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Constant Brake Lights...

Discussion in 'Early CJ5 and CJ6 Tech' started by Chris Insull, Apr 8, 2015.

  1. Apr 8, 2015
    Chris Insull

    Chris Insull All roads lead me back to the beach... 2023 Sponsor 2022 Sponsor

    Chesapeake, VA.
    Joined:
    Sep 22, 2002
    Messages:
    805
    I'm fairly certain I'm on the right track here but thought a sanity check was in order...;)
    Running, head/ tail and signal lights all work as advertised. Brake lights remain on constantly. MC servicing is spot on. Disconnecting forward hyd BL switch has no effect but disconnecting rear switch extinguishes lights. Cleaned and treated spade terminals on both switches and harnesses with same results. I bought two Echlin SL-139 switches from NAPA but think it will only need one. Am I correct to "assume" the next logical step is to replace the rear hyd switch?
    TIA!!
     
    Chris Insull, Apr 8, 2015
    #1
  2. Apr 29, 2015
    B_hester

    B_hester Member

    Joined:
    Dec 23, 2014
    Messages:
    75
    I had the same problem a month ago. My problem was that the brakes were constantly slightly pressed the entire time. There is a bolt on it to move it towards and away from the master cylinder. I just loosened it a bit and she was good to go. It might be the same for you!
     
    B_hester, Apr 29, 2015
    #2
  3. Apr 29, 2015
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    Aug 3, 2003
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    Sounds like the rear switch has gone over to the other side.
     
    PeteL, Apr 29, 2015
    #3
  4. Apr 29, 2015
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
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    Nov 27, 2006
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    2,793
    If you leave the wires off of the rear switch and connect the wires to the front switch do the lights work properly?
     
    1960willyscj5, Apr 29, 2015
    #4
  5. Apr 30, 2015
    Chris Insull

    Chris Insull All roads lead me back to the beach... 2023 Sponsor 2022 Sponsor

    Chesapeake, VA.
    Joined:
    Sep 22, 2002
    Messages:
    805
    Yup... Replaced rear switch and issue went away. Cut switch open and it was corroded. Replaced front switch and all fluid in system for good measure.
     
    Chris Insull, Apr 30, 2015
    #5
  6. May 2, 2015
    ojgrsoi

    ojgrsoi Retired 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Weatherford, TX
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    Dec 30, 2002
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    You did it right. I learned that the hard way.
     
    ojgrsoi, May 2, 2015
    #6
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