Originally Posted by axeman71

If I understand your question correctly you are talking about the aux in on your radio, not the aux out.

Go to Amazon.com and search for the "Belkin F8Z492 Bluetooth Music Receiver for iPod and iPhone". It receives a bluetooth signal from your iphone and converts it to analog for your radio. There appear to be other manufacturers of similar devices, this is just the first one I ran across on Google.