I don;t know if these were factory or installed after the truck was purchased but I have day time running lights on my truck and I hate them. They are not a seperate bulb, they are powered by low amperage to the high beam fillament. The question is how do I disconnent them?

 

There may be a DTR light fuse. if so pull the fuse. if not the DTR module is on the core support behind the grill. Its a large plug in connector that is attached to an aluminum finned module. It on the drivers side between the edge of the grill and the headlight.