I tried looking for information before I posted but I need to ask about the serial port on the mounting sleeve. When the Empeg is installed in the car and is running V2.00 and Hijack does the serial port output anything under normal operation?
What I am really after is some way of detecting what source the Empeg is using (MP3, Aux, Tuner - which I don't have)
What I was hoping was that there is some way to detect the difference between the Empeg playing MP3s and the AUX input. I wish to interface a modified factory radio to the AUX input but use my factory GM steering wheel controls to run the radio and the Empeg.
If I had a way to detect the output mode of the Empeg I could automatically switch the factory steering wheel controls between Empeg operation and factory radio operation.

Hope this makes sense... If there is not anything coming out the serial port is there any signal I can grab internally or possibly on the tuner connector?

Thanks for any help

Nick