If we are still talking about iPhone and Ford Sync:
It is the same problem with Apple AND Google Maps: No sound...if you do not do two things:
One is to turn OFF your iPhone's Blue Tooth option. You can get the sound thru your iPhone (not thru your cars radio) and all works well...but then you cannot use your "hands free" option that you love about your Ford Sync.
So here is the OTHER option: Set your type of source in your car/sync system.
Hit Aux, then Menu, then Sync-Media, hit OK
Now scroll down until you see "Select Source", hit OK
Now scroll down to "Bluetooth Audio" Hit OK
You are ready to roll, with the sound of your Map programs coming thru your car stereo! The same goes for your Pandora app...nice music thru your Ford Sync/car stereo! AND your 'hands-free' options works great!!
Problem: Once you turn your car OFF, the whole arrangement goes out and it reverts back to the default: "LINE IN". The geniuses at Sync told me that they are aware of the 'problem' but they do not plan to have an option like make this MY DEFAULT! Not anytime soon they told me!! Who's paying those morons...us, the paying customers!
I found one way to get around this: Just before you are ready to turn your motor off, SHUT OFF your radio. Most of the time it remembers the last setup you had your SYNC on...but sometimes it does not remember it!
So here we have two giants like Apple and Ford Motor/Sync and they expect (?) guys like us to resolve their problems! Is that great or what?
Anyway, if you guys out there test it and it works for you, please let me know. I'm redy to pick up my new Ford Edge!!!