The exterior lights have power, but I cannot control them?

These are controlled by the BCM, but we should check the fuses first. This guide can help, and I have included the fuse locations as well:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If the fuses are okay, we can confirm the BCM issue by doing a CAN scan. You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Here is the location and how to change out the BCM, you can get a preprogrammed unit by searching Google or Ebay. Check out the images (below). Please let us know how it goes.