coil pack question

[mikeyclio172]

does anyone know what the three wire are on the coil pack are on my phase 1 172 engine, the colours are white,yellow and pink or is there a diagram

 

[neil a]

I can never mind what pair cylinder pins 1 and 2 are but I think its
Pin 1 is 2+4
Pin 2 is 1+3
Pin 3 is 12v
Pin 4 is blank