Like I said, the install doc doesn't really help. Here is what I figured out:
R Rear - = Pink wire
R Rear + = Blue
L Rear + = L Grn
L Rear - = Purple AND Pink (Why ? 'cause of the OEM amp ?)
R Front + = Pink
R Front - = Blue
L Front + = Purple
L Front - = L Grn
The red / grn wire from the Pathy is Ign Power ON. I used this one to power the pioneer. There is also a Pink / Blue wire that is 12 v all the time. I used this one for pioneer power on all the time. The Red wire from the Nissan is for the power ant.
I created my own ground with a solid lug to the chassis.
There are still three unknown wires, a gray, a pink / blk, and a pink / blue.
By using the fader and balance I am able to send sound to any of the 4 speakers so I figure this is good enough.