4th gen - Shifting in reverse makes driver locks flutter back and forth.

[Earthdigger]

I replaced my driver's rear lock actuator about a month ago. ( maybe this has something to do with it.)

I've noticed within the last couple of days that while shifting in reverse the locks flutter back and forth. I also notice that when I lock the doors, with the key fob, it doesn't make a beep most times and it doesn't turn the lights off with the second push of the key fob button.

 

[Earthdigger]

Curious if anybody has come across this?

 

[Nobody Special]

A lil off topic, but once I replaced stock spark plug wires w/ Magnecor KV85's on a 99 Land Rover D1 SD, the locks fluttered like you mention but when locking/unlocking.
I mention this as this is the first time I heard of door locks fluttering outside of my experience.