The radio fuse for a 2004 Hyundai Elantra can be found on the passenger side of the dashboard, behind a small cover marked Fuse Box. The radio fuse is labeled RADIO and is a 10 amp fuse.
To access the radio fuse:
1. Open the passenger side door.
2. Locate the small cover marked Fuse Box.
3. Remove the cover by pulling it straight out.
4. Locate the radio fuse.
5. If the fuse is blown, replace it with a new 10 amp fuse.
6. Reinstall the cover.