Wiring harness help

[Get_ARMED]

Long story short, vehicle came with one radio in it when I test drove it and somebody hacked up the wiring harness and shoved in another radio. Now I'm trying to fix the problem aftermarket double din and I need to salvage the current harness cuz I can drop the $150 for a new on. Anyone in the Chicagoland area that can give me a hand trying to figure out where I went wrong. As I have it the radio won't even turn on.

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[Happy Hummer]

Might be time to do some schematics following. The wiring does not need to be hacked as the aftermarket offers a nice connector for the H3. Of course if the PO cut the wires, that stinks. Even so the schematics for wiring will greatly help.