G35 Sedan Wiring Harness Bose Stock amp + Aftermarket HU

[nas77]

Hey I got a couple questions I'm hoping I can get answered;

Been doing some research on the stock Bose Audio setup in my 2005 G35X; I have an aftermarket Sony double din head unit (DVD/MP3/USB) and the factory pop out GPS.

Question #1. I am currently using the basic wiring harness (for your regular Nissan/Infiniti deck hook up), just wires no RCA's, to my Sony double din head unit, speakers seem to be powered just fine, but using just the basic wiring harness am I not making use of the factory Bose amplifier located in the trunk? I figure that if the speakers are working that the amp must be on or am I mistaken? I am pretty much a stereo wizard but every time across a wiring harness on the web they have the RCA hook up's. Just wondering if I switch the harness to the one with RCA's (Metra or equivalent) will it give me better sound? Or will it not work with the Sedan for some reason?

Question #2. I have the stock Infiniti pop out navigation system, I have located the wires for the GPS Voice, from what I have read I will have to run those wires to the rear amplifier to bump up the volume. When I hooked up them up to the front left speaker via wiring harness to the Sony HU, it was barely coming through with the windows up. I know that these wires are very low current but just want to make sure this will solve my problem before I tear the console and everything apart again.

PS. Anyone looking for a great steering wheel control module, go with the Axxess Interface setup, works great relatively easy install and automatically detects your vehicle and controls.

Thanks in advance for your response!

[audtatious]

You could have used a PAC ROEM-NIS1 to install the Sony radio and you would not have any problems as it connects to the factory wiring.