I had a aftermarket headunit with the bose speakers that a audio shop put in. I'm now replacing the headunit and i had to replace the interface that you need. I have a new interface and hooked the radio up and NO sound is coming out. NONE. So whats up? I got the FAI-3A interface from walmart, is this the right interface? I know the wires are connected because I checked.

 

Nevermind. FYI connect the dark blue wire.