I believe I now have the correct wiring for both old (CDT) and new (CDTI) fan control in these images.
Many apologies for the earlier mistakes.
"New" CDTI fan and control wiring
https://www.facebook.com/photo.php?f...9970030&type=3
"old" CDT fan and control wiring
https://www.facebook.com/photo.php?f...9970030&type=3
Anyway, as far as I can see, the only difference between the old and new setup is the forth connector with the grey wire is on the PCB connector, whereas on the old control box the grey is crimped in with the brown blue connector on the PCB.
I seem to remember a reference to this in one of Arctic's postings, so I will try to find that and see if I understand any more than now.
Best regards, Frank B