OK, I'm just post all of my TJ problems, because the help on the last one was awesome:
2001 TJ 5L
For the last two years, I haven't used the stereo in the Jeep because the sub was cutting in and out and I can't listen to Brittany or Disturbed that flat. Well, with Brittany, it didn't make a difference. I bought a new deck (another JVC with the same harnessing) thinking that it was the deck. This didn't help. I would get bass and then flat - rinse and repeat. I tried to Fonz it (ehhhhhhhhhh), no dice. Finally after a while, there was no bass at all.
I rechecked the "harness" for the deck (slides into a metal chassis), used compressed air to blow out any debris and checked the fuse. There is no change if I hit a bump. I haven't taken apart the console.
So, yes, I should take out my multimetre and test the links, but I'm wondering if anyone else has had this problem and can quickly point me in the right direction. I'm an Enron day-trader and I need to keep an eye on my investment.