Thunderbolt,
I realize this is a pretty old thread, but did you ever get this figured out?
If you have the round LED fixtures similar to what I have in my 2017 Landmark, you can pull straight down on the cover and it will snap right off. There is another style that threads off about a 1/4 turn. There are usually three screws that hold the fixture in place. Pull those and you can get to the wires.
I have a couple of lights that are flickering. I verified that the wiring is fine but the fixture has a few LED's that are not functioning properly.
My problem is, I can not find a replacement fixture.
Thanks,
Sherman