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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

Head unit pinout abbreviations

Pin
Notation
Pin function

Power pins

KL.30 Battery+  (12V direct from Battery). 
GND, GROUND Chassis Ground
KL.15 Ignition powered. +12 V with the ignition key is in the ACC or ON position.
lightbulb image Backlight adjustment
__/ +--- Switched power out

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

strikeout speaker This pin is used to silence the audio, earthed by some other external components that is connected to the radio.
SCV Speed control volume
According to 2 reports in our database (0 positive and 2 negative) the Skoda Symphony Car Stereo pinout may be incorrect.

Is this pinout
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