Can anyone attach the schematic for the exterior lights on a 02/2018 Peterbilt 579??
It would be greatly appreciated
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2018 Peterbilt 579 Wiring Schematic Needed
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Thekenzieann, Dec 10, 2019.
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What lights and what problem are you haveing?
Also a serial number usually helps.spsauerland Thanks this. -
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! -
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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
Thekenzieann and spsauerland Thank this. -
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.
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Id replace a harness every week if it meant i didnt have to drive a kw @spsauerlandGoodysnap and spsauerland Thank this.
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