red04svtcobra Posted September 19, 2008 Report Share Posted September 19, 2008 I have a 2004 Mustang Cobra with the Mach 1000 system and just bought the Avic Z-2 from a guy that had it installed in the same type car but me doesn't know anything about it because he paid someone to do it. My question is, what all do I need to do to istall this unit. BTW some of the wires on the back have been deleted or spliced into. Any help is greatly appreciated. Quote Link to post Share on other sites
red04svtcobra Posted September 19, 2008 Author Report Share Posted September 19, 2008 Ok no help huh. What about 1 installer says I need a 5521 harness only and the other says I need a 5521 and a soundgate LOCX part. Who is right? Quote Link to post Share on other sites
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