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40 (16+12+12) pin QuadLock Fakra Head Unit / Car Stereo connector layout
Разъем 40 (16+12+12) pin QuadLock Fakra Head Unit / Car Stereo
p/n A 203 827 38 42, A 203 870 05 89, A 203 870 50 89, A 203 870 36 89

Head unit pinout abbreviations

Pin
Notation
Pin function

Power pins

BAT 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.
Lum Light-on signal or backlight adjustment. +12V supplied to light-on pin of head unit when tail lights ar turned on.

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.
GALA This pin is used in some radio equipment to automatically boost up the volume. It needs the output from the speed sensor.
Rem Remote control

 

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