[b3lha]

Assuming it works the same as the system on my Legacy, it should be easy:

There is a control wire running from a microswitch in the drivers door lock through to the control unit above the glove box. This wire tells the control unit whether the drivers door is locked or unlocked.

When the door is unlocked, the microswitch keeps this wire connected to ground. As you lock the door, the microswitch disconnects the ground from this wire. The control unit senses this and drives both driver and passenger lock motors into the locked position. When you subsequently unlock the door, the microswitch grounds the wire again, the control unit senses this and drives both lock motors into the unlocked position.

So, to lock the doors you simply have to momentarily break this wire, then the lock mechanism will move and the microswitch will keep the wire ungrounded.
Then to unlock them you have to momentarily ground the wire, then the lock mechanism will move and the microswitch will keep the wire grounded.

If you look at the diagram in the thread below, you can see the microswitch in the drivers door actuator.
http://www.subaru-svx.net/forum/show...2&postcount=14