Anyone know what this wire does?
 

I was adding a second bumper antenna so my cradel would have more range.

I found a 3 prong wire running with the antenna wire. Anyone know what it's for? Do I have the right antenna wire? It is the only one I found down there but I must say I did not see a real increase in signal strength.

http://image.boompa.com/images/users...82-176_525.jpg

Thanks

Cell phone booster power.

Power ground telephone on are the three wires.
There is info on this page
http://www.bimmernav.com/BMW_X5_Blue...tructions.html

and
http://www.bimmernav.com/pdf/compensator.pdf

I think it is the ejection seat.

I have searched this site and they do not list a cell phone power booster?
Any idea what it looks like and do I need one?

Thanks