2018 cascadia Jake don’t work

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by TNSquire, Sep 20, 2024.

  1. TNSquire

    TNSquire Medium Load Member

    Joined:
    Oct 13, 2016
    Messages:
    560
    Thanks Received:
    1,943
    Location:
    Decatur, TN
    0
    Selector button lights up when the steering wheel button is pressed, but there’s no Jake and no dash light…
    Shop said they looked, I’m not so sure.
    I do know I’m cooking brakes quick.
    What should i look at?
     
  2. Gridaxe5588

    Gridaxe5588 Light Load Member

    Joined:
    Nov 23, 2022
    Messages:
    113
    Thanks Received:
    154
    0
    Manual or Auto? Ours is a 2016 Auto and the dash buttons are for cruise the shifter pulls downward with 3 different Jake levels. Same light comes on for cruise (green engine) as for Jake, did they change it for 18?
     
  3. TNSquire

    TNSquire Medium Load Member

    Joined:
    Oct 13, 2016
    Messages:
    560
    Thanks Received:
    1,943
    Location:
    Decatur, TN
    0
    Auto.
    Cruise works normal
    On this one, right side bottom right button engages Jake. Dash button selects high/med/low.
    When toggling the wheel button, the selector lights up, but no indicator on dash and it’s not functioning.
     
  4. Gridaxe5588

    Gridaxe5588 Light Load Member

    Joined:
    Nov 23, 2022
    Messages:
    113
    Thanks Received:
    154
    0
    Try pulling down on shifter even the 2020 works that way
     
  5. TNSquire

    TNSquire Medium Load Member

    Joined:
    Oct 13, 2016
    Messages:
    560
    Thanks Received:
    1,943
    Location:
    Decatur, TN
    0
    Tried that, no go.
     
  6. Gridaxe5588

    Gridaxe5588 Light Load Member

    Joined:
    Nov 23, 2022
    Messages:
    113
    Thanks Received:
    154
    0
    That's all I got above my pay grade now lol
     
    TNSquire Thanks this.
  7. xsetra

    xsetra Road Train Member

    Joined:
    Aug 21, 2011
    Messages:
    5,109
    Thanks Received:
    6,972
    0
    Jake's might be turned off in computer.
     
  8. 062

    062 Road Train Member

    Joined:
    Oct 20, 2013
    Messages:
    6,201
    Thanks Received:
    33,404
    0
    Could be the dash switch or a bad jumper.
    Do all the other switches in that pack work?
     
  9. TNSquire

    TNSquire Medium Load Member

    Joined:
    Oct 13, 2016
    Messages:
    560
    Thanks Received:
    1,943
    Location:
    Decatur, TN
    0
    I believe so. It’s the only malfunction with anything on the dash and smart wheel controls.
    Strange thing is, the indicators are active, and except the idiot light and actual Jake brake not functioning, you’d think it should work.
    I politely informed dispatch that, unless that was fixed, i won’t be running that truck again.
    It’s specific to one load we run and, it’s just not safe to run through the hills of Kentucky and East Tennessee. That Jake is pretty important.