CD Player Color Codes
Due to many different wiring harnesses with different color codes we recommend you use a 9v battery for testing.
Simply take the same color wires (one will have a black line and one will be solid), and touch them to the positive and negative to the 9v battery. By doing this, the speaker will make a slight popping sound.
Follow the color code instructions from the CD players manual to determine speaker wires.
If you are still experiencing troubles please feel free to fill out a support ticket so a technician can further assist you.