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2018 Peterbilt 579 Wiring Schematic Needed

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Thekenzieann, Dec 10, 2019.

Page 1 of 2
  1. Dec 10, 2019 #1
    Thekenzieann

    Thekenzieann Bobtail Member

    10
    3
    Dec 10, 2019
    Utah
    0
    Can anyone attach the schematic for the exterior lights on a 02/2018 Peterbilt 579??

    It would be greatly appreciated

    xx
     
    Thekenzieann, Dec 10, 2019
    Thekenzieann, Dec 10, 2019
    #1
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  3. Dec 10, 2019 #2
    buckeyetrucker

    buckeyetrucker Light Load Member

    157
    254
    Jan 11, 2009
    Ohio
    0
    Are you having fuse problems or headlight problems?
     
    buckeyetrucker, Dec 10, 2019
    buckeyetrucker, Dec 10, 2019
    #2
  4. Dec 10, 2019 #3
    pushbroom

    pushbroom Road Train Member

    1,780
    7,317
    Sep 1, 2012
    0
    What lights and what problem are you haveing?
    Also a serial number usually helps.
     
    pushbroom, Dec 10, 2019
    pushbroom, Dec 10, 2019
    #3
    spsauerland Thanks this.
  5. Dec 11, 2019 #4
    Thekenzieann

    Thekenzieann Bobtail Member

    10
    3
    Dec 10, 2019
    Utah
    0
    Aaaah yes a serial number ‍♀️ I can get that when I am near the truck again.

    My front marker lights on the trailer and marker lights on the headache rack intermittently don’t work. However the more I think about it the headache rack is aftermarket and I’ll probably have some luck looking at how that got spliced into the wiring.

    I appreciate the quick responses!
     
    Thekenzieann, Dec 11, 2019
    Thekenzieann, Dec 11, 2019
    #4
  7. Dec 11, 2019 #5
    buckeyetrucker

    buckeyetrucker Light Load Member

    157
    254
    Jan 11, 2009
    Ohio
    0
    I would have a dealer check the wiring harness from the chassis node to the front fuse box. I started blowing fuses and finally had lights go out with fuses not blowing. Evidently the 579 wiring harness is known for getting holes rubbed in wires when it goes over frame. It’s under warranty til 300000 miles. Mine was at 306 and I’m fighting with them over who’s gonna pay the 3000 dollar bill since it was obviously bad before 300000 and it’s a known problem.
     
    buckeyetrucker, Dec 11, 2019
    buckeyetrucker, Dec 11, 2019
    #5
  8. Dec 11, 2019 #6
    pushbroom

    pushbroom Road Train Member

    1,780
    7,317
    Sep 1, 2012
    0
    If its the trailer and the headache rack whoever installed the rack probably put a junction box in the trailer cord in the frame rail. Start there
     
    pushbroom, Dec 11, 2019
    pushbroom, Dec 11, 2019
    #6
    Thekenzieann and spsauerland Thank this.
  9. Feb 13, 2020 #8
    TNKYTRUCK

    TNKYTRUCK Bobtail Member

    1
    0
    Feb 13, 2020
    0
    Has anyone had trouble with 2017-2018 Peterbilt 579 ABS wiring harness? I have 11 of these 579s and almost everyone of them is having wiring problems. Paccar has only covered some of the issues under warranty/policy and now they won't help at all. I'm considering suing them over my downtime, tow bills, etc. They want to charge me over $6000 to replace this wiring harness.
     
    TNKYTRUCK, Feb 13, 2020
    TNKYTRUCK, Feb 13, 2020
    #8
  10. Feb 13, 2020 #8
    buckeyetrucker

    buckeyetrucker Light Load Member

    157
    254
    Jan 11, 2009
    Ohio
    0
    I just had to replace the harness from the chassis node to the fuse box because the way it’s set up, it runs over the frame and rubs a whole in it. Have you tried talking to one of their regional managers? They were going to charge me 2600 for my repair after they adjusted the bill a little. Got it covered by #####ing up a storm to the regional guy.
     
    buckeyetrucker, Feb 13, 2020
    buckeyetrucker, Feb 13, 2020
    #8
  11. Feb 14, 2020 #9
    spsauerland

    spsauerland Road Train Member

    4,296
    10,890
    May 31, 2010
    West Harrison, In
    0
    Yes, many problems from bad harness routing/improper securement. Not sure what is going on in Denton. Much better workmanship @KW in Chillicothe. He should of bought KW's @pushbroom!!!
     
    spsauerland, Feb 14, 2020
    spsauerland, Feb 14, 2020
    #9
  12. Feb 14, 2020 #10
    pushbroom

    pushbroom Road Train Member

    1,780
    7,317
    Sep 1, 2012
    0
    Loom to hockey tape was an issue. Harnesses were 1500$ but there was a different one for every truck. They amalgamated 100's of harnesses to simplify the part stocking and also the price shot up to 5g a harness. Recently they have gone back to loom. Should be as good as pre 2017.

    Id replace a harness every week if it meant i didnt have to drive a kw @spsauerland :)
     
    pushbroom, Feb 14, 2020
    pushbroom, Feb 14, 2020
    #10
    Goodysnap and spsauerland Thank this.
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