385 AC Button Switch

Discussion in 'Peterbilt Forum' started by pdh, Sep 21, 2015.

  1. pdh

    pdh Bobtail Member

    7
    1
    Jan 16, 2014
    0
    AC on my 385 was working correctly. Crawled in yesterday and tried to turn on AC. The AC button switch will light but will not stay engaged. Lights as normal as long as I am pushing it - but disengages as soon as I take my finger off. Does that indicate low charge and therefore low pressure switch cutting off? Can I hold the button down to override the low pressure switch to pump some 134 in?
     
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  3. TeamRodgers

    TeamRodgers Bobtail Member

    14
    2
    Sep 20, 2015
    0
    Definitely the relay,Just like a flasher relay .
     
  4. pdh

    pdh Bobtail Member

    7
    1
    Jan 16, 2014
    0
    Right on the money. Many thanks.
     
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