Been scratching my head now with my low beams turn the switch all running lights work just fine no low beams flip the high beams on all lights work, check lights fuses all good. Replaced light switch on the dash nothing replaced multi switch on the steering column also nothing. Checked wires behind column switch just fine checked for power to ground and got 12v. Not sure if anyone else has had this or really where to go next.

 

Do all four come on when high beams are selected? Wonder if you low beam filaments aren't burnt out.....

 

all 4 do come on with the high beams I pulled the passenger side and also check the filament and I thought it looked alright, I thought it was weird if they both went out at the same time though

 

I also checks for power with the switch on and no high beams and there was no power to the bulbs

 

Switch controls the ground side of the circuit, power feed is directly to the bulbs..... I browsed thru the wiring diagrams, but I am just not seeing anything that would account for your symptoms...... Have the headlights EVER worked properly? I believe there are two different bulbs in each housing.....

 

yes all lights worked just fine then i noticed once i went to turn them on one day they stopped working, could you send me that diagram by chance?

 

Need to check it with a meter, I have seen bulbs "look" ok but fail the resistance/continuity test. You can find manuals here.

 

Check here. Download the Factory Service manual for your truck.