PM if you would like a copy of the 2009 Acura TL Stereo NON NAV Schematics. The zip file is roughly 2.5 meg with the images around 1500x1200 resolution.

These documents show connections to head unit (usb, XM, Aux, hands free link) as well as from head unit to the amp and then out to each speaker.

Here is an example of a scaled down image.

 

you don't happen to have a set for sh-awd with tech do you? thanks.

 

No. I got these at the dealer when i went in for the oil change. I stopped at the service desk and asked for them. Printed them off free of charge.

 

ah well, thanks anyway i'll have to see if i can do the same at my dealer.