CCM & wiring, repair.
I suggest you completely unwrap all of the CCM harness and pull the wires apart to find the splices, any corroded splices need
to be cut back, soldered, and covered with marine grade heat shrink tubing. (You might need to add short wires to replace what you cut out)
Also check ground connections (1 on floor and on "A" Pillar), and check CCM/TCM and "A" Pillar connectors.
Have a good look at this link, before you start. (Note: This is a UK car, the CCM is always on the LHS)
This thread attempts to bring together all the problems regarding water ingress and their solutions.
Water Ingress and Solutions
Rear Door Regulator Panel
Door open switch not working, Re-solder all connections on the door lock PCB. The red wire and blue wire go to the door open switch.
Front Door Lock (Rear doors are similar)
You should lower the window into the service position (2"-3" open) before you disconnect the battery.
No need to remove the window completely, just tape it up securely. (Put paper/plastic over top of door to protect paint)
Door Lock Mechanism Repair (With Pics) (Modified copy from www.taligentx.com)
Also check the wiring and connectors between the doors and pillars.
All Doors.
Additional information on the "puddle light/door open switch".
Also check the wiring and connectors in the boots between the doors and pillars, and all ground connections.
I suggest you completely unwrap all of the CCM harness and pull the wires apart to find the splices, any corroded splices need
to be cut back, soldered, and covered with marine grade heat shrink tubing. (You might need to add short wires to replace what you cut out)
Also check ground connections (1 on floor and on "A" Pillar), and check CCM/TCM and "A" Pillar connectors.
Have a good look at this link, before you start. (Note: This is a UK car, the CCM is always on the LHS)
This thread attempts to bring together all the problems regarding water ingress and their solutions.
Water Ingress and Solutions
Rear Door Regulator Panel
Another look at the dreaded wet footwell.
After reading many threads I thought I would offer another view on the flooded footwell. From the advice of these forums I had gone through the routine of making sure the drains are clear and the cabin filter is installed correctly. several months ago after some heavy rain left my footweel...
www.passatworld.com
Door open switch not working, Re-solder all connections on the door lock PCB. The red wire and blue wire go to the door open switch.
Front Door Lock (Rear doors are similar)
You should lower the window into the service position (2"-3" open) before you disconnect the battery.
No need to remove the window completely, just tape it up securely. (Put paper/plastic over top of door to protect paint)
Door Lock Mechanism Repair (With Pics) (Modified copy from www.taligentx.com)
All Doors.
Additional information on the "puddle light/door open switch".
Stupid door Switch!! $3 Fix!!!
I have my drivers door all tore apart. I am trying to fix my door switch. The one that tells you if the door is open or not and turns on the interior lights and the door light on the door. I have determined that the little switch that does this is bad since it fell apart when I removed the lock...
forums.tdiclub.com
Also check the wiring and connectors in the boots between the doors and pillars, and all ground connections.