Alright, dude don't bother with all those wires in the back.
Checking the pairs to see what works with what wont work because youre not getting all the sound from the speakers. The other two wires that arent for the speaker are for the tweeters. and any of the pairs will give you sound from the speaker but not full audio.
I tried using the old but it sounded like crap, (especially with my Eclipse HU) so i decided to re-run the wire (to the rear'* at least i still need to do the fronts, damn door panels)
So what you do is pull out your HU and disconnect your harness, at the harness that connects to you car (NOT RADIO
) pull the leads & pins out of the harness, cut them and connect them to the appropriate speaker and run the wire.
TRUST ME. I just did this with no difficulty and got twice as good sound because the previous owner of my car blew everything and put in some **** speakers but now that they are hooked up correctly they sound twice as good.
OH and do you have subs? just curious if you have any more Q'*?