If you ever find yourself in a 2004ish Jeep Grand Cherokee and the interior lights won't turn off and the driver's side controls stop working, you have a broken power wire between the door and the rest of the vehicle.

Pull back the ribbed rubber that covers the wires. It helps to take the plastic connector out of the door, but chances are you'll break some brittle plastic tabs like I did. Still went back together though.

The power wire is red with a white stripe. It should be obviously broken. Fix that (soldering preferably, although the wire is pretty thick and it's a tight spot to solder in) and you should be good to go.