The way the drl harness that comes with these headlights work is as soon as acc power is sensed on the fused you tapped into they turn on. Then are overridden when the parking lights are on.
So if you don't have drl's and only have parking lights it sounds like something on the drl harness isn't hooked up properly.
Off of the drl module, red to positive battery, black to negative battery and Grey to a keyed on fuse (I forget what one they recommend). Then on the other end each red wire gets connected to the corresponding headlight. If that's how you have it wired up check the fuse tap. If that looks good pull the Grey wire out and touch it to the positive terminal and see if they turn on. If they do then try another fuse. If they don't then it's possible that the drl module is bad
2018 2500 6.4L Hemi Tradesman
cutoutcummins. you were 100% spot on for whatever reason the F66 recommended by alpharex wasn't full power on ignition, so I moved to F93 and it worked. Thanks for your help man that was driving me crazy.