Central locking not locking doors.

[Jb95]

I have just changed my tail lights to the hella smoked ones and since then, my central locking will not lock or unlock the doors. (4 door model)
I can still lock them manually from inside and the two front doors with the key. The fob does beep as if it’s locked, but the doors don’t lock, then when I press it again to unlock, where it would usually beep twice, it now beeps 4 times. Even the alarm goes off if I open the doors while they are supposed to be locked. I didn’t touch the door locking actuators in the boot so I have no clue what else could be wrong. Has anyone has this issue before?

[dylan8]

After market or "genuine" keyless entry?