BMW R1200RT/R1250RT Forum

Hello All - I have an autocom 2273 lead I am trying to wire into my bike.  The BMW dealer will not touch it, and I'm in the states with the nearest autocom dealer thousands of miles away, so I'm on my own.  Can anyone tell me which wires are the positive/negative for the left/right speakers?  If you have a photo of how you wired it up, that would be even better.  Attaching a photo of my radio.


Thanks in advance for any tips you have.

Try with this

RTman10 wrote: Try with this

Yep, I got this same manual with the unit.  The instructions are generic though, saying [size=9px]You will need to experiment find out which is which, depending on how you have installed your speakers. Check your stereo systems speaker wiring diagram to determine positive and negative for the left and right channels.[/size]
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[size=9px]What I was hoping is that someone could give me a jump start on which actual wires coming out of the BMW radio are the speaker wires.  I am also trying to track down a wiring diagram for the radio.[/size]

I think what I will do is pull the covers off the actual speakers, and then identify the color(s) of the wire that plug into them.

I'm no expert as my dealer wired mine but uf you look at the wiring for the 2275 which just has a switch in it its the same

RTman10 wrote: I'm no expert as my dealer wired mine but uf you look at the wiring for the 2275 which just has a switch in it its the same

I think I've got it.  Left speaker is yellow wires, one with red stripe which I will assume is positive.  Right speaker wires are blue, again one with a red stripe.  Just a matter of matching them up to the colors on the wiring harness.  Some posi-taps ought to do the trick.  See pics.