So I finally got my G35!!! It's a 2005 Red Coupe with sport suspension package. I love this thing!!! Anyway, here's the issue. The car had an aftermarket system added to the Bose factory stereo. I've installed many systems before but I hit a wall with this one maybe cuz of laziness. I removed the stock headunit and installed a Pioneer 8000BT I had from a previous vehicle. I sent three RCA pairs back and the base is working great. I wired the rear speakers straight from my amp and those are great too. The problem is the front door speakers and tweeters. I couldn't figure out how to send fresh wire to the doors because the weather protector looks tough to navigate. I decided to wire the front speakers by adding fresh wire from the amp to the wires that go from the Bose amp to the speakers. I tried using this color scheme for this:

Front Right + Gray/Silver
Front Right - Yellow/Silver

Front Left + Green/Silver
Front Left - Red/Silver

Problem is, I get very weak sound. It almost sound as if they're are only getting tweeter ranges. My question is, do the front door speakers here work like aftermarket components with a crossover box somewhere in the system or did the Bose amp take care of this from the back. If that's the case, do I need to split my signal coming from my amp? What color wires will I be using? Thanks for any help.

 

This should help you out:
http://www.psedog.com/cars/fsm/g35/coupe/2005/av.pdf

Thank psedog for hosting that.

 

^ Old school!

 

To answer that one, no, you do not need to split it. The door speaker and tweeter are fed from the same wires at the amp. They split further down the line.

Wire colors are in the previously mentioned and linked service manual.

 

Hey Wrath!

Thanks for the help and quick response! However, I have to sadly report...no dice! I actually think the woofers are blown cuz all I hear is tweeter range coming from both the door and the upper tweeter. I'm gonna have to test it out and get back to you. Just in case though, even though I'm pretty good at figuring out schematics, please verify my wiring. On the manual you linked (thanks again), on page labeled AV-AUDIO-07 I identified and wired correspondingly the following:
FL (+) Green
FL (-) Red
FR (+) Gray
FL (-) Yellow

 

OK! Thanks again for the help. Front woofers were blown. They weren't protected from the weather in the door. I installed a set of 5.25 Infinity Kappa's and they worked great. It was funny though, both door had green/red wires whereas in the back, they were green/red and gray/yellow.

 

Sorry I didn't catch the last post.

Good excuse to upgrade, anyway.

 

I always see, to be finding one!

 

Hope someone can help me I am trying to tap into my speaker wire
Before it is amplified . It can be any speakers
But would rather be the two in the back. I am trying
To get the signal from the speakers when it coming from the head unit not after it is amplified with the factory amp. It would be of much help if you could tell me which wires and around what location I can find them .. I don't want to mess with the head unit because it's to much for me at the moment if any one can help me out I would be real thankful

 

I will be using a high to low converter to get the signal from the speaker wire.