Hi all, long time since the last post on this thread but I have some helpful info. The first picture/diagram is correct, but trying to read it on my phone was making my eyes bleed so here's the description. The description in post #5 does not match my VX.

First thing to note: there is no ground wire in the stock head unit harness. I de-pinned the ground from my aftermarket head unit and attached it to one of the mounts behind the radio.

I would recommend buying the Metra 70-7712 harness adapter (only $10). This way you don't have to hack up your harness in your car and rewire it - harness is short and it's a pain.

Wiring - as you look at the harness in the car with the clip facing up, these numbers correlate left to right:
Top row:
1 - Left Rear Positive - Red
2 - Right Rear Positive - Blue
3 - Illumination - Red/Green
4 - 12v Ignition/ACC - Red/Blue
5 - N/A
6 - Left Front Positive - Blue
7 - Right Front Positive - Green
Bottom row:
8 - Left Rear Negative - White
9 - Right Rear Negative - Blue/White
10 - N/A - (On the adapter this is the ground to de-pin and attach to chassis)
11 - Lighting - Green/Red
12 - Power Antenna - Orange
13 - N/A
14 - 12v Battery/Memory - Red/White
15 - Left Front Negative - Yellow
16 - Right Front Negative - Grey