2023 Honda Civic Fuse Box Diagram & Amp Ratings

As an ASE-certified master technician, I know that dealing with electrical gremlins can be frustrating. Whether your infotainment screen just went dark or your 12V accessory socket stopped charging your phone, the first and easiest step in electrical diagnosis is checking the fuses.

This guide covers the 2023 Honda Civic (11th generation). Below, you will find the fuse box locations, comprehensive diagrams with amperage and color codes, and tips for testing your fuses. Keep in mind that exact fuse assignments can vary slightly depending on your Civic’s trim level (LX, Sport, EX, Touring, or Si/Type R) and optional equipment. Always verify with the printed legend on the inside of your fuse box lid.

Quick answer: Where are the fuse boxes on a 2023 Honda Civic?

The 2023 Honda Civic features two primary fuse boxes:

1. Under-Hood Fuse Box (Engine Compartment): Located on the driver’s side of the engine bay, right next to the battery and the brake fluid reservoir. To open it, squeeze the tabs on the side of the cover and lift.
2. Interior Fuse Box (Driver's Dash): Located under the driver’s side dashboard, just above the pedals. Look up under the steering column area.

Note: Unlike some larger sedans or luxury vehicles, the 2023 Honda Civic does not have a trunk or rear cargo fuse box.

Under-Hood Fuse Box Diagram

The under-hood fuse box houses high-amperage main fuses, relays, and protects critical engine and exterior components like the ECM/PCM, headlights, ABS, and cooling systems.

Relay Locations: The under-hood box also contains relays for the A/C Compressor Clutch, Starter Relay, Radiator Fan, Horn, and PGM-FI Main Relay. They are typically square black or gray blocks.

Interior Fuse Box Diagram (Driver's Kick-Panel)

The interior fuse box protects the cabin components, including the infotainment system, fuel pump, airbags, power windows, and interior lighting.

How to test a fuse

It's common to just pull a fuse and look at it, but visual inspections can sometimes be misleading. A micro-fracture in the fuse element might be invisible to the naked eye. Here is the ASE-certified method for testing fuses quickly:

1. Use a Test Light: Ground the clip of a 12V automotive test light to a bare metal bolt on the chassis. Turn the ignition to the "ON" position (do not start the engine).
2. Probe the Test Points: On the top of modern blade fuses, there are two tiny metal test points exposed. Touch the tip of your test light to one side, then the other.
3. Read the Results:
   • If the light illuminates on both sides, the fuse is good.
   • If the light illuminates on one side but not the other, the fuse is blown and must be replaced.
   • If it lights up on neither side, the circuit currently has no power (e.g., headlights are switched off, or an upstream relay is open).
4. Using a Multimeter: Alternatively, pull the fuse and set your digital multimeter to the continuity setting (the one that beeps). Touch a probe to each leg of the fuse. A continuous beep means the fuse is good.

Important Rule: Never replace a blown fuse with one of a higher amperage. This can cause the wiring harness to overheat, melt, or start a fire. Always replace a 10A fuse with a 10A fuse.

Common blown fuses on this vehicle

Based on what we see in the service bays, here are the most frequently blown fuses on the newer 11th-gen Honda Civics, and what you should check if they pop:

• 12V Accessory Socket (Fuse #6 - Interior): This is by far the most common. Dropping a coin into the 12V port or using a cheap, short-circuited phone charger will pop this 20A yellow fuse instantly. Check inside the port for debris before replacing the fuse.
• Audio/Radio (Fuse #7 - Interior or Fuse #14 - Under-hood): If your center infotainment screen goes totally black and won't reset, one of these fuses may have popped, sometimes due to a software glitch drawing too much current during a boot cycle.
• A/C Clutch (Fuse #15 - Under-hood): If the air conditioning is blowing warm but the blower motor is working, check this 7.5A fuse. If it continues to blow, the A/C compressor clutch coil may be shorting out.
• Fuel Pump (Fuse #2 - Interior): If the car cranks strong but absolutely will not start, check the fuel pump fuse. While rare on a brand new 2023 model, any aftermarket security installs or remote starters spliced incorrectly can cause this fuse to pop.

If you keep blowing fuses and cannot find the source of the short circuit, do not keep throwing new fuses at the problem. It is time to get a professional diagnostic.

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