I just got an 05 coupe 6mt, without the bose system. I have no audio from the front left door. No tweeter and no woofer. I used to be an installer and sometimes this would mean a broken wire in the rubber boot in the door, but it could also be the head unit. I don't suspect the speakers themselves since neither of them are working.

So I wanted to check if anything is common on these before I go tearing stuff apart troubleshooting or buying equipment. Thoughts?