For ease of reference, the 8 way Molex 'tuner' connector is wired as follows:

1 - Pink - level
2 - Grey - signal
3 - Blue - Power Ant (not connected on wiring harness)
4 - Black - 0v
5 - Brown - TX
6 - Red - RX
7 - Purple - unknown (not used in PCATS tuner)
8 - Blue - 12v

If you are unsure of the numbering of the Molex connector, please check Patrick's tuner manual at http://www.pcats.co.uk/manual.html