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20 pin Honda Head unit CN701 proprietary connector layout
20 pin Honda Head unit CN701 proprietary connector

Head unit pinout abbreviations

Pin
Notation
Pin function

Power pins

B+ 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

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

SW+B Switch to battery

 

14 pin Honda Head unit CN702 proprietary connector layout
14 pin Honda Head unit CN702 proprietary connector
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Honda CQ-YH5070L, CQ-YH5071L, CQ-YH5072L, CQ-YH5074L, CM-839RA visual pinout:click to enlarge
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