Aftertreatment Fuse Keeps Popping when I hit a bump.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Lookunderthetruck, Oct 15, 2021.

  1. Lookunderthetruck

    Lookunderthetruck Bobtail Member

    27
    8
    Nov 18, 2020
    0
    Hello-
    Fuse L8 (aftertreatment) keeps blowing whenever I hit a bump.
    I have not been able to find any skinned, or broken wires, etc. This seems like the obvious, or most likely cause, unless I've overlooked something.
    Any suggestions on where exactly I should be looking. Could the bump in the road (no pun intended!) be coincidence and it's actually a faulty component within the system overloading?
    Thanks in advance for any ideas on this.
    Should be simple, right? Not so much.
     
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  3. Lookunderthetruck

    Lookunderthetruck Bobtail Member

    27
    8
    Nov 18, 2020
    0
    Changed the wire harness to the pump. Now the fuse blows without hitting a bump.
    Heavyd- you're an electrical whisperer as far as I'm concerned- any ideas on this fuse?
    I don't have access to the Davie program so I'm going in a little (a lot) blind.
     
    Last edited: Oct 18, 2021
  4. Goodysnap

    Goodysnap Road Train Member

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    6,005
    Jul 12, 2017
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    Please share last 8 of VIN
     
  5. Lookunderthetruck

    Lookunderthetruck Bobtail Member

    27
    8
    Nov 18, 2020
    0
    Goodysnap! I didn't see this until now. It just so happens I've just reached out to you via a different post altogether. I'll get that VIN ASAP. I'm not with the truck now. Please disregard my reply to that other post. It was such a pleasant surprise seeing you here. Thanks!
     
    Last edited: Oct 18, 2021
    Goodysnap Thanks this.
  6. Lookunderthetruck

    Lookunderthetruck Bobtail Member

    27
    8
    Nov 18, 2020
    0
    Oops- I'll send it over to your email.
     
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