[datbimmer]

Hi,
I am currently working on a combox retrofit on my 2007 335i.
I did the CCC to CIC retrofit about 6 months ago and all works well.
I never had any module in the trunk. I only found the big white plug and a couple of small plugs. This leads me to believe what I'm looking for is a

TCU to COMBOX pinout.
I was able to find this one:
1----Mic(pos)--------------25----Mic(pos)
4----AUX-GND-------------10----AUX-GND
15---Crash Sig.-------------7----Crash Sig.
17---30 Power+ 5A---------2----30 Power+ 5A
18---30 Power+ 10A--------1----30 Power+ 10A
19---MIC(neg)------------12-----MIC(neg)
21---MIC Shield-----------11-----MIC Shield
23---Shield---------------22-----Shield
31---SOS sig.f Button-----18-----SOS sig.f Button
33---Wakeup-------------15-----Wakeup
36---31 GROUND(neg)-----14----31 GROUND(neg)
37---emerg. Speak.(pos)--21----emerg. Speak.(pos)
38---emerg. Speak.(neg)--20----emerg. Speak.(neg)
50---emerg. butt LED-----17----emerg. butt LED
54---GROUND-

I however don't have the wires in the stock plug anymore and I would really need to know which color goes where in the new plug. I swapped them over by color matching the wires from the old plug to the new one. I had 2 remaining wires from the car which were blue and green.

I am now trying to fix the MOST loop however I can't get the combox to answer back to complete the loop. I know for sure red light flashes at combox however it doesn't send anything back. This makes me believe something might be wrong in the pinout.

Combox is a BN2000 out of a 2012 335IS.
CIC is 2011.

[PichaDis11]

Let me know if this helps you..