I am having a problem with my aux jack in my 2006 4runner. When ipod is plugged in, music only plays from either front L or front R speaker. When in CD or stereo mode, speakers/sound quality is normal. Bought a new aux cord but it did the same thing. Also, it now wants to switch from aux mode to CD mode on its own and today I could not get it to go into aux mode at all until I turned off the power and turned it back on. The stereo is the 6 disc JBL model. Thanks in advance for any suggestions!