Automotive Head units pinouts  > Seat pinouts
Blaupunkt

Head unit pinout abbreviations meaning

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.
iLLUM 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
 IN-R, IN-L, GND-LIN Audio line IN

Misc. pins

MUTE This pin is used to silence the audio, earthed by some other external components that is connected to the radio.

 

36 (20+8+8) pin Head Unit / Car Stereo ISO connector layout
36 (20+8+8) pin Head Unit / Car Stereo ISO connector
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