I am having this issue with the drivers master switch where the FOB will not unlock the drivers only the other doors. It will not lock either only the other doors.
The way to fix this all the time is to disconnect the harness from the master window switch and its all working again....for a few days or hours.
What is causing this does anyone know?
I have cleaned the contact points and bought a new master swtch but no success.

 

Check the lock actuator in the driver's door. either it's not working or the linkage is sticking.

 

Could be a wire. I think the locks run through the BCM so the wires where they go through the jam get weak from constantly flexing. this happened to mine. Most of the wires that run my door have been repaired. 270000 miles thats alot of door opening and closing.

 

Yes. It's the most obvious place to look.

 

But the weird thing is when you pull the window harness connector out and put it back in again all works 100%???
I can hear the drivers door actuator whinning at times.
Other thing Ive noticed is both door courtesy lights go dead when this happens ( drivers door cannot unlock) until I pull the harness out and in...all works.

 

If I get a new actuator does left or right matter?

 

I think there is a broken wire inside it's insulation somewhere in the harness and every time you stretch and flex it, it makes contact for a while.