Octavia (2001) central locking - Big John
I am installing an alarm into my Octavia, its been difficult to do! I have suceeded after a major fight with the interior light circuit, there is no one point in the wiring to take a single wire to the alarm to say the doors are open etc. I had to attach a relay accross the light bulb (not from light to ground!)to then send 12V to the alarm unit, this bit now works fine.

I am now trying to interface into the central locking, this seems to be a setup of sensors (not switches) and two thick wires feeding the lock motors. A voltage pulse is sent down to operate the locks, I think this reverses polarity to undo. Anybody had any experience in interfacing these into an alarm system (two output wires one to pulse lock the other to pulse unlock). I presume the car setup will be the same accross other VW cars of the era (ie Golf iv, Leon etc..).