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WIRING INFORMATION - FORD / MUSTANG / 1999 / COBRA / AUDIO
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Radio
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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
Speakers
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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.
Here is a wiring diagram pdf.
Everyone is telling me to rewire all the speakers as using the amps in the older models is weak, can damage aftermarket HU's internal amp, and hurt speakers.
Last edited by pcfrisch; 03-03-2009 at 10:10 AM.
Reason: Removed link and added file
1994 Ford Mustang Stereo WiringConstant 12V+Light Green/Yellow Switched 12V+Yellow/Black GroundBlack IlluminationLight Blue/Red Dimmern/a Amplifier RemoteDark Blue AntennaRight Front Front Speakers5" x 7" DoorsLeft Front (+)Orange/Light Green Left Front (-)Light Blue/White Right Front (+)White/Light Green Right Front (-)Dark Green/Orange Rear Speakers5" x 7" Rear DeckLeft Rear (+)Gray/Light Blue Left Rear (-)Tan/Yellow Right Rear (+)Orange/Red Right Rear (-)Brown/Pink
source:Car Alarm, Car Stereo, Mobile Video, and Cruise Control Info for Installers
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"Life's journey in not to arrive at the grave safely in a well preserved body, but rather to slide in sideways, thoroughly used up, totally worn out, screaming "That was one hell of a ride!"
my 01 mustange gt i just bought it the radio turns on and functions correctly but im not getting any sound out of the speakers and may mention its all factory. can anyone tell me where to begin looking.. thanks
Well for starters the wires that are at the radio are not the speaker wire, they are power, ground and data wires. The speaker wires are back at the factory tuner box in the drivers rear of the trunk behind the carpet.
This is my first post and hope this is the right spot for this ? I tried to find answer but coudn't open the wiredoc site. Heres my question.
I have an 07 gt with the shaker 500. I have a nice amp and a 10 woofer I would like to put in trunk. Is this an easy or hard process. Is the shaker 500 amp in the trunk already, if so, can I just use the power and ground from the factory amp for my amp and 10? Hope this makes sense. If its out of my league, thats fine but was just wondering how tough it is too add ur own amp and box, thanks, Drew
Speaker Wiring/harness diagrams Only please 
07 mustang amp ? 
