The other doors behaved the same with respect to the lock button when using the key fob to open or close. But, using the key in the door and unlocking worked every time and moved the inside button fully. Double key unlock would unlock all the inside doors every time. Key in the door also locked all the doors every time. Central locking problem. My mother in law has a 2009 Chevrolet Lacetti and her central locking isn't working. If you press the key fob the blinkers flash but door lock does not function. when using the key to lock/unlock door/s only the drivers door locks/unlocks. I've checked the fuses and they look fine, I've also tried the 'putting the key Two microswitches (red and blue arrows) are used to detect if the key is being turned in the driver's handle to lock/unlock the doors and open/close the windows and sunroof. A third microswitch (yellow arrow) is used to monitor the state of the locking mechanism, i.e., whether the door is locked or unlocked. The central locking systm on our 1995 eurovan keeps locking and unlocking when you unlock & open the driver's door. This doesn't happen when you unlock the slidng door as long as the driver door remains locked. It's driving us crazy! It started off as an intermittent problem when we bought the van 5 years ago but recently has gotten worse. Cd7W.

central locking keeps locking and unlocking