I brought a 1991 integra, it has four factory speakers and a factory tape deck. The problem is that all four speakers wont work unless I wiggle the wiring harness. After taking the radio and lookng at the wiring harness and connection up close, I didnt see anything wrong with it. is that fucker grounded or something that I didnt notice, or is the factory radio just had it? It looks new,all the buttons work with no wear on them, the whole car looks new for that matter.