diagnosing door lock actuator

[Perrier]

trying to figure out if the actuator or wiring or GM or something else is causing the issue. please chime in with your experience and thoughts.

Rear right actuator, makes a faint noise like it's trying to do something however the result is
When locking door (central locking or key fob) the actuator unlocks
When unlocking it unlocks
When using key fob, it unlocks on first click (along with driver door) passenger doors should wait for double clicks to unlock

not sure if it is the actuator itself or GM

the actuator plug has 7 pins, labelled 1 2 4 5 6 7 8 don't know which is ground or expected function and voltage of each, so it's getting difficult to diagnose

any thoughts or experience please share.

Thanks.