Ok so i just got a 02 mustang and well it has the factory system in it and well the stereo is on but the sound is really low and the volume is all the way up and you can barely hear anything. Anybody have any clue what the deal is?

 

Possible blown speakers, or the factory amplifier is going out, make sure the previous owner did not do anything aftermarket in there they could have wired it back up wrong if they did re-installing the factory equipment in there if they had cut the wire harnesses (i have seen this hundreds of times).