QuestionQUESTION: I have a 2002 Chevy Trailblazer LTZ that I bought used in December 08', the problem is that that the front speakers and warning chime are very faint, but I have noticed that when I park it in direct sun light and it warms up depending on whice side it is they work. I have the Bose 6-disc changer.
ANSWER: Hi Will,
Here's how the Bose system works in your Trailblazer: the head unit (your factory radio) sends a 2-channel audio signal to the Bose amplifier located under your center console. That amplifier is responsible for dividing the audio signal to the individual speakers, as well as controlling the system volume and balance/fader settings (using a data signal from the head unit).
Based on this, I think you can rule out a problem with the factory 6-disk head unit itself. Since it doesn't have separate audio outputs for front/rear, any problem in the head unit that affects the front speakers should affect the rear speakers too. If your rear speakers work normally, then the problem is likely to be in the Bose amplifier, or the speakers themselves. (Even if a problem in the head unit was causing it to fade the output volume to the rear, the volume of your warning chimes shouldn't be affected).
I'm a little unclear on the effects of the sun on your problem. Are you saying that direct sunlight on the left side of the vehicle (for example) will cause the left speaker to work normally? If so, then the problem may be in the speakers. It's possible that water is getting into the speakers or speaker connections in the doors, and the sunlight dries them out.
On the other hand, if the sunlight tends to "fix" both speakers at the same time, then I'd suspect the problem is in the Bose amplifier, located under your center console storage bin.
Hope this helps!
Brian
---------- FOLLOW-UP ----------
QUESTION: Thanks for all the help but, I just found out that the system I have is not a Bose system by running the rpo codes a friend gave me. Its just plan 6-disc Chevy RDS player. Does this make a difference in my problem?
AnswerWill,
It eliminates the Bose amp as a possibility, because there's no separate amplifier in the vehicle if it's not Bose-equipped. It might mean that the head unit is the problem after all, because the 2-channel output I described at first doesn't apply. However, I'm still leaning toward suspecting your speakers or speaker connectors as the source of the problem.
Brian
