Actuator for door locks
#2
Drifting
I ended up having to replace both the actuator and the brain module in the drivers door and I still could only get mine to unlock, not lock. My car stereo installer worked his magic on it and got it working. He said he sent voltage over from the other door somehow and that got it working again. Not sure if this helps but what got mine working. No codes so far either.
#3
The relays inside of the module often fail. There is one for lock and one for unlock. If you search YouTube there is a video that shows you how to fix it. Relays are inexpensive, under $5. If you can't DIY I have heard ABSfixer.com repairs them--but double check that.