I have noticed that the speaker on the drivers side doesnt work when my van is cold. If I let it sit in the sun on a hot day then when I start it - it suddenly works however if the AC is turned on, it stops working. I have also noticed the interior lights in the front have glitches - sometimes they turn on when the door is opened, sometimes not. Recently I opened my vent windows in the back and when I went to close them, the passenger side closed fine but the drivers side did not close at all. About a day later, when I got in, started my van the drivers side window didnt open at all, nor did not make any noise. Its like it is stuck. I have a 98 dodge grandcaravan and have changed the battery about 8 months ago or longer. Is there a control module that operates both the rear vent window and the drivers side window that perhaps need replaced because neither are working and stopped at the same time about. Also could there be an electrical problem that would cause the lights to flicker or not work? And as far as the speaker, could it be the wiring...or perhaps the wiring is faulting all of my problems?