XC60 2010 CCM problems caused by water ingress

[Harry28]

Hi all, I have a 2010 XC60 135000miles.

I have recently had a bit of a water ingress from a leaky windscreen seal, I've had that replaced but unfortunately it's managed to do a bit of damage to what I thought was my climate control module. It popped up with about 16 errors when reading the codes. I have lights on the CCM but I can't control the temperature, fan speed, heated seats or rear defroster.

I bought the same model number CCM from eBay and replaced it, I can now adjust the fan speed slightly but it doesn't get very high, the heated seats, temp control and rear defroster still don't work.

I read the DTCs using Vida and it popped up with:

CCM-B103287 Right Front Seat Heater - Bus Signal / Message Failures - Missing message
CCM-B105A11 Cabin Temperature Sensor Fan - General Electrical Failures - Circuit short to ground
CCM-B108187 Left Temperature Damper Motor - Bus Signal / Message Failures - Missing message
CCM-B108287 Right Temperature Damper Motor - Bus Signal / Message Failures - Missing message
CCM-B108387 Recirculation Damper Motor - Bus Signal / Message Failures - Missing message
CCM-B108587 Defroster Damper Motor - Bus Signal / Message Failures - Missing message
CCM-B108687 Air Distribution Damper Motor - Bus Signal / Message Failures - Missing message
CCM-B128687 Interior Mirror - Bus Signal / Message Failures - Missing message
CCM-B1A6987 Humidity Sensor - Bus Signal / Message Failures - Missing message
CCM-B103087 Left Front Seat Heater - Bus Signal / Message Failures - Missing message
CCM-B10874A LIN Bus A - System Internal Failures - Incorrect component installed
CCM-B108788 LIN Bus A - Bus Signal / Message Failures - Bus off
CCM-B10884A LIN Bus B - System Internal Failures - Incorrect component installed
CCM-B108&88 LIN Bus B - Bus Signal / Message Failures - Bus off
CCM-B10B913 Blower Control - General Electrical Failures - Circuit open
CCM-B10B911 Blower Control - General Electrical Failures - Circuit short to ground

I think there must be a short somewhere in the system but I don't know where to start looking. Has anyone had any similar problems and symptoms?

Any help would be greatly appreciated