does anyone know what pin controls the highbeam on the hood harness, all my lights work except the Right High Beam, checked fuses and they are all good, and I ran power straight to the headlight and it worked so I know it's not the actual light that's bad.
2017 Peterbilt 579 Headlight question
Discussion in 'Trucks [ Eighteen Wheelers ]' started by stark21, Oct 29, 2020.
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From chassis Node under drivers feet. Connector A pin 7 is hot to RH high beam. Pin 4 at chassis to hood connector.
Pay close attention to the hood harness as it wraps around the hood support and near the bug screen.pushbroom, QUALITYTRUCK and stark21 Thank this. -
ok thanks will check those pins out, I had one pin on the hood harness that looked kinda bad but sprayed them with some electric cleaner.. but it was pin 2 that was the one I thought was bad on hood harness.. thanks again..
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and by the chassis node do you mean the one that's in the battery box compartment I know that's where the aftertreatment control module is
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Chassis Node has 3 connectors A,B,C. Right beneith your feet under the cab.
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yep just found it, if I counted the pins correct it has power and nothing on the node looks bad or corroded. and nothing looks bad with hood harness pin 4. if I can't figure it out I guess I can just wire the one light via a switch inside to turn that on.. this truck is just been a pain.. just purchased and put in 30k worth of parts to fix.
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Connector A Pin 7 will not be hot when disconnected. Jumper power to pin 7 at the node. Check for power at pin 4 of the chassis side At the hood harness connector. If good follow up to the headlight. Do you know if your missing power or ground?
pushbroom Thanks this. -
ok will try doing jumper method in morning.. also I have had quite a few electrical issues so it could be a ground issue. where would be the ground for the hood harness be.
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Ground is white 9 & 10 chassis/hood.
pushbroom Thanks this. -
ok will check it out.. thanks again. I do know the pin 10 on my hood harness is empty no wires going to that one.
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