Two main fuse boxes protect the Civic’s electrical systems: one in the engine compartment and one inside the cabin on the driver’s side; each lid carries a diagram that maps fuses to circuits.
Fuse box locations
Engine compartment fuse box
In the engine bay, the fuse/relay box is a black plastic enclosure with a removable lid. It is situated toward the front of the engine compartment and is labeled with a diagram showing which fuses protect which systems.
- Engine compartment fuse box contains fuses for major systems such as the engine control unit, ignition, fuel system, cooling fans, headlights, horn, and other high-current circuits. (Exact fuses depend on trim; refer to the lid diagram for specifics.)
Use the diagram on the lid to identify the exact fuse numbers and the circuits they protect. Replace only with the same amperage rating.
Interior fuse box
The interior fuse box is located inside the cabin on the driver’s side, under the dash behind a small panel near the knee area. It houses fuses for interior electronics and accessories.
- Interior fuse box protects circuits such as radio, climate control components, power windows, door locks, interior lights, and other cabin electronics; the lid diagram lists each fuse’s function.
Again, consult the lid diagram or the owner's manual to identify the exact fuse for a given circuit and its amperage.
How to inspect and replace fuses
When a warning light or accessory stops working, you can check fuses safely by following these steps. Always replace with the same amperage rating and handle the vehicle off before inspecting.
- Locate the appropriate fuse using the diagram on the fuse box lid or the owner's manual.
- Remove the fuse with a fuse puller (often built into the lid) or insulated pliers; inspect the metal element for a blown appearance (a broken or melted strip).
- Install a new fuse of the same amperage rating in the same position; never substitute a higher amperage fuse to bypass a fault.
- Reattach the fuse box cover and test the circuit; if the fuse blows again, there may be a fault in the circuit that requires professional diagnosis.
Important caution: If a fuse repeatedly blows, there may be a short circuit, a bad component, or an overload. Avoid bypassing fuses with metals or wire and seek professional help if the problem recurs.
Summary
The 2008 Honda Civic uses two main fuse boxes—engine compartment and interior cabin—to protect electrical circuits. Locate them by the removable lids in the engine bay and under the driver’s dash; always refer to the lid diagrams or the owner's manual for exact fuse designations, and replace fuses with the correct amperage if issues arise.