* Under the hood: This is the more common location for the main fuse box. It's usually located near the battery, often on the driver's side fender well. It's a fairly large box.
* Inside the vehicle: A smaller fuse panel is typically located inside the vehicle, often on the driver's side dashboard. This one usually houses fuses for interior accessories.
To be certain: The best approach is to consult your 1987 Jeep Wrangler's owner's manual. It will have a diagram showing the exact location and function of each fuse. If you don't have the manual, you can often find a digital copy online by searching for "[your specific Wrangler trim level] owner's manual 1987 PDF".