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    2002 Mustang GT - Installing Sony Head Unit to Mach 1000 System

    I did exactly that and it works great! I almost connected it to the solid blue wire but realized that's for the antenna before doing that. I also started with 2 resistors on the 2 wires from the Metra harness side, but instead put a single resistor on the blue/white wire from the main harness...
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    2002 Mustang GT - Installing Sony Head Unit to Mach 1000 System

    I've gotten pretty far with this but I need some advice. I have the Metra 70-5519 harness I need with 2 RCA plugs, 2 black wires, and 2 blue wires. Here are my questions: 1. I learned that the 2 blue and 2 black wires on the Metra harness are to activate the amp, but what should I connect...