Hi Carl
Thanks for the questions, I try and sum up the issue you are having.
- Passenger side LEDs are not working. Then pigtail adapter on the passenger side is missing, and there is a pin missing from that headlight. Does it look melted or someone snipped it off?
Questions for you.
Does the turn signal work on the passenger side headlight? It is a LED, it should not work if the LED controller is missing. Let me know.
Also, no LED DRLs (u shaped LEDs) even when the low beams are off?
My Comments
I think the issue is the missing pin, it is the main ground for the headlight, so if there is no ground, the lights will not work properly. As well, probably in the past, they thought there maybe a problem with the headlight, either the pin and some internal wiring melted, or they remove the pigtail connector on that side, and removed the pin for some weird reason, thus making the headlight not functional…
The purpose of the pigtail adapter was optional, it was meant to keep the LED DRLs on with the low beams, without it, they turn off when the low beams are on.
The resistor you mentioned, is circled in yellow. You can unplug it from one side and plug it into the other side ands see if that makes any difference, but I feel without the ground pin, it probably wont work. I think your best option is to pry off the headlight connector, and see if there is any melted wiring, and to replace the pin. You can cut and solder on a pin and wire from the pigtail connector. See if that solves the problem for you.
You can also check if you are getting power to pin 4, which is the LED DRLs with a multimeter.
Hope that helps.
Ed