This has been discussed many times here before, and I thought I would bring all of the information together in a "how-to." I have not had to do this personally, but nobody rides in the passenger seat of my car to make it necessary.
Problem: Radio Reception is bad to non-existant. AM is usually worse than FM.
Reason: Antenna connector has come loose, and needs to be reconnected. This happens when a passenger pushes the carpet toward the firewall and disconnects the plug.
Affected Model Years: 1997, 1998, 1999, 2000, 2001, 2002, 2003
Permanent Fix:
1. First check to make sure the antenna at the back of the radio has not come loose.
2. Remove the plastic cover on the front passenger door threshold held in place by three pressure clips.
3. Peel back the carpet on the front seat passenger floor.
4. Locate the coax antenna cable running along the side.
5. Reconnect the two pieces of antenna that have come loose.
6. Roll the carpet back, and re-install the threshold cover.