Problems with locking my truck

Good afternoon TacomaWorld!

I come to you with a (hopefully) simple problem. I drive a 2007 Double Cab Tacoma.

Whenever I try to lock my Tacoma with the driver door panel, it doesn't lock my driver side door or the door behind the passenger. It locks the other two fine. Same thing happens when I lock using my remote; the driver door and rear passenger door doesn't lock.

How can I fix this? I am not remotely experienced with wiring but there is definitely an issue.

 

I'd start with:

remove door panel

get a multimeter inside the door on the lock acutator and see if it's getting volts when
instructed to lock

 

Looking at the electrical prints all of the door lock signals come from the body ECU ACT+ and ACT- for all door except the drivers door that goes to ACTD on the body ECU return. Since two doors are locking fine it couldn't be a fuse as they all come from one 20A fuse source.

The logical points of failure would be either the actuators themselves or a broken wire.