If it helps DMiller, I recently fixed mine and didn't know where to start. I did a lot of reading on here so I understand how it's a little tough to sort through everything you find relating to this.
Based on my experiences, here's my opinion.
First, take off the access panel and unplug the window motor connector. You'll find it toward the center at the bottom inside the access panel. It should have a red and and yellow wire. I took a long jump from my batter to the back of the vehicle and got comfy inside. If you take the wires and touch them to the motor wires (red to red and black to yellow) it will make the motor move one direction (red to yellow and black to red) and in reverse the other direction. I don't remember which is which.... This will tell you whether or not the motor is working. From all of my research... it usually is!
Next, if that tests okay... the window is controllable like this, you've just eliminated the motor and the assembly that lifts and lowers the window. If the motor doesn't work, it's only 3 bolts holding it in place... tight getting your hand in there but very do-able.
If your motor works, it's just a matter of tracing down the issue from there. It will be either the door not closing properly, the wiring having a short, a bad switch at the dash or a fuse. Mine was the door not closing all the way. The previous owner thought the window was broken but just hadn't closed the back door all the way. Score. Regardless, inspect the harness and fix any oddities while you're in there. While troubleshooting mine I was also able to re-solder a connection for the deforst and fix that, too.
Once you know your motor works, though... then start searching on here for great switch and harness troubleshooting techniques... there's a lot of info so it's a bit menacing finding something that speaks properly to you... but it's there! I hope my tip with testing the motor helps.