Yes in a simple answer these modules do fail.
Check the wiring very carefully from the A pillar to the door in the rubber grommet.
If you need a wiring diagram go to the VW Erwin website and pay for an hour for access to all the info.
Message Thread 
VW Touran AZV 2004 - No window or central locking function # - Brian Smith September 18, 2016, 8:12 pm
« Back to index | View thread »