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74 Cj5 Proportion Valve Leak

Discussion in 'Intermediate CJ-5 and CJ-6 Tech' started by dkozma, Aug 29, 2018.

  1. Aug 29, 2018

    dkozma New Member

    New York
    Jun 17, 2014
    Hi Folks,

    Installed new Proportion valve. Worked fine for a while then started leaking at the warning switch.
    Brake system is new. Aside from a faulty switch, are there any other possibilities in the system that could cause it to fail?
  2. Aug 29, 2018

    timgr Jeepin' Nerd Sponsor

    Medford Mass USA
    Aug 10, 2003
    Faulty part. Should not leak. The warning switch section is simple - look at the TSM. It's a piston that only moves when there is a pressure imbalance between the front and rear circuits. There should not be any (or very much) pressure that can leak out of the switch part.
    Last edited: Aug 29, 2018

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