I have a 95 mustang with the mach 460. I put 2 10's in my car and i decided to use the factory head unit but it doesnt have rca jacks so you need a rca adapter thingamabob. But if you tap into your rear speakers all of your amps will be disabled. The Mach 460 is set up to shut down if any aftermarket stereo's are put in. Get you one of these adapters and YOU HAVE TO HAVE A SEPERATE AMP FOR YOUR SUB. Turn the bass up on the amp and turn it low on the adapter that way the factory system doesnt think you are drawing off of it. Let me know if you have any other questions.
WIRING INFORMATION - FORD / MUSTANG / 1999 / COBRA / AUDIO
Radio 12 Volt (Constant) = Purple/Light Blue At Radio Harness
Radio Ground = Black/Light Green And Black At Radio Harness
Radio Ignition = Black/Pink At Radio Harness
Radio Illumination = Light Blue/Red (Dimmer) At Radio Harness
Left Front Speaker +/- = Orange/Light Green - Light Blue/White At Radio Harness
Rear Front Speaker +/- = White/Light Green - Green/Orange At Radio Harness
Left Rear Speaker +/- = Gray/Light Blue - Tan/Yellow At Radio Harness
Rear Right Speaker +/- = Orange/Red - Brown/Pink At Radio Harness
Those should be all the colors you need and they are on the back of the radio in the factory harness. Use military splice or 3M scotch locks to tap into the wires you need.
For subwoofers you should only need either the Left Rear or Rear Right +/- and the radio ignition for the remote wire to the amplifier which is black with pink strip.
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