So I posted a few months ago about just driving along listening to the radio, taking a turn, and my rear right speaker busting out in a really loud constant hum. I quickly turned off the radio and it stopped. Whenever I'd turn on the radio it would start immediately. Someone suggested it may have been my amp that blew, so I just disconnected the speaker from inside the trunk.

So a few days ago I'm driving again listening now to only 3 speakers, and my left rear speaker breaks out into a loud hum just like the right one before! Is this the other amp blowing? Or is it wiring maybe? Any ideas? Btw, I have stock bose speakers and a pioneer deck.