Top man I'll give it go, I take it the blue is ground? As I wired red and blue to +&- just to check it works and lights up but obviously just get a NO COMUNICATION ON THE DISLAY.
The blue, white, yellow all need to go into the 3 pin diagnostic port.
If you look at the plug so it has two pins at the top and one in the bottom it is wired as such:
TOP LEFT________TOP RIGHT
YELLOW___________BLUE
_____BOTTOM CENTRE______
_________WHITE___________