Is the navigation connected to the radio?

I have a 04 tl with navigation. I just got done installing a supercharger on. The guy I bought the car from, a few months back, had installed a pioneer double din radio. So instead of installing the gauges on the piller or dash we decided to remove the factory radio and make a custom plate for the gauges.


Problem is now the navigation touch screen and bottom row of buttons does not work. The screen turns on, asking for the navigation code, but I am unable to input the code.

Is the factory radio connected to just the touch screen? Or did someone mess up along the line?

Thanks!

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