1994 Ford Falcon ED Classic Stereo

Does any of u guys know the wiring colors of the falcons. cause me dad has a 94 ED falcon and he wanna put a new Head Unit. nothign special. just so they can listen to CD's instead of tapes.

the problem is. what wires are which. on the wire harness. there is black wire for ground, wheres the power(red wire) also can u guys tell me what are the other colours and what are they.

thanks guys

sumtimes the positive wire is blue