Welcome to 2CarPros.
When you say you check the lights out of the truck, they work, but then don't work when plugged into the truck, I'm not sure what you mean. How are you testing them? Is it only the cluster lights which are the issue?
I went through a few wiring schematics on this vehicle. Power is supplied via the body control module (BCM). See Picture 1. I circled the supply (red wire) and the dimming circuit.
Now, the one common thread I see is ground location. I need you to check the grounds. See Picture 2 for color and location.
Check these and let me know what you find.
Images (Click to enlarge)
Monday, July 8th, 2019 AT 10:03 PM