379 front clearance lights not working

Work back from the lights and disconnect harness plugs as you find them. Head lights off, one turn signal and other lights on. The turn signal power is for testing your test light as you work back to find power then work forward to find open circuit. Also make sure the bulbs are grounded.

 

Hi Bdog, I went out to my 06 Pete 379 and checked my fuses, should be the same as yours, and I pulled the circuit breaker on the one that says 20 amp tail/stop lht, while my turn signal lamps were illuminated and they turned off. The cab lights still worked, but rear marker lights had quit too. I think you might want to check that circuit breaker. So on mine that circuit breaker ran the rear marker lamps and the two turn signal clearance lamps up front. Hope this helps.

 

I've got a 99 peterbilt 379exhd doing same freakin thing. All marker lights work but ones on headlights. Fuses fine and relays fine. Turn signals work perfect just no running lights beside headlights. Pulled headlights out checked wires and installed led turn signals. Just clear turn signals. Had yellow led turn signals on before and had same problem. They worked fine on turn signals but no marking lights on them.

 

Trace the wires back from the headlights. They go to a connector under the radiator then back to the firewall

They tend to get pinched around the hood hinges

 

I have been fighting this on a 2001 379.
I found it to be 2 bad relays on one side each and the flasher relay for the LEDs. The LED one had a burnt wire end. The headlights would be on but low beam one side both on other. Swapped 3 relays and now high beam..low beam..and running lights. Funny thing is now my running lights come on with headlights or with clearance lights. Didnt before. I'll take that since everything else works fine so fa..r it's a pete so I'll await the next issue.

 

Why would anyone mount clearance lights on their headlight housing? Thats pretty weird

 

What are you talking about? If it's my post it clearly says with running lights or clearance lights but never insinuated that they were the same or same location...

 

I think he's talking about the OP. Clearance lights are on the roof, marker lights are with the turn signals...