i want to connect my iphone into my aux jack on my base model fit 07. Can someone point me to any threads?

 

You don't have an aux jack unless you added one yourself. I did, here's how:

https://www.fitfreak.net/forums/fit-...er-socket.html

I helped another fit owner hook up an ipod-specific interface to the same port. It has the full ipod plug (not just the headphone jack) and allowed the stereo to control a few of the ipod controls