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12 pin Mazda old Miata Head Unit connector layout
12 pin Mazda old Miata Head Unit connector
at the car stereo
MAZDA Logic Control 3262

Head unit pinout abbreviations

Pin
Notation		 Pin function

Power pins
B+ 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.
 iLLUM Light-on signal or backlight adjustment. +12V supplied to light-on pin of head unit when tail lights ar turned on.
ANT Power for Electric Antenna. Output +12 V (maximum 150 - 300mA) 

Audio pins
FR+ or RF+ Front right speaker out
FL+ or LF+ Front left speaker out
RR+ Rear right speaker out
LR+ or  RL+ Rear left speaker out
FR- or RF-, FL- or LF-, RR-, LR- or RL-, SGND The corresponding speaker ground

Misc. pins
MUTE This pin is used to silence the audio, earthed by some other external components that is connected to the radio.
CAN-L, CAN-H CAN on board diagnostic bus

 

8 pin Mazda old Miata Head Unit connector layout
8 pin Mazda old Miata Head Unit connector
at the head unit
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