Wiring diagram for driver window Master controller needed?

Thanks for the suggestion of a circuit light tester. It's a helpful tool. I verified that I do have power to the door with the tester. In addition to the main power feed to the door, I also verified that the DDM had power. I backed out the boot from the body and door and looked at the first inch of wire each side. I wasn't able to see any worn, damaged or broken wires. I also verified the 25A CB fuse was good. I've included a pic of my fuses as well as an image of the diagram. In the fuse block diagram image, a slash indicates that a fuse is unbroken but no active circuit. The X on the diagram indicates that relay does not exist in my fuse block. My plan is to work on it this weekend and remove the large wrap and chase the wires. The diagrams / schematics provided don't seem to fit with the 2007 GMC Sierra Classic. Maybe there are different diagrams / schematics for the 2006 GMC Sierra 4.8 2WD. If so, I'd be very grateful if they were posted. Thanks for the support.

Thanks for the responses. I found the issue where the ground and speaker wire had become completely severed in the boot between the body and door. Three other wires were exposed as well. I soldered and sleeved with heat shrink. All works great now. Thanks!