I have a 98 chevy camaro with monsoon radio and amp. I know the radio works the speakers in the main back and the amp work the 4 in the front and back seat. However, the two in the front doors do not work, and the one behind the drive side in the backseat does not work. The one behind the passenger in the backseat works.. Looked up the wiring diagram for radio and tested the out put wires and they worked fine. Also the passenger front speaker will buzz, then go away, buzz and go away. Kinda weird. Any ideas?

 

bad amp maybe? combination of bad amp and speakers. how did you test the wires, are you sure your head unit is puting a signal out to the amp for those channels.