The fuse was blown surprisingly. And unfortunately they keep blowing. The one in it was rated at 10 amps which I presume is correct. I have checked my fakra cable and it is correct, apart from the two very similar green wires, however I think one of them is for the reverse and the other is from a speaker, so this being incorrect should not be an issue in getting the unit to turn on.
As soon as I plug in the fakra cable, without even the ignition being on, the fuse pops in front of my eyes.
So hopefully the fuse rating is incorrect, or I may have issues that I can't deal with. I'm still trying to run the unit in my boot, however my current headunit is disconnected so shouldnt be posing an issue.
Any more ideas? Cheers