It sounds like the BCM is out. here is the location and how you replace it in the diagrams below. Also I have included the wiring diagrams for the lighting system as well so you can see how the system works.
Body Control Module - DB4G67560B - $152.84
Please check the fuses before you begin.
Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
Images (Click to enlarge)
Wednesday, November 27th, 2019 AT 3:14 PM