The first thing I though was related to a bad ground. However, if you look at pic 1, it indicates the ground for each door is at a different location.
So, the next thing would be power supply. The driver's door main switch ties all the others together via what is called a body control module. If the driver's lock always works, then I know it gets power which leads me to the body control module.
Before I would suggest replacing the body control module (BCM) I would perform what is called a CAN scan. CAN stands for computer area network. Basically, all of the control modules are tied together. This type of scan would help identify if the body control module is bad or not.
Here is a video that shows how it is done:
That is what really needs done to confirm. The BCM is not an inexpensive part and I would not want to recommend its replacement to find out I was wrong.
Let me know if this helps or if you have other questions.
Thursday, May 28th, 2020 AT 7:08 PM