Air leaking

Discussion in 'Peterbilt Forum' started by Sodapop, May 11, 2024.

  1. Sodapop

    Sodapop Light Load Member

    93
    7
    Mar 19, 2010
    Blytheville,Ar
    0
    2004 379 Pete, When i apply the brakes , I hear air coming from behind the panel at the fire wall...Was told there are 2 valves, switches there..Anyone with more detail and possible part #'s Thank you
     
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  3. Deere hunter

    Deere hunter Road Train Member

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    4,341
    Aug 5, 2017
    Shallowater Texas
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    Check and see if your brake lights are working. Your air over electric switch probably blew into two pieces.
     
  4. Sodapop

    Sodapop Light Load Member

    93
    7
    Mar 19, 2010
    Blytheville,Ar
    0
    there working,...when i pull trailer valvedown, or apply brakes from feet pedal I hear the air from firewall, behind that panel..Brakes doesnt seem as good
     
  5. Deere hunter

    Deere hunter Road Train Member

    1,394
    4,341
    Aug 5, 2017
    Shallowater Texas
    0
    Could be the airline back there going to the brake application gauge also. You're just gonna have to pull that panel and look.
     
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