Marker lights don't work, turn signals do?

Jwtrucking7 · Apr 21, 2022

Fernando A said: ↑

I have a 2016 KW T680 i don’t have Brake lights or any lights..
Only thing working is signal lights on my Chassis
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You ever figure this out? I’m having the same issue this morning. Parking lights will not come on after keeping them on overnight lol. Same truck

Bakken_Truck_Salutations · Mar 30, 2024

bigNATURE said: ↑

Hello, I just did a delivery last night in Milwaukee and I had to unplug my pigtail to hook up the power to my crane, anywho, that may have something to do with why my marker lights on the side of my truck, the tail lights, and trailer marker lights won't work. They'll flash on and my voltage meter will jump down, then the lights will shut right back off, and my voltage meter will return to normal, or jump back down. THE TURN signals and brake lights will work and so do the 4-way flashers. And also my overhead marker lights will turn on.

I don't see any exposed wire, just got my tail lights rewired and covered really well,

first thing I'm going to do is replace my two switches that turn on the headlights and marker lights. The lights on the switches don't work anymore and that may be part of the culprit if not the whole culprit.

any ideas or suggestions?? ...

thanks in advance

[2009 387 Pete]
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I just fixed this one. After you've checked the fuses and swapped a couple of relays. Disconnect the Trailer Wire harness to isolate the tractor. Flip on the running lights if you have the same problem it's in the tractor. If you don't it's in the trailer. Visually inspect for damaged wire loom or exposed wires. Separate wires that look rough just to make sure they're not touching then check again. Follow it up with some wire tape as a field repair. I like to use liquid tape in a can. Your mother told me to tell you hello...

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