the ground wire on that harness should be near the top left i believe...you need to make sure it is not taped up without being grounded...get a screw driver, preferably a flat head, and scratch the hell out of a piece of metal...use a ground connector and screw that down on the metal you scratched...if that dont work head to a stereo shop and get a ground loop isolator installed...dont pay more than 20.00 installed...i used to be a salesman at an audio shop...then check your speakers and make sure that each speaker has both wires snugged tightly in the speaker connector...if none of those work than i would have to assume the radio you purchased is either re-furbished or you got a lemon...i will check your thread in da morning a c your progress...good luck