1. Locate the under-dash fuse box: This is typically located on the driver's side, under the dashboard, near the steering column. You might need a flashlight.
2. Open the fuse box cover: There's usually a clip or latch securing the cover. Gently pry it open.
3. Examine the fuse box: The 2004 Pilot's under-dash fuse box contains both driver's side and passenger's side fuses. The diagram on the inside of the cover will show which fuses correspond to passenger-side circuits. They're not in a separate compartment.
There's no separate passenger-side fuse box. The entire fuse panel is in the single location under the dashboard on the driver's side. Your owner's manual should have a detailed diagram of the fuse box layout.