Hi.
I recently bought a 2005 Z touring and this started to happen yesterday.
my front left speaker works.... then when car bumps due to the bad road condition, then it doesnt work and again, when car bumps, it works.
i mean its weird. vice versa, doesnt work, car bumps, it works. is it speaker problem? HU problem? wire got loose and gets connected/disconnected?

 

sounds like a bad connection somewhere. Assuming its stock, I would start with the speaker and work my way up.

 

Troubleshooting intermittent problems is a headache. Yes the problem could be either of these.

 

I would suspect that its at the speaker or the door molex (espeically if there has been a repair on that side of the car in the door area). Now's a good time to upgrade!

 

im going to put avic d3 which was on my G. will that solve this problem?

 

How are we supposed to know? Have you pulled the door panel to see if a terminal is loose???

 

Had same problem. If it's just that speaker it is a loose wire connection either at the speaker terminal or other end. For stock I forget where that is? Amp or Headunit?

 

Its probably at the speaker. Its pretty easy to pull the door panel off to check.

 

same problem here had it for about 3 weeks now left front speaker on off when i hit bumps ,but it doesnt fully not work, when i switch the stereo balance i can still here it just ....gunna get the skin off today im praying for a loose wire around the speaker area !!!.....yours is an old post how did you get on ??....if u can remember that far back lol

 

this to start ^^^

 

having same problem and just replaced stock stereo hoping that would fix it (which it didn't.) i took the door panel off a year ago and didn't find any obvious loose connections.

 

if you hear sound all the time (at various levels) coming from the speaker, then it cant be a loose wire. A loose wire would either give you no sound or full sound. It could be an amplifier channel that's dying.

I'm dealing with something similar, so thats what I think the issue is, in my case anyway.