I prolly can't be of much help since I have the mach 460....but I think it should be yellow=acc power, red=power from battery, black=ground, then u have speaker colors, blue=remote power, blue with stripe=power antenna.
I can't remember the blue ones though, they might be switched up. I'm sure someone else will chime in on this.
what are u tryin to do exactly, add an aftermarket cd player and amp?
Ur ACC wire is what tells the stereo head to cut on when the key is in the accessory position, key on engine off. Again, i think this is the yellow one.
That is correct, yellow is your accessories wire (12V with ignition "on"), the red is 12V constant for the memory. The wire in position "I" (last one on the grey connector) is remote power to turn on the amp (yes, even the non-Mach 460 has an amp, I found that out the hard way, if you leave it disconnected as per the instructions, you will have no sound from the speakers). I forget exactly what color it is, but I think cbarr is right and its the blue wire.