need advice

I'm relatively new to this and i wanted to see what some experienced people thought. It's my first time actually buying an aftermarket system for my 1997 Mitsubishi Mirage De Coupe and the setup I want includes Head unit - Kenwood Excelon KDC-X396 (22 watts RMS x 4 channel, 50...

Hi, I'll make this simple with no details, but I have had a system (it IS my first so I'm still learning things) in my car for a month or two that my friend and I installed. I'm getting very frustrated with one particular ground wire that I have attached under a bolt on my driver's side front...