* Under-hood fuse box: This is typically located in the engine compartment, near the battery. It's usually a fairly large black plastic box.
* Interior fuse panel: This is usually located on the driver's side, often under the dashboard. It might be in the lower dash area or even under a small access panel.
To be absolutely certain, consult your 1998 Jeep Wrangler owner's manual. The manual will have diagrams showing the exact location and layout of both fuse boxes. This is the most reliable source of information.