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26 (10+8+8) pin ISO 10487 Head Unit / Car Audio connector layout
26 (10+8+8) pin ISO 10487 Head Unit / Car Audio connector

Head unit pinout abbreviations meaning

Pin
Notation
Pin function

Power pins

KL 30 Battery+  (12V direct from Battery). 
GND, GROUND Chassis Ground
KL15 Ignition powered. +12 V with the ignition key is in the ACC or ON position.
lightbulb image Backlight adjustment
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- 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.
SCV This pin is used in some radio equipment to automatically boost up the volume. It needs the output from the speed sensor.

 

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