3. Nailhead

    Nailhead Gold Level Contributor

    I may be wrong but I don't think 66 has a proportioning valve and/or switch---just a distribution block. If that's the case then problem is the emergency (parking) brake switch that Bob mentioned first.
  4. My3Buicks

    My3Buicks Proud Liberal

    Pull the emergency brake release and with your foot lift up on the emergency brake pedal. I had one Buick I alwats had to do that to to get the light out
  5. telriv

    telriv Well-Known Member

    More than likely a BAD brake light switch or the switch needs adjustment. Located just above the brake pedal. Dis-connect one wire to see if the lights now go out.
    DasRottweiler likes this.
  6. My3Buicks

    My3Buicks Proud Liberal

    I think it’s the emergency brake light that is on not the taillights but I may have misunderstood
  7. easyellis

    easyellis Member

    66 does not have the valve, did not know this initially. Was all over the engine bay taking pics to see if I missed it.
  8. easyellis

    easyellis Member

    Tried this already to no avail.
  9. easyellis

    easyellis Member

    I am sorry but it’s the emergency brake light.
  10. easyellis

    easyellis Member

    It’s the brake light. How are you feeling, last time I contacted you for my distributor you were down and out!
  11. telriv

    telriv Well-Known Member

    Feeling MUCH better thank you. I'm back to doing rebuilds on AFB's & distributors.

    Tom T.
  12. easyellis

    easyellis Member

    Glad that you’re back in the saddle!

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