Old Car Squeaks, Rattles and Groans
Same deal here. I installed 3 amps for the front, rear deck and sub woffer to drown out the world.
OK, seriously. It will have to all come down and reinstalled once you poke and prod around. It is really the only way to do it. Once you find the noise maker, it's ethier replaceing the clip/washer/nut/whatever it is and buttoning it back up.
I'm going through this on My Magnum now. And what happens now? Things break, clips bend and I take a trip to the dealer. It is a bummer owning a older car when your trying to hammer out the oldness of it.
Once it's done, it'll probably just simply strat over again after awhile.