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24 pin Mazda Head Unit proprietary connector layout
24 pin Mazda Head Unit proprietary connector
at the car stereo

Head unit pinout abbreviations meaning

Pin function

Power pins

B/U Battery+  (12V direct from Battery). 
GND, GROUND Chassis Ground
ACC Ignition powered. +12 V with the ignition key is in the ACC or ON position.


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Mazda Clarion CC45 66ARX PT-2674J visual pinout:click to enlarge
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