Honda Civic 2018 Fuse Replacement
Having an electrical issue? It could be a blown fuse — an easy fix you can do yourself.
Follow the steps below to find and replace the fuse:
Step 1: Find the Fuse Box
In your Honda Civic 2018, the interior fuse box is typically located under the dashboard on the driver's side. Some vehicles also have an additional fuse box in the engine compartment. Check your owner's manual or the fuse box cover for the exact location.
Step 2: Identify the Corresponding Fuse
Below is the complete fuse list for your vehicle. Find the circuit that isn't working and note the fuse number and amperage.
Passenger compartment Fuse Box
| Fuse # | Function | Amperage |
|---|---|---|
| 1 | Accessory | 10 |
| 2 | Not Used (with smart entry system) Key Lock (without smart entry system) | |
| 3 | Spare | |
| 4 | Front Sensor Camera (with smart entry system) Transmission (without smart entry system) (Continuously variable transmission models) | |
| 5 | Option | 10 |
| 6 | SRS Indicator | 10 |
| 7 | Meter | 10 |
| 8 | Fuel Pump | 15 |
| 9 | AIRCON | 10 |
| 10 | Spare | |
| 11 | Engine Control | 5 |
| 12 | Passenger Side Door Lock | 10 |
| 13 | Driver Side Rear Door Unlock | |
| 14 | Rear Driver's Side Power Window | |
| 15 | Front Passenger's Side Power Window | 20 |
| 16 | Door Lock | 20 |
| 17 | Transmission (with smart entry system) (Continuously variable transmission models) Front Sensor Camera (without smart entry system) | |
| 18 | Spare | |
| 19 | Moon roof (option) | |
| 20 | Spare | |
| 21 | ACG | 10 |
| 22 | Daytime Running Lights | 10 |
| 23 | Spare | |
| 24 | Front Sensor Camera (option) | |
| 25 | Driver's Door Lock | 10 |
| 26 | Passenger Side Door Unlock | 10 |
| 27 | Rear Passenger's Side Power Window | |
| 28 | Driver's Power Window | 20 |
| 29 | Front Accessory Power Socket | 20 |
| 30 | Smart Entry (with smart entry system) Not Used (without smart entry system) | 10 |
| 31 | Driver's Power Seat Reclining (option) | |
| 32 | Front Seat Heater (option) | |
| 33 | Driver's Power Seat Sliding (option) | |
| 34 | VSA/ABS | 10 |
| 35 | SRS | 10 |
| 36 | Spare | |
| 37 | Spare | |
| 38 | Driver Side Rear Door Lock | |
| 39 | Driver's Door Unlock | 10 |
Engine compartment Fuse Box
| Fuse # | Function | Amperage |
|---|---|---|
| 1 | Passenger's Power Seat (option) Rear Seat Heaters (option) | |
| 1 | Cooling Fan (2.0L) | |
| 1 | Cooling Fan (1.5L) | |
| 1 | Spare | |
| 1 | IG Main (with smart entry system) Not Used (without smart entry system) | 30 |
| 1 | Headlight High Beam Main | 30 |
| 1 | Battery | 125 |
| 2 | EPS | 70 |
| 2 | IG Main (30 A (with smart entry system) / 50 A (without smart entry system)) | 30 |
| 2 | Fuse Box Option (option) | |
| 2 | Fuse Box | 60 |
| 2 | Front Wiper Motor | 30 |
| 2 | Headlight Low Beam Main | 30 |
| 3 | Rear Defroster | 40 |
| 3 | Starter Motor (with smart entry system) Not Used (without smart entry system) | 30 |
| 3 | Fuse Box | 40 |
| 3 | ABS/VSA Motor | 40 |
| 3 | ABS/VSA FSR | 40 |
| 3 | Blower Motor | 40 |
| 4 | Spare | |
| 4 | Spare | |
| 4 | Spare | |
| 4 | Spare | |
| 5 | Cooling Fan | 5 |
| 6 | Washer | 15 |
| 7 | FI Main | 15 |
| 8 | FI Sub | 15 |
| 9 | Stop Lights | 10 |
| 10 | Injector (1.5L) | |
| 11 | LAF | 5 |
| 12 | FI ECU | 10 |
| 13 | Parking Lights | 10 |
| 14 | Hazard | 15 |
| 15 | IG Coil | 15 |
| 16 | Transmission (Continuously variable transmission models) | |
| 17 | Daytime Running Lights | 10 |
| 18 | Back Up | 10 |
| 19 | Audio | 15 |
| 20 | Audio AMP (option) | |
| 21 | Interior Lights | 10 |
| 22 | Front Fog Lights (option) | |
| 23 | A/C Compressor (option) | |
| 24 | Horn | 10 |
| 25 | Left Headlight Low Beam | 10 |
| 26 | Right Headlight Low Beam | 10 |
| 27 | VB ACT (1.5L) | |
| 28 | Left Headlight High Beam | 10 |
| 29 | Right Headlight High Beam | 10 |
| 30 | Spare | |
| 31 | Rear Seat Heaters | |
| 32 | Passenger's Power Seat Sliding (option) | |
| 33 | Passenger's Power Seat Reclining (option) | |
| 34 | Spare | |
| 35 | Spare | |
| 36 | Spare |
Step 3: Check the Fuse
Use the plastic fuse puller, typically found in the fuse box, to remove the fuse. Hold it up to a light source. If the metal filament inside is broken or charred, the fuse is bad and needs to be replaced.
Step 4: How to Get a Replacement
You can buy a replacement fuse at any auto parts store. Make sure you match the **amperage (A)** and **physical size** of the fuse exactly. For example, if you need a 20A fuse, get a 20A fuse.
Step 5: Replace the Fuse
Gently press the new fuse into the empty slot. You should feel a slight click when it's securely in place. Test the affected circuit to confirm it's working again.
What Now?
Fuse Was Blown — What to Buy
Ask at any auto parts store (AutoZone, O'Reilly, Advance Auto) for a blade fuse with the same amperage printed on the old one (e.g., 10A, 15A, 20A). Also match the physical size — mini (most modern cars), standard, or maxi. Replacement fuses cost under $5 and most stores sell assorted packs.
Fuse Looks Fine — Other Causes
If the fuse is intact, the problem isn't a blown fuse. Common alternatives include a bad relay (a click-sized electrical switch), a faulty wiring connection, or a failed component (motor, switch, module). At this point, a mechanic's diagnostic is the most reliable next step.
Frequently Asked Questions
What happens if I put in the wrong amperage fuse?
Higher amperage fuses won't protect the circuit and can cause wiring damage or fire. Lower amperage fuses will blow again immediately. Always match the exact amperage.
Why does my fuse keep blowing?
A repeatedly blown fuse indicates an underlying short circuit or overload. Replacing it again won't fix the root cause — consult a mechanic.
Do I need any tools?
Most cars come with a plastic fuse puller in the fuse box lid. If not, fine-tip needle-nose pliers work. A small flashlight helps.
How do I know what size fuse to buy?
Match the amperage printed on the old fuse (e.g., 10A, 15A, 20A) and the physical blade size (mini, standard, maxi). Auto parts stores carry assorted packs.