I want to add an external amp and sub. Does anyone know what the wire on a 2005 M3 H/K system are. I nee to know which wires are the speaker wires and which one is the remote turn on?

Got this off of Roadfly. I just did a full install on my car so let me know if you have any questions.

Re-Print of David Badgy’s wiring diagram for E46 cars taken from here (not added the H&K signals as I did not used them):
http://e46fanatics.com/faq/stereosaga.html


Factory harness Wiring information:
Now that you have the connectors made, you need to figure out how to wire things up…
Some of the wiring harness info available on bimmer.org in the archives and the info faxed to me by ADS for the E46 is WRONG.

In the course of making the connector I started with info from the bimmer.org archives and a faxed page of info from ADS re E46 wiring – both had (different) errors in them – be advised that it pays to check all wiring for yourself in a project like this. Both sources had incorrect pin numbers and colors that did not match the wires physically in the harness. I have provided (to the best of my knowledge) corrected information below.

The notation I used below is:
Pin # xx / Signal
(main wire color) / (wire stripe color)
no connection literally means that there is not a wire in the factory harness at that pin.
Signal name followed by an * are signals that I believe to be correct, the color code is verified with the harness etc, but I did not personally use these signals in the
upgrade so I can not claim to have proven the connections out personally. In particular I did not verify the +/- polarity of the factory mid range speakers. The non-* signals lines I am using to run the upgraded system so I am sure they are correct (at least for my car).

The harness connector pin numbers are embossed on the plastic. There are two “halves” to the connector, looking at the female harness connector its pin lay out looks like this:

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

Pins 1-5 and 22-26 are heavier connections that then other pins, these are the ones that feed the woofers and provide power to the factory amp. I did not use the power connections for the factory amp for the ADS amp – the ADS can draw 30A and the factory connector had wire much to small for that type of current draw. Instead I powered the ADS amp directly (with safety fuses etc) from the battery (easy since BMW puts the battery in the trunk).

This info should be saved in the DIY section here.