Aftermarket stereo question
Hi my name is john Phillips an I need some help I recently purchased a 2002 ford mustang gt coupe with the Mach 460 stereo. It already had the aftermarket head unit installed when I bought it. Here's my problem: the stereo only plays through the driver side tweeter and the right rear tweeter and nothing else is working including the amplifiers. And I don't know how to go about fixing the problem. Can anyone help me?