Most wires are available in the main loom under the glovebox,but indicators can be found at the hazard switch,the door switch wires either up the A pillar,or at the light itself,and the central locking at the loom coming out of the passengers door,I THINK it's a thin purple wire which if you cut it whilst the car is locked,it should then unlock.If you connect the car side of the wire(not the door side)to ground,it should now lock,Hope this helps.This applies to earlier 206s,I haven't done any with multiplex wirinh though.
Chris@Imagewerx, March 2005