Hey folks, I'm in need of some assistance. I just bought a 1998 Cavalier yesterday and the car's in pretty good shape, but I'm having a perplexing problem with the radio. AM seems to work well enough, but FM is almost completely non-functional. I say almost because there was a brief 5-minute window in which FM seemed to work okay, but otherwise it's nothing but static no matter what I tune it to. That normally wouldn't be a big deal since I'm planning to buy a new headunit fairly soon, but until I do I planned on using my FM transmitter to play music from my iPhone. I can't get it to work no matter what I set it to, so I know it's not just a matter of bad reception. I know the transmitter works as well, because it works perfectly fine in my other vehicle.

I haven't messed with car audio very much at all, so I'm not even sure where to start. Any ideas?