Contunuining from above - here's my last annoying interjection!
This is a very helpful page for you.
http://clubgti.com/showthread.php?26719 ... dieselness!)
but i did a similar exercise to above and this is what i got
T6 - brown 6 pin connector, early: --
1 Black Ignition Live
2 pur/wht Fuel pump earth trigger
4 red/grn Permanent live ECU feed
5 blu/yel Switched or Fuel pump live for lamda heater, MAF, carbon canister etc.
T10 - orange 10 pin connector, early: --
1 gry/wht Diagnostics K line
9 grn/brn Rev output
T10w - white or T10d - green 10 pin connector --
2 org/blk to vag-com port
3 org/brn to vag-com port
T10a - 10-pin connector: --
1 blk Oil pressure - or use your own
4 pur Coolant temp sensor - or use your own
5 red/pur Switched or Fuel pump live for injectors
6 yel/blk Switched or Fuel pump live for other sensors on engine.
7 brn Coilpack earth
9 brn/wht Earth for dash temp sender
The blue connector is for the pedal and doesn't need touching
The rest is irrelevant!