I need a Radio Guru?

[CJ]

The pink wire on the original connector is used for in initiating the power antenna IIRC...

CJ

[IrishPhoenix]

Yep, the pink wire corresponds to the aerial. Here is a guide off FTO owners club. Although the wires can be different depending on the way your old stereo was set up.

What do the different colour wires do?
These colours are as checked on '95 GPX. Double check power connections whenever possible with a multimeter. ISO harness adaptor is £7.95 inc VAT & carriage from Niche (01285-860865) PERMANENT 12 VOLTS RED/BLACK
ACCESSORY 12 VOLTS BLUE
ILLUMINATION GREEN/WHITE
EARTH 6mm NUT
ANTENNA TRIGGER PINK TO POWER UP THE REAR SCREEN ANTENNA
R/L+ SPEAKER YELLOW/BLUE
R/L- SPEAKER GREY/BLUE
R/R+ SPEAKER YELLOW/RED
R/R- SPEAKER GREY/RED
F/R+ SPEAKER WHITE/RED
F/R- SPEAKER BLACK/RED
F/L+ SPEAKER WHITE/BLUE
F/L- SPEAKER BLACK/BLUE