Join Date: Aug 2004
Location: State College, PA
I just swapped out my head unit in my 2004 Wrangler last week, so I may be able to give you a few pointers. I'm not exactly sure where the ash tray is located on older models, but it is not on the dash in the 2004's. It is actually just a round ash tray that is placed in what is basically another cupholder on the center console. You don't need to do anything with the ash tray (or the lack thereof) at all.
I'll try to recap some of omnipseudo's steps per the 2004 model:
1) Remove the long, skinny trim piece that is located near the windshield. It is almost as wide as the whole windshield. Just pull up on it and it should pop right out.
2) Remove the two screws that are located at the top of the bezel (surrounds the vents, radio and HVAC controls). You should be able to see these screws provided that you removed the trim piece in step 1. Carefully pull the bezel outwards and upwards and it should come out.
3) Remove your glove box by opening it and detaching the nylon string piece that holds it in place.
4) Reach through your glove box and behind the radio to remove the bolt (don't remember the size) that is located on the lower, right rear portion of the head unit. This step is by far the most difficult just because it's such a small/awkward space to reach your hand.
5) Detach the factory wiring and antenna from the rear of the radio.
If memory serves me correctly, that's about it. Good luck!