Well, I think my JBL system died. I've got a '97 Mark VIII and a few months ago the sound went out on my factory JBL system. I was on my way to Houston and the radio just quit playing. All I was getting from the speakers was periodic bursts of static followed by a high pitched squeel. The radio eventually started playing again, but a few days ago the squeel came back. When/If the radio plays, it only lasts for about 7 seconds and then nothing, or it starts squeeling. I tried a different amp, thinking that was the problem, but I'm getting nothing out of either amp now. One thing I noticed today is that I'm getting feedback from the interior lights. I can hear a low pitched sound that fades out when the interior lights dim. I checked for power coming from the radio in the form of speaker signal output, and there doesn't seem to be a problem there. Also, I've checked the power at the amp, and it seems fine as well. Does anyone have any suggestions? I've checked everything I can think of, including the 3 fuses in the interior panel, and the one under the hood. Is there something I'm missing? Is there a fuse on the amp or radio that I overlooked? Any help would be greatly appreciated as I'm at a total loss. Thanks.