Have a problem with my door locks on my eb falcon, they wont stay locked. Wether i use the remote or key, they cycle but wont lock? The car starts/ runs fine. What could it be?

One of the actuators in the doors is playing up. To find out which one you need to disconnect each one in turn, while checking the central locking works on the other 3.

Thanks madmax. Theres my saturday arvo sorted,lol