Danno350z

Hi there, New to the forum so I hope i've put this in the correct area. Just purchased an 03 350z GT and, yep, the Bose sound system doesn't work. It did when I purchased it but heres the situation: When I have the radio on, both speakers in the door work. The rear ones and the sub do not. When I play a CD only the left speaker works and the right one crackles. Very strange. I do plan on changing out the system all together along with a better head unit but for now it would be nice to have an equal distribution of sound in both ears. Ive played around with the fade and balance and this is where I noticed the crackling. Has anyone else had this issue and if so, did you manage to sort it out without binning the Bose? Thanks guys