RE: no sound
I am having a similar problem. None of the speakers in my Mark make any noise. I also thought I was dealing with a dying/dead amp, and just wanted to bypass it. After wracking my brain on a good way to go about doin that, I went to the stereo store. So I bought an amplifier bypass cable to hook to two large clips that go into the amp together, and a harness to wire up an aftermarket cd player. So I put the bypass cable between the clips and wire up the new cd player only to turn on the key and see the cd player light up and play a cd without as much as a beep. I called an installer buddy of mine and he said to get a multimeter and check the impedence on all of the speakers because with the JBL system having the amp in the trunk and power of the cd player if you have one bad speaker, everything else shuts off. So with that being the case, I really need to know the best way to get to all of the speakers to check them with the meter. Can I do it in the trunk with one of the harnesses? Let me know what you think, and maybe you can help me out? Talk to you all later.
Nate