I did have that problem, I lost all power to my passenger side rear door. After this very helpful guy on here I found the problem and have since fixed my problem. On my front passenger front door control module there is a purple wire on pin 8 that goes to pin 21 on the rear passenger door control module. It's the communication wire to the rear door. My wire was bad from beside the front seat to the rear door control module. So I ran a new wire from there into the door and it now works.