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In my attempt to add a subwoofer to my bose-equipped mazda 6, I have not been able to find a source for the audio. I found some wiring schematics for the 2014 model, but I can't seem to find the location of the wires.

I am looking for the signal going from head unit to the bose amplifier, so I can tap into the original signal. I looked into removing part of the dash, but didn't make it far before loosing daylight. I can always tap into the signal going to the stock subs in the doors, but I'd prefer to get the original signal.

Any pointers to the location of the headunit or location of a wire that I can tap into would be appreciated :grin2:
 

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Discussion Starter #3
Thanks I'll take a look. If it is hopefully I can match the colors on the wiring harness to the diagram.
 

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From looking around I believe the amp may be in the passenger side kick panel. Let me know as I have a '16 GT with Bose and miss my 10" sub in my previous car.


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I got everything installed. Thanks to Juan Carlo for pointing me to check under the seat, I should have checked there first, but I guess I was tired from building the box. Here is some info and pictures in case anyone is interested in doing the same.

On my 2016 Touring with Bose and probably the same with a GT, the Bose amp is located under the passenger seat. To get to it you will need to remove 2 10mm bolts, one in the front and one in the back. The amp has 3 connectors. The wiring schematics in my original post matched the wire colors on the car. To tap into the original signal before Bose processing you'll need the connector furthest to the front of the car.

I used the gray and the blue wire. NOTE that the Bose headunit already sends low level signal to the amp, so you do not need a line level converter. All you need is to take your RCA cable, cutting away and splicing one of the terminals and use it to tap into the wires.
 

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Thanks mazpro2. On your 3rd picture there’s 3 connectors. The green one in the middle, and two black ones. One black connector has 8 thicker wires and the other black connector has smaller wires.
You said you tapped into a blue and a grey wire. Which connector are they located at?
Also how did you get the amplifier to turn on/off with the stereo?
Your install looks clean!!!!
 

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Those sub-waffers look cool, I have the touring edition just because Mazda doesn't offers the grand touring in manual I'll be upgrading the speakers.
 

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Discussion Starter #9
Great work!

Anyway you can post a higher quality version of the wiring diagram?
Sure man, I grabbed it from the interactive worshop manual Byakuya posted in this thread.
Link to Manual Page

Thanks mazpro2. On your 3rd picture there’s 3 connectors. The green one in the middle, and two black ones. One black connector has 8 thicker wires and the other black connector has smaller wires.
You said you tapped into a blue and a grey wire. Which connector are they located at?
Also how did you get the amplifier to turn on/off with the stereo?
Your install looks clean!!!!
Thanks! The connector I used was the black one on top. I am attaching another picture pointing it out.

I ran the remote wire before finding the Bose amp, so I just found an ACC wire to turn on the amp under the driver's side dash. I am sure you can grab it from the Bose amp wiring also, so you don't have to go looking for one with I tester like I did.


Those sub-waffers look cool, I have the touring edition just because Mazda doesn't offers the grand touring in manual I'll be upgrading the speakers.
Thanks man, do it! it'll be a great upgrade. I am also planning on upgrading the front speakers some time soon.
 

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I got everything installed. Thanks to Juan Carlo for pointing me to check under the seat, I should have checked there first, but I guess I was tired from building the box. Here is some info and pictures in case anyone is interested in doing the same.

On my 2016 Touring with Bose and probably the same with a GT, the Bose amp is located under the passenger seat. To get to it you will need to remove 2 10mm bolts, one in the front and one in the back. The amp has 3 connectors. The wiring schematics in my original post matched the wire colors on the car. To tap into the original signal before Bose processing you'll need the connector furthest to the front of the car.

I used the gray and the blue wire. NOTE that the Bose headunit already sends low level signal to the amp, so you do not need a line level converter. All you need is to take your RCA cable, cutting away and splicing one of the terminals and use it to tap into the wires.
Sorry to thread dig but this is the most relevant post I've found on the entire internet that contains the info I need.

Anyway, if you happen to see this. I'm trying to do the same in my 2016 6, but I'm adding an entire system and not just a sub. Like you, I also want to take the original signal so I can avoid the annoying Bose processing. I see that you took just the grey and blue wires. Do you know the details of all the signals along that cable? What I'm trying to figure out is if at that point in the chain the source is just a straight up 2-channel stereo signal that's passed using those two wires, referenced to a common ground and you tapped into that, or if before the Bose amp 4 channels are already being generated and you simply tapped into the positive and negative of 1-channel since you were just adding a sub only. So essentially, I just wanted to see if you remember exactly what is being transmitted on those two wires, and if you knew what the neighboring wires are as well.

I'm fine going out to my own car with my scope and experimenting but I was hoping you happened to know so that I have a way to verify that my findings are correct.

Thanks.
 
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