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Discussion Starter #1
2011 Speed3 with Bose...

The HU ouput harness (to the Bose amp) has 4 wires that I cannot identify...

This is a 16 pin, black connector that plugs into the Bose amp, I have identified the following:

Blue w/ stripe = Amp Control
Dk Green = FL-
Dk Blue = FL+
White = FR-
Red = FR+
Brown = RL-
Pink = RL+
Lt Blue = RR-
Green = RR+

Need Identified:

Orange
Yellow
Lt Green
Purple
 

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Orange is speed sense. Most likely it controls the audiopilot feature. One of the remaining is probably a ground, assuming its not grounded VIA body. The other 2, shouldn't matter if you're looking to upgrade audio
 
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