I realized it's not a diagram but [MENTION=35416]marlinsfan[/MENTION] sent me the below info in a PM and it worked for me:
The wires are not labeled at all, at least not that I could see. Antman has a wiring diagram somewhere here. The rear wires are as follows behind the HU:
Red Right Rear +
White Right Rear -
Black Left Rear +
Yellow Left Rear -
Purple Front Left +
Pink Front Left -
Green Front Right (I think positive)
Blue Front Right (I think negative)
For the green and blue wires, I can't remember exactly which one is positive and which one is negative. Look for Antman's diagram. Also, be very careful. There are 2 plugs coming out of the HU that have green and blue wires. Use the smaller plug. The large plugs have very thin wires. I don't know what those are for, but they are not speaker wires.
To keep the the HU powering the dash and tailgate speakers, you'll need to cut the wires at the doors and not behind the HU. The HU wires groups the frong dash and door speakers into one set of wires, and the rear door and tailgate in anotehr set of wires. If you cut there, you sever the direct connection to the dash and tail. You'll have to find the wires at the doors instead of behind the HU.
In my case, I use the LOC that has female RCA plugs on one end and speaker wire on the other. From the LOC (which I left behind the HU) I ran 10 foot RCA cables under the center console to the amp under the seat. That's why I had to remove the center console. Also, you will need to connect the amp remote turn on wire to something so that the amp turns on. I chose to connect it to the cigarette lighter that's inside the armrest in the center console. I tapped the positive wire.
As for the speaker wires, I ran new wires to the front component speakers, but I used the existing wires for the rear door and tailgate speakers.