Before you start to flame, I searched all over, I saw it posted once, but I can't find it now. I am looking for the pinout for the secondary harness to my factory Bose HU. The primary harness is the regular HU harness, the secondary one has the steering wheel controls. I am NOT going to use an interface, I have a HU that has it built in, I just need to find out which wires are what in my factory harness so I can correctly hook them up to my aftermarket HU. So thanks in advance if you have this info. Please don't point me out to any info that doesn't have the secondary harness info, and once again I am NOT going to use an interface, as my new HU has it built in. (there was a post that mentioned 4 wires in that harness for the controls and what they were, but I just cannot find it now)

 

i need to also. any word?

 

OE Head Unit: Pin A3 - GRN/RED wire.

 

That is not correct. I believe that is the amp turn on wire...

 

A1 is radio/amp's switched power wire (ORG).

 

Correct, the power for when the ignition is turned on, also not steering wheel control or amp turn on. Thanks for the effort!