my solution ...
So you have a power adapter too for charging?
coalman- how did you make the usb charger? Is that tapped into the cig lighter?
Ok.. I did this, but when my media source is plugged in (Phone, Bluetooth adapter, etc) to the car's power via the Lighter ports (Either one, front or armrest), I lose audio to the right side of the car..
Any ideas? Ground Isolation loop need to be wired in? This does NOT happen when I have just the 3.5mm cable plugged in and the source is not hooked to the power system..