Mazda 3 Bose Amp Wiring Diagram. The amplifier to front and rear speakers is located in the trunk on the drivers side. You can see the amp, through the access panel, but you need to pull out the walls to get to it.
Do not remove the harness protective tape.
Especially this one on the picture to find speaker inputs and outputs.
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Getting ready to install an after market amp & sub this will be helpful. To remove the wiring harness from the clip in the engine room, pry up the hook of the clip using a flathead screwdriver. The BOSE amp takes the difference of these signals to get the original signal with twice the voltage and any noise common to both lines subtracted out entirely.
