Ford Mustang Forum - View Single Post - Wiring after market head units advice/help in 03 GT /w Mach 460.
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post #2 of (permalink) Old 10-05-2012
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Joined: Dec 2008
Location: NJ
Posts: 23
I have an 03 GT as well, and all I did was buy the aftermarket harness's and they plugged right into the factory ones and went to the back of my headunit. I don't think that will help you much, but I figured I would let you know. Be careful when upgrading your front speakers w/ the factory amps though, because my front speakers cut in and out all of the time because the factory amps don't put out enough power for everything.

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