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brake light will not turn off

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by blazentank, Dec 27, 2001.

  1. blazentank

    blazentank 1/2 ton status

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    For about 2 weeks now my brake light on my 86 blazer's dash guage thaingy has not turned of. I had the parking brake set for about 2 days when i had the front tires off while fixing the axle and ever since then the break light has been on. yes i let of the parking brake. please help the light is annoying

    "When you say i drive a fullsize are you calling my wife fat."
    J/K i was bored and made that up i don't even have wife i'am only 17.
     
  2. K10ANDYKHAMNIC

    K10ANDYKHAMNIC 1/2 ton status

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    get a manual , read the part about the proportioning valve , it tells u how to fix it .

    Kick It In The Firewall !!
    O R D's axles
    NO BREAKAGE
     
  3. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    The switch in the prop valve could be bad (or needs to be bled) or it can even be the switch on the parking brake assembly itself. I you look at the parking brake and move it through full range of motion you will see the switch. Sometimes the switch wears out or gets stuck (especially in autos where most people don't use it much). If you didn't take the brake lines off, I would suspect the parking brake over the prop (combo) valve....but you never know.

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot> click here </a>
     
  4. jimmyjack

    jimmyjack 1/2 ton status

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    Check you brake fluid for kicks too. I personally have never heard of a proportioning valve going bad.

    That jeep thing? Yah I understand it....... Like my Blazer? <a target="_blank" href=http://community.webshots.com/user/blazerk5>http://community.webshots.com/user/blazerk5</a>
    Jim
     
  5. Corey-88K5

    Corey-88K5 1/2 ton status

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    Here are a couple of suggestions,

    My blazer does the same thing with the parking brake. Its the cable getting jammed and the parking break leaver doesn't go all the way up. hold tension UP on the break leaver as you pull the release for the P-brake. Next, if that doensn't work, get under the truck, and take the wire off the valve for the brakes, that will atleast turn the light off!

    Best of luck,

    Corey
    88K5

    [​IMG]<font color=red>Girls Like Guys In Bow Ties
    <a target="_blank" href=http://www.geocities.com/corey_perez>http://www.geocities.com/corey_perez</a>
     
  6. Burt4x4

    Burt4x4 3/4 ton status

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    this is probly not it but thought I would share: My red light would only come on when braking. To make a long story short I found a fliud bottle seal in my master cylinder. You know the little piece of foil that seals the bottle. I guess it fell into the mater resavor and every time I press the brake the seal would block off the hole and make the bad pressure light turn on!![​IMG]!!
    Good Luck sound like the folks are helpin you out !!

    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
    <a target="_blank" href=http://coloradok5.com/gallery/Burt4x4>http://coloradok5.com/gallery/Burt4x4</a>
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

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    If it never shuts off, I'd first off suspect that cheesy e-brake warning switch someone else mentioned. One wire, brown, running to it. its a plug, unplug it and see if the light goes off. if it doesn't, try grounding it and see if it does. Can't remember which it needs to shut off. IIRC, the pedal grounds the switch when its depressed. If the pedal moves too far, I believe thats when you start having problems "breaking" the switch.



    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>www.dorianyeager.com/index2.html</a>
    Why insist on counting when the ring gear has the tooth counts stamped in?
     
  8. michaelm

    michaelm 1/2 ton status

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    if it is the combo valve it means you have a fluid loss and it has blocked that system, sounds like rear if you arent complaining about zero braking

    whoever suggested pulling the wire to the valve is a F-ING A-HOLE. IMHO
     

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