What happens? error message? I had both the Aux port and the USB plug hooked to 2 different phones once and when I turned on my IHeart Radio app and hit the Aux button on my radio, I got an error message. I unpluged the USB and it started working fine.
On the same lines along with this thread. What I want to do is similar to the other guy. I want to leave the factory plug in place and tap into both USB and Aux port wires behind the dash and route them to the back side of the center console / arm rest where I want to add another factory USB / Aux plug. Along with that I also want to do the 400 watt anytime mod and while I do that I want to add the plug ins on the back side of the console too.