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Brake lights stuck on - 98' w900

Discussion in 'Kenworth Forum' started by Bluesub454, Aug 11, 2012.

  1. Aug 11, 2012 #1
    Bluesub454

    Bluesub454 Bobtail Member

    6
    0
    Oct 22, 2011
    Niagara, WI
    0
    Hi, I read alot here but havn't posted much. I just ran into an issue today and need to fix it by tomorrow if possible. I was driving and my cruise control wouldn't work. When I parked I found the brake lights stuck in the on position. If I bleed off all the air the brake lights go out. If I start the truck the cruise won't work to bring up the RPM even immediatley with "no" air built up yet. Brake lights come on almost immediately as well. Can anyone help me out with this issue? Thanks!
     
    Bluesub454, Aug 11, 2012
    Bluesub454, Aug 11, 2012
    #1
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  3. Aug 11, 2012 #2
    Tricky Rick

    Tricky Rick Light Load Member

    177
    91
    Oct 25, 2010
    Northwest Mississippi
    0
    Make sure your Johnson bar is all the way up. I think you younger drivers call it a trolly valve, or trailer brake valve.
     
    Tricky Rick, Aug 11, 2012
    Tricky Rick, Aug 11, 2012
    #2
  4. Aug 11, 2012 #3
    bender

    bender Road Train Member

    2,105
    1,356
    Jul 20, 2010
    Don't Kid Yourself
    0
    Your brake pedal pivot could be froze up and holding pressure on the foot valve plunger which would cause both problems. Try pulling up on the brake pedal with your hand.
     
    bender, Aug 11, 2012
    bender, Aug 11, 2012
    #3
  5. Aug 11, 2012 #4
    Jorihe84

    Jorihe84 Road Train Member

    2,763
    1,333
    Sep 1, 2010
    North Florida
    0
    Did this once by accident
     
    Jorihe84, Aug 11, 2012
    Jorihe84, Aug 11, 2012
    #4
  7. Aug 11, 2012 #5
    screamin eagle

    screamin eagle Light Load Member

    103
    39
    Apr 18, 2009
    texas
    0
    Also, your floor mat under your brake pedal will cause all of the things your describing....
     
    screamin eagle, Aug 11, 2012
    screamin eagle, Aug 11, 2012
    #5
  8. Aug 11, 2012 #6
    skateboardman

    skateboardman Road Train Member

    6,232
    5,706
    Jan 14, 2012
    flatbed heaven
    0
    i had one where the handvalve was backbleeding into the system, making it act as if it were partially pulled down. if that s the case you can bypass it.
     
    skateboardman, Aug 11, 2012
    skateboardman, Aug 11, 2012
    #6
  9. Aug 12, 2012 #7
    Bluesub454

    Bluesub454 Bobtail Member

    6
    0
    Oct 22, 2011
    Niagara, WI
    0
    Thank for the reply. I did discover the johnson bar was slighty on after I wrote the post. That solved the problem.
     
    Bluesub454, Aug 12, 2012
    Bluesub454, Aug 12, 2012
    #7
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