if you take off the drivers door card and peel back the plastic sheet. (the sticky stuff they use is a **** so avoid it! ) follow the cables (3) from the lock to the first plug on the door. this plug is pretty much inline with the side bolster when door is closed(just for reference) unplug this and put one end of a volt meter on the centre wire (black) and the other on either the left or right blue ones. this should lock or unlock the door.
think thats right..doin it from memory as in work at the mo. will try and take pics tomorrow if i can