please i really need help

Hi, I have a Pioneer As a cd player, qith a system, ANd mY car is a Pontiac Grandpix, everything works fine, the radio the system everything, BUT when I turn on the headlight at night the radio does not works fine, You can only hear the bass from the system but not the radio, It might be a cable in the back from the factory because I did not connect like four cables, Please i really need help. thank you

Its a 2000 (year)

man that made no sense at all

Here is what I gathered, correct me if I am wrong. You have an aftermarket Pioneer CD player. It seems to work fine until you turn on the head lights. When you do turn them on all you hear is bass.Answer these few ?'s and maybe some one will have a better time helping you. Is the CD player the only upgrade to the factory sys.? Did you install, any or all of, the stereo your self? When the headlights are on is the bass coming from all the speakers or just the rear? Are there any other symtoms?

Thank, but the problem was solve... THANKS ANYWAY

Because, A friend installed the radio, by mistake he connect the Illumination Wire to one of the speakers because both were the same color, so I just cut it and changed and thats it//