Sensors behind dash fl classic

Discussion in 'Trucks [ Eighteen Wheelers ]' started by ready2truck, Oct 2, 2021.

  1. Oct 2, 2021 #1
    ready2truck

    ready2truck Medium Load Member

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    Oct 27, 2020
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    Anybody know what this is?
    It's one main line coming into a brass t connector and two sensors screw into the t.
     

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    ready2truck, Oct 2, 2021
    ready2truck, Oct 2, 2021
    #1
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  3. Oct 3, 2021 #2
    Rideandrepair

    Rideandrepair Road Train Member

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    Aug 8, 2015
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    Look on each switch. You’ll see NC or NO. Followed by a part #. NC#### is the Low air pressure switch. ( Light and buzzer) Normally closed,( light and buzzer on ) once air builds up it opens at 65psi they both go off. Likewise if air drops, below 65lbs, they both go off to alert you of low air pressure. NO#### is brake switch. Normally open, hit brake pedal, or Trolley Bar, closes at 5lb pressure, Brake lights come on.
     
    Rideandrepair, Oct 3, 2021
    Rideandrepair, Oct 3, 2021
    #2
    little cat 500 and BoxCarKidd Thank this.
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