Here is the stereo radio wiring information for your 2008 Mazda CX-9 CX9 body with the normal or Bose amplified systems. It will be useful when installing an aftermarket radio, sound stereo system, or other automotive accessories. Make sure to grab the appropriate tools to test all the wires in your CX-9. Please check it over and use it as a GUIDE to help you locate the appropriate wires. This schematic is provided free of charge and may not be 100% accurate. Failure to properly test all the wires may lead to vehicle or bodily damage. All information is provided as-is and accuracy is not guaranteed.
If you find any conflicting info please leave a comment with what you found in your Mazda CX9. If you don’t see the audio radio wiring diagram you need comment and we will try to add it ASAP. Thanks for looking!
2008 Mazda CX9 Audio Wiring Radio Diagram Schematic Colors – Aftermarket Stereo Install
Car Radio Constant 12v+ Wire: Red/Blue @ Radio Harness
Car Stereo Ground Wire: Black @ Main Radio Harness
Car Radio Ignition Switched Wire: Pink/Blue @ Main Radio Harness
Reverse / Backup Wire: Red/Yellow (+) Driver Kick BCM or harness to rear
Car Radio Illumination Wire: Red/Black @ Main Radio Harness
Car Radio Amp Turn On Wire: Purple/White @ 24-pin radio connector pin 6
Car Stereo Power Antenna: N/A @ Main Radio Harness
Non-Bose Speaker Wires At Radio:
Left Front Speaker (+) Positive: Dark Blue/Orange
Left Front Speaker (-) Negative: Lavender
Right Front Speaker (+) Positive: Gray/Blue
Right Front Speaker (-) Negative: Yellow/Green
Left Rear Speaker (+) Positive: Green
Left Rear Speaker (-) Negative: Green/Black
Right Rear Speaker (+) Positive: Yellow/Black
Right Rear Speaker (-) Negative: Yellow
SPEAKER WIRE COLORS AT THE AMP – RIGHT REAR QUARTER PANEL
Left Front Door Speaker Wire (+) Positive: Blue/Orange
Left Front Door Speaker Wire (-) Negative: Purple
Left Front Tweeter Speaker Wire (+) Positive: Red/White
Left Front Tweeter Speaker Wire (-) Negative: Red/Yellow
Right Front Door Speaker Wire (+) Positive: Gray/Blue
Right Front Door Speaker Wire (-) Negative: Yellow/Green
Right Front Tweeter Speaker Wire (+) Positive: Blue/White
Right Front Tweeter Speaker Wire (-) Negative: Blue/Red
Left Rear Door Speaker Wire (+) Positive: Green
Left Rear Door Speaker Wire (-) Negative: Green/Black
Right Rear Door Speaker Wire (+) Positive: Yellow/Black
Right Rear Door Speaker Wire (-) Negative: Yellow
Center Channel Speaker Wire Positive / Negative: N/A
Subwoofer Speaker Wire Positive / Negative: N/A
Retain OEM AUX In Center Console – 16-pin Connector at Back of Radio
Take a normal rca cable and cut one end off leaving yourself RCAs and a foot or two of slack. Strip the left and right ends twist the common shields together and then connect them to the following wires:
OEM AUX Left (+) Positive: White/Blue
OEM AUX Right (+) Positive: Red/Blue
OEM AUX Common Shield: Green/White (either green/white in this plug will work they are common)
Radio Size: Single or Double Din
Radio Removal Tools: – Dash Removal Plastic Pry Tools – Use these tools to help carefully unclip and remove both side panels from center radio trim panel. Carefully remove the shifter trim panel. Remove 1 screw from the trim panel with the power port then remove the panel. Remove 1 screw on the side of each vent holding the main radio trim panel on. Remove the main trim panel then remove 4 screws and pull the radio.
If you are installing a new aftermarket radio in your CX9 you need the wiring harness, the antenna adapter, steering wheel control module, and the mounting kit as well.
REQUIRED PARTS FOR AFTERMARKET RADIO INSTALL
MOUNTING KIT FOR SINGLE or DOUBLE DIN AFTERMARKET RADIOS:
This harness can be used with the non-bose or bose systems. It will also retain your steering wheel controls no need for a separate adapter! Further yet no need to relocate the OEM radio for setting the clock functions or scrolling through the MPG – all can be done from the steering wheel!
N/A – Not needed
STEERING WHEEL CONTROLS ADAPTER:
Not needed if using the wiring harness above, otherwise this one below is great!
SPEAKER WIRING ADAPTERS:
Adding A Backup Camera:
We’ve had great luck with this camera for a nice rear view. Mounted on the OEM lip above the license plate you see just a hair of the bumper in the image so you can really dial in your parking.
RECOMMENDED TOOLS FOR THE INSTALL – SAME ONES THE PROS USE!