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Discussion Starter · #1 ·
I am working on installing an Alpine stereo (CDA 9856) into my BMW 525i, and I didn't know if there would be a problem with the wiring, I have the OEM wiring harness already, I ordered it from crutchfield, but the problem I see is that the BMW speaker system is component and my Alpine stereo wiring harness has 4 pair of wires (LF, RF, LR, RR). Is this going to cause a problem?

I have the charts saying what wire colors go to which speakers in my BMW, but I don't know what i'm supposed to do.

Please help. :-/
 

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if you match up the harness from your alpine to the adapter you purchase you should be fine. it will be pair of white, grey, purple, and green, each with a positive in the pair.
 

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Discussion Starter · #3 ·
so it doesn't matter that there are more than 4 pair of wires on the factory side?
 

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there are not.

not until it gets to the amp/crossover anyway.
 
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