Wiring Color Guide
This color guide has been accurate when replacing the factory speaker and amplifier in my 2004 330Ci and 2001 325Ci. To double check, you can simply test continuity with a multimeter.
Grey ½ of connector
Pin # 13 / Tweeter Rear Right door + * Yellow Pin # 21 / Tweeter Rear Right door - *Blue / yellow
Pin # 12 / Tweeter Front Right - Blue / Brown Pin #20 / no connection
Pin # 11 / Tweeter Front Right + Blue / black Pin #19 / no connection
Pin # 10 / Switched +12v remote turn on White Pin #18 / no connection
Pin # 9 / Head unit output Front Right + Blue / red Pin #17 / Head unit output Front Right - Brown / orange
Pin # 8 / Head unit output Rear Right + Blue / black Pin #16 / Head unit output Rear Right - Brown / orange
Pin # 7 / no connection Pin #15 / no connection
Pin # 6 / no connection Pin #14 / no connection
Pin # 5 / +12v factory amp +12v supply *Red / green
Pin # 4 / Woofer Front Left +Blue / white
Pin # 3 / Woofer Front Left -Blue / brown
Pin # 2 / Woofer Rear Left +Yellow
Pin # 1 / Woofer Rear Left -Brown
Black ½ of connector
Pin # 34 / Tweeter Front Left - Yellow / brown Pin # 42 / Mid Front Right door + *Green
Pin # 33 / Tweeter Front Left + Yellow / red Pin #41 / Mid Front Right door - *Blue / green
Pin # 32 / Tweeter Rear left door - * Yellow / brown Pin #40 / Mid Front left door + *White
Pin # 31 / Tweeter Rear Left door + * Yellow / black Pin #39 / Mid Front left door - *Blue / white
Pin # 30 / Head output Front left - Brown / orange Pin #38 / Head output Front Left + Yellow / red
Pin # 29 / Head output Rear Left - Brown / orange Pin #37 / Head output Rear Left + Yellow / black
Pin # 28 / no connection Pin #36 / no connection
Pin # 27 / no connection Pin #35 / no connection
Pin # 26 / DC ground factory ampBrown
Pin # 25 / Woofer Rear Right +Blue
Pin # 24 / Woofer Rear Right -Brown
Pin # 23 / Woofer Front Right +Blue / Red
Pin # 22 / Woofer Front Right -Blue / Brown
