I know there's a thread on door panel removal but it lacks quite a bit of information. I took the plunge today after being sick of having the dreaded passenger door rattle. Follow the standard procedure for removing the door panel.
1. Pull up on the rear of the switch trim-it locks in on the front so pull the rear straight up and it will come out.
2. Pull the deco trim straight away from the panel. The clips are terrible and I had to fix a number of them after pulling the trim piece off.
3. Remove the small plastic piece in the handle bucket.
4. Remove 8mm screws x5
---One in door handle bucket once plastic is removed
-----Two in the middle of the door panel once both pieces of trim are removed
-------Two in the bottom of the door panel-easily visible from below
5. Start at the bottom of the door panel with plastic trim removal tools and start popping the clips loose. The panel will pop loose easily.
Now I removed my entire panel. Most people say not too and now I know why. Without two people it is virtually impossible to remount the panel. If you can get to everything without fully removing the door panel then go that route.
Here are some pics for reference
Door panel so you know where the clips are when popping them loose:
Door with panel and water shield removed
Here was my fix
I had bought some extremely dense sound deadening foam for another project of mine and used some of it for this fix. I cut two strips about an inch wide and followed the metal the full length of where the harness runs. The harness was popped out of the retainers to attach the foam easier. Harness was replaced in the retainers. Then I sandwiched more foam between the harness and the metal of the window motor/mount to completely isolate the harness.
The rattle was so bad I couldn't stand listening to music but its gone now!