Factory stereo upgrades, need help from experienced members please

[XeroExtremities]

I have a 2010 Mazda 3 s Sport Hatch with the BOSE/moonroof package.

First I'd like to say I highly regret getting the BOSE package after running into all these problems with their damn amp and HU wiring.

Here's what I want to do:

1. Keep the Factory radio
2. Install my 4 channel Amp to run the front and rear door speakers (factory speakers for now)
3. Install my Mono Block Amp to run my Alpine Type R sub, (not the factory sub)

I've got 85% of job done, both amps are wired up and ready to be connected, no problems there. My main issue is that I want MY 4 channel AMP to run the 4 speakers in the doors and NOT the BOSE one, but I can't unplug the BOSE amp right now without losing audio everywhere!

Now from what I've seen on the other posts is that I will need the PAC AOEM-MAZ2 to connect to the factory radio and to get a RCA signal to my amp. I understand that I will be buying that shortly.

My main issue is this, after I run the RCA cables from the PAC unit to MY amp, how do I then hook up the speaker outputs from MY amp back to the factory speakers?

I have not found a single post on here where someone has done this with factory speakers.
All the posts I've found so far people have used this PAC unit to provide signal to an amp that is powering a sub, where you do not need to connect anything back to the factory wiring because you're just connecting an external sub.

At this time I do not want to put in new speakers, or take the doors apart to get the wiring, I want to be able to use the wiring behind the radio, or kick panel if available to tie in my new and improved signal from MY amp and completely cut out the signal coming from the BOSE amp.


Has anyone done this the way I'm describing? After I install the PAC unit is there a way I can cut the PAC unit wires and not the factory wires to tie into the speakers or will this kill the RCA output signal going to MY amp?

Thanks for your help, this is my first time wiring and upgrading a new car while keeping the factory radio.

 

[Cloud_Walker]

The wires from the head unit and the wires to the speakers both go to/come from the Bose amp. There's one harness that takes care of it all. So you take out the harness from the bose amp, and use the wires attached to it to hook up to the line-in/speaker-out connections on your 4 channel. Boom, done. Google around for wiring diagrams to find out what wire goes where. If you can't come up with anything, I'll see if I still have the reference from my install.

EDIT: Oh s***, forgot you had a 2010. I have a 2009 and that's how it worked for me. I would guess that the 2010s are very similar, if not the same, though.

 

[XeroExtremities]

The wires from the head unit and the wires to the speakers both go to/come from the Bose amp. There's one harness that takes care of it all. So you take out the harness from the bose amp, and use the wires attached to it to hook up to the line-in/speaker-out connections on your 4 channel. Boom, done. Google around for wiring diagrams to find out what wire goes where. If you can't come up with anything, I'll see if I still have the reference from my install.

EDIT: Oh s***, forgot you had a 2010. I have a 2009 and that's how it worked for me. I would guess that the 2010s are very similar, if not the same, though.

Thanks for the reply. I played around with the amp and found a black harness (out of 3 harnesses on the amp) connected to it that when unplugged cuts audio to all the speakers, so I'm sure that's the harness that is carrying everything I need, problem is there's no pinout diagram for any 2010 BOSE equipment for this car

I tried to manually test each pair of wires with an external radio hoping to hear sound out of a speaker when it made contact with any of the wires, but after 15 minutes and all the possible combinations of wire pairs I could try I didn't get a single speaker toned out on that harness.

I did try the green harness next to it and was able to find 4 speakers using this method, however I'm still in need of finding the wires for the front two speakers. And based on my findings they have to be in that original black harness.
If you could provide me with whatever info you had from your 2009 one I'd really appreciate, hopefully the wiring will be the same