[/FONT]I need some help instaling a new head unit in my 98 gt without the mach system. I bout the cd player from cruthfield and got the wiring harnesses. I got two different plugs and only one came off the original tape deck along with two grey wires and a black one so i am not sure which one to use. What are he speaker wire and which ones are the power and gound wires? I have installed headunits befor but they did not have the cd player and tape player in separate units.