I have a 2005 Jaguar XKR Coupe that I can not find the speaker color codes. The system is the Factory Alpine set-up. The 3.5" Dash is a basic Black and Red wire that is labeled + & -. I am guessing that these are wired into the 5.25 on the doors then there is tweets. There is 6 x 9's on the sides in the back and a 8" sub in the back deck with two sets of wires one to each side of the sub. guessing a 4ohm DVC.
Is there a way to tell what wire is Neg & Pos if I can not find the color code?