Which Door ??

[Patrick-Irish]

I think one of my door actuators is shot, but how do I find out which one ?

The symptoms: the car is constantly reporting an open door; the auto window up and down isn't working which I believe is normal if a door is open; the interior lights are staying on permanently if all the doors are closed and the car is not locked; if I do lock the car the alarm goes off after a while because it thinks a door is open.

Seems clear a switch or something inside one of the actuators is gone south, but how do I find out which one ??