Cigarette lighter failed

[lewiswm]

Cigarette lighter has never worked on the VI I bought a while ago.

Had a look at the wiring at the back of it and noticed 3 wires.

I am electronically minded, but are there any common faults and which wire goes to what?

Thanks in advance

 

[McFall1984]

what colour are the wires?
funny ive my panel off the evo an i'd to remove the wires