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14 pin Head Unit proprietary connector layout
14 pin Head Unit proprietary connector
Clarion. Also for the 2010 Subaru Outback with Macintosh audio with navi

On the 14-pin connector for the power and illumination connections (and speakers in other Subaru models), pin #6 is +12V Battery/constant-on. The term "Back Up" is meant like memory back up, not reverse gear lights.

Also, in most Subaru models, pin 14 is used to provide +12V power to an antenna booster amplifier.  Very few models have a motorized antenna.

Radio reception will be degraded noticeably if the voltage to a Subaru's antenna booster amp falls below 12.0 V.

Head unit pinout abbreviations

Pin function

Power pins

B+ Battery+  (12V direct from Battery). 
GND Chassis Ground
ACC Ignition powered. +12 V with the ignition key is in the ACC or ON position.
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-, SGND The corresponding speaker ground


According to 3 reports in our database (3 positive and 0 negative) the Subaru Legacy (2003-2006) Mclntosh PF-40621 pinout should be correct.

Is this pinout
Subaru Legacy (2003-2006) Mclntosh PF-40621 visual pinout:click to enlarge
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