I purchased the following BMW components:
Microphone 84 31 8 380
338
Antenna Base 84 50 6 907 304
Connector Box 84 50 6 907 306
Dual
Band Antenna 84 50 6 907 302
Most every BMW I have seen made in the last 5 years has come pre-wired for
a
phone. The antenna cables are there, the handset cables are there,
the
microphone cables are there, and the transceiver cables are there.
The
trick was to identify and use these cables to interface to my Nokia kit.
I chose to mount the cradle in the factory location in the center
console.
(pic 13) I used a male header I bought from Radio Shack (PN
910-1530) to
make a cable to interface with the wiring under the armrest (you
can just
splice wires if you want to here). I mounted and connected the
Nokia
control unit here under the console. I used two short pieces of
duplex
(Speaker) wire and one each of a mini (Radio Shack PN 274-0286) and
super
mini (PN 274-0289) mono jacks to connect the Mic and Speaker ports on
the
Nokia unit to the car wiring. The completed harness is shown in pic 9.
The BMW phone mounts in the trunk so most of the wiring terminates there
on
a female DB-25 connector. (pic 3) I made an adapter (pic 16) to route
the
Mic, Speaker, 12V Battery and Radio Mute up to the center console
connector.
(pic 7) The car has two RG-58 coax cables in the trunk with the
DB-25. One
goes to the center console and the other goes up the left side (US
Drivers's
side) C-pillar. Connect theses two cables together in the trunk to
complete
the cable run from the console to the C-pillar. The cable in the
C-pillar
is doubled back on itself and needs to be unfurled and routed over
to the
center of the rear glass to connect to the factory antenna connector
box.
I have included the complete pinout of both my adapters and the car
wiring
below. Hope this helps any who wanted another option than
BMW/Motorola.
Center Console
AMP 18-pin Female
---------------------
1 Blue
Pin 11 of DB-25 in trunk
2 White/Red Pin 12 of DB-25 in trunk
3
White/Green Pin 18 of DB-25 in trunk
4 Yellow/Red Pin 1 of DB-25 in
trunk
5 Not Used
6 Blue/Green Pin 6 of DB-25 in trunk
7 Yellow Pin 23
of DB-25 in trunk
8 Violet Ignition 12V
9 Yellow/Black Battery 12V
10
Brown/White Ignition 12V
11 White Unknown
12 Not Used
13 Orange Pin 8
of DB-25 in trunk
14 White/Grey Pin 21 of DB-25 in trunk
15 Grey
Illumination
16 White/Blue Pin 7 of DB-25 in trunk
17 Brown Ground
18
White/Black Pin 24 of DB-25 in trunk
Left Side Trunk
Female DB-25
---------------------
1 Yellow/Red
Pin 4 of AMP in center console
2 Not Used
3 Brown Ground
4 Red Battery
12V
5 Violet Ignition 12V
6 Blue/Green Pin 6 of AMP in center console
7
White/Blue Pin 16 of AMP in center console
8 Orange Pin 8 of AMP in center
console
9 Not Used
10 Black Radio Mute (Ground to Mute)
11 Blue Pin 1
of AMP in center console
12 White/Red Pin 2 of AMP in center console
13
Not Used
14 White Microphone (+)
15 Brown/White Microphone (-)
16 Red
Battery 12V
17 Brown Ground
18 White/Green Pin 3 of AMP in center
console
19 Yellow/Black Speaker (-)
20 Brown/Black Shield for
Microphone
21 White/Grey Pin 14 of AMP in center console
22 Not Used
23
Yellow Pin 7 of AMP in center console
24 White/Black Pin 18 of AMP in center
console
25 Green Speaker (+)
Male connector for
AMP 18-pin connector
located in center
console
--------------------------
1 Speaker (-)
2 Speaker (+)
3
Yellow from Nokia Harness (Radio Mute)
4 Not Used
5 Not Used
6 Mic
(-)
7 Not Used
8 Blue from Nokia Harness (Ingnition 12V)
9 Not
Used
10 Not Used
11 Not Used
12 Not Used
13 Red from Nokia Harness
(Battery 12V)
14 Not Used
15 Not Used
16 Mic (+)
17 Black from Nokia
Harness (Ground)
DB-25 Adapter for Trunk
--------------------------
1 Not Used
2
Not Used
3 Not Used
4 Loop to Pin 8 (Battery 12V)
5 Not Used
6 Loop
to Pin 15 (Mic -)
7 Loop to Pin 14 (Mic +)
8 Loop to Pin 4 (Battery
12V)
9 Not Used
10 Loop to Pin 18 (Radio Mute)
11 Loop to Pin 19
(Speaker -)
12 Loop to Pin 25 (Speaker +)
13 Not Used
14 Loop to Pin 6
(Mic +)
15 Loop to Pin 7 (Mic -)
16 Not Used
17 Loop to Pin 20 (Ground
for Mic Shield)
18 Loop to Pin 10 (Radio Mute)
19 Loop to Pin 11 (Speaker
-)
20 Loop to Pin 17 (Ground for Mic Shield)
21 Not Used
22 Not
Used
23 Not Used
24 Not Used
25 Loop to Pin 12 (Speaker +)
Try this at your own risk and other disclaimer-type language applies.