2006 a6 mmi/Bose problems
 

Hey everyone im new to the forums as I just bought a 2006 a6. The radio wasn't working when I bought it, so I put a new(to me..eBay!) bose amplifier in it. The amp fixed it... halfway. There's no sound coming from the passenger side of the car. So, I pulled the front door panel off and found there was enough power to the speakers, and ran continuity tests and determined the speakers themselves were good also. I found there was sitting water in the trunk where the amp is. I also found that my sunroof drains were clogged and I took care of that. Any ideas to what would cause the passenger side to have no sound? Balance is adjusted properly too. Thanks!