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36 (20+8+8) pin Head Unit / Car Stereo ISO connector layout
36 (20+8+8) pin Head Unit / Car Stereo ISO connector
p/n 4A0 035 186

Abbreviations of head unit pinout

Pin
Notation		 Pin function

Power pins
BAT+ Battery+  (12V direct from Battery). 
GND, GROUND Chassis Ground
ANT Power for Electric Antenna. Output +12 V (maximum 150 - 300mA) 
GAL This pin is used in some radio equipment to automatically boost up the volume. It needs the output from the speed sensor.

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

 

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