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Old 10-27-2006, 11:49 AM
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stream stream is offline
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Location: San Francisco Bay area
 
Join Date: Jan 2005
Posts: 2,940
Mein Auto: '05 545i
I was thinking about how the antenna connection is made (and if it is made!). I assumed it was through the mini USB port, but I found it is a 4 pin connector, 2 for power and 2 for data:
http://pinouts.ru/data/motorola_miniusb_pinout.shtml

Doesn't seem the mini USB has the ability to transmit RF, so I examined the snap-in adapter.

At the bottom of the snap-in adapter is a wire loop, that when the phone is clipped in, touches the bottom of the phone (which is where the antenna is in a V3):


I looked at the bottom of the part that hinges up, and it appears that wire loop is connected to a coax wire.

On the bottom of the snap-in adapter is the connector which mates with the base plate, and it includes a female coax connector, which connects to its male counterpart on the base plate:


Could it be that the wire loop touching the bottom of the phone near the antenna is enough to make a connection?
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2005 545i - sold
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