You've lost the permenant feed for the clock, stereo, fuel computer etc hence why they won't power up.

Check fuse 2, and change it anyway, fuses aren't always obvious to see when they have blown.

The wire colours:

Red = Permenant 12v
Yellow = Switched 12v
Brown = Earth
Grey/Yellow = Illumination
Red/White = Electric antenna feed (for your aerial box) Blue wire on ISO plug