Front LH/RH speakers not working for audio but works in bluetooth
 

Hey everyone, I have the factory Bose system with Navigation and for some reason the front LH/RH speakers don't seem to work for audio whether in ipod or AM/FM.

I assumed I blew both speakers but they work perfectly fine when in hands-free mode. This diagram assures that the bluetooth output is definitely the speakers and not the tweeters.

Upon some research, I'm guessing the fault lies somewhere between the AV Unit and the Bose amp according to this diagram.

If my speculation is on the right track, how should I go about troubleshooting this problem?

Checked your L-R balance settings?