After Market Head Unit, Speakers, 2 Subs, and 1 Sub amp
 

I installed all this but still need to figure out how to connect the 4 Speaker Outs of a 4 Channel Amp to the OEM speaker harness so I can unplug the stock Alpine amp.

What the X had: NAV, no subs, no DSP.

Here's what I did, hope it helps someone:

Installed a Pioneer FX-700BT in dash with a Metra dash kit, looks only "OK".

Ran the 12 wires Head Unit to the Radio Module under the spare tire.

Unplugged harness to Radio Module and connected a Metra 70-8590 wiring harness (bullet connectors).

Connected all 4 speakers (8 wires), amp remote signal, 12v switched, 12v battery, and ground from Head Unit > Metra Harness > OEM Harness.

Connected the Sub Amp to the RCA cable from the Head Unit and tapped into the Remote Signal from the Metra harness under the spare tire. 12v and Ground is right there, take your pick.

Wires from Head Unit to Radio Module stock wiring and door speakers::

Pioneer > Radio Module > At Doors
LF - White/Black > Brown/Orange > Blue/White
LF + White > Yellow/Red > Blue/Brown
LR - Green/Black > Brown/Orange > Brown
LR + Green > Yellow/Black > Yellow
RF - Grey/Black > Brown/Orange > Blue/White
RF + Grey > Blue/Red > Blue/Brown
RR - Purple/Black > Brown/Orange > Brown
RR + Purple > Blue/Black > Yellow

I unplugged the factory amp on the driver side under the NAV DVD and CD Changer because I want to use the Head Unit's built-in amp or a 4 channel separate Amp, but the speakers would not work. Plugging the factory amp back in fixed this. I found on this site that the high level output of the Head Unit doesn't hurt the stock Alpine amp.

The 2 Rear speakers BOTH use Yellow and Brown and the 2 Front speakers BOTH use Blue/White and Blue/Brown- how can they use the same color codes?!?!? A continuity test from the door plugs to the amp harness showed that each speaker wire at the door connected to several pins on the amp harness- I don't understand how this all works.

This post shows that you can just tap into the OEM harness at the Amp, but it doesn't say which wires are for LF+ LF- LR+ LR- RF+ RF- RR+ RR-. That's what I'm trying to figure out:

http://www.xoutpost.com/electronics/...tall-pics.html

If anyone has the answer, please post it! Thank you in advance.

BTW: it sounds pretty damn good already ;)