The 2018 Honda Civic keeps its fuses in two spots: an engine‑bay fuse/relay box and an interior fuse box behind the glove box. The exact fuse numbers and amperages are printed on the lids and are also spelled out in the owner's manual. This guide walks you through locating and accessing both boxes so you can inspect or replace fuses safely.
Fuse boxes in the 2018 Honda Civic
Engine compartment fuse box (under the hood)
Access the main fuse box in the engine bay by opening the hood and locating the black plastic cover on the driver's side of the engine compartment. The cover has a diagram showing fuse numbers and their corresponding circuits.
Before you remove the cover, make sure the engine is off and the keys are out. After you remove the cover, you can see the fuses and relays listed in the diagram. Replace with the same amperage rating; if a fuse is blown, pull it out and inspect or replace it.
- Fuses for engine management and electronic control modules (ECMs/PCMs, ignition, fuel system).
- Fuses for ABS, traction control, and other powertrain systems.
- Fuses for charging and cooling system components (alternator, radiator fan, sensors).
- Fuses for exterior and other high-demand circuits (headlights, horns, some accessory circuits).
The engine compartment fuse box contains a mix of high‑demand and control fuses. The exact layout and amperage ratings are printed on the lid, and the owner’s manual also lists them by number.
Interior fuse box behind the glove box
Inside the cabin, the secondary fuse box sits behind the glove box on the passenger side. To reveal it, open the glove box and gently lower or remove the damper to access the fuse panel cover. The lid includes a diagram with fuse numbers and their functions.
Before you remove the cover, ensure the ignition is off. After removing the panel, you’ll see a row of fuses and a fuse puller stored on the lid or inside the box. Replace with the same amperage rating and reassemble.
- Fuses for the infotainment system, dashboard displays, and other interior electronics.
- Fuses for power windows, door locks, and central locking.
- Fuses for interior lighting, dash illumination, and HVAC controls.
- Fuses for cruise control, auxiliary power outlets, and other cabin amenities.
Both fuse boxes share the same basic purpose: to protect electrical circuits and provide a replaceable fuse for faults. Always use the same amperage as specified, and if a fuse repeatedly blows, consult a mechanic for a deeper electrical diagnosis.
Summary
The 2018 Honda Civic has two accessible fuse boxes: one under the hood in the engine compartment and one inside the cabin behind the glove box. Use the diagrams on each lid to identify the proper fuses, replace blown fuses with the same amperage, and consult the owner’s manual for exact layouts and fuse ratings. If in doubt, seek professional assistance to avoid electrical damage.