Radio Replacement

I am replacing the factory radio with a DD Sony. Does a stock 2007 radio have a separate amp or are the wires at the radio connected directly to the speakers? Anyone have a radio wiring diagram?

Thanks
Tom

 

would depend if you had the JBL system or not

 

Thanks. How do I tell? There are no markings on the speakers or radio that say JBL. Does that mean no separate amp? Thanks
Tom

 

jbl says jbl on the stereo and there would be a small sub behind the seat,i don't have jbl and it was a easy swap for a sony double din , thanks to crutchfield!

 

Great thanks! What face plate kit did you use? I'm putting in a Sony dd. I got a metra kit and the fit around the radio is terrible. Huge gap around the head unit.

Thanks
Tom