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20 pin Honda Head unit CN701 proprietary connector layout
20 pin Honda Head unit CN701 proprietary connector
p/n 39101-S2A-A110-M1, 39100-S2A-A100, ref MF711AB

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. +12V supplied to 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- 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.

Honda Insight (2000-2006)

 

Pin
Number
wire color function additional info
1 WHT/GRN Antenna  
2 YEL/RED ACC Main stereo power supply
5 PNK Right rear speaker (+) Optional: '00-03 models
6 BLU/WHT Left rear speaker (+) Optional: '00-03 models
7 GRN/YEL Passenger's door speaker (+)  
8 GRN/BLK Driver's door speaker (+)  
9 RED/BLK Lights-on signal  
10 WHT Constant power  
15 BLU/YEL Right rear speaker (-) Optional: '00-03 models
16 BLU/BLK Left rear speaker (-) Optional: '00-03 models
17 GRY/RED Passenger's door speaker (-)  
18 LT GRN Driver's door speaker (-)  
19 RED Dash lights brightness controller  
20 BLK Ground  
14 pin Acura Head Unit CD Changer connector connector layout
14 pin Acura Head Unit CD Changer connector connector
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Honda CR-V (1999 - 2006) and others 2TFO Head Unit visual pinout:click to enlarge
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