There won't be power to any wires on the headlight switch, grounds only to the BCM. I would go ahead and check all of the fuses in the under hood and BCM fuse panels. You can check out the wiring diagrams above to see which fuses need to be tested. If everything is okay the BCM is out. Here is how to replace it in the diagrams below. You can get a rebuilt unit by searching Google or Ebay. Check the grounds and power wires to the BCM as well. Check out the images (below). Let us know what happens and please upload pictures or videos of the problem.
Images (Click to make bigger)
Thursday, October 27th, 2022 AT 10:46 AM