My driver door seems to be able to send the lock/open signal but not receive it.

If I use the key in the driver door it locks/opens all the other locks incl. deadlock but if I lock/open the car using any of the locks; passenger door, rear trunk/boot it simply doesn´t lock/unlock, same thing with the remote, all but the driver door react.. And of course at the first try of locking using the other locks or the remote, the GM immediately unlocks the system again!

All fuses are checked and good, front and rear. Syncronizing sequence doesn´t help any, neither manual or disconnecting the battery for 15 mins etc, rear harness is good and recently fixed!

Could it be that the microswitch is fecked so that the circuit is disconnected and it doesn´t receive the signal from the other locks? Or is it the actuator thats worn down?

Any ideas where to start?