Most electrical circuits in this sedan and hatchback model are protected by fuses. High-draw electrical components—such as headlights, cooling fan motors, and the fuel pump—are switched via relays. Fuses and relays are housed in power distribution boxes located under the hood, inside the passenger compartment, and in the trunk.
Fuse box diagrams and circuit assignments for 8th-generation Honda Civic models (2005–2012) equipped with the 1.8 L R4 16V 140 hp gasoline engine (R18A).
Passenger Compartment Fuse Box
Located on the driver’s side under the steering column.
To access the fuse box, remove the steering column trim panel (1) followed by the lower dashboard panel (2).
General view.
| Fuse Box Assignment in the Civic 8 Passenger Compartment | ||
|---|---|---|
|
||
| No. | Circuit Protected | A |
| 1 | Power windows | 7.5 |
| 2 | Fuel pump module (fuel pump fuse) | 15 |
| 3 | IG1 ACG (Ignition 1 / Alternator) | 10 |
| 4 | Vehicle Stability Assist (VSA) | 7.5 |
| 5 | Heated seats | 15 |
| 6 | Front fog lights | 20 |
| 7 | - | |
| 8 | - | |
| 9 | Occupant Detection System (ODS) | 7.5 |
| 10 | Instrument cluster | 7.5 |
| 11 | Supplemental Restraint System (SRS) | 10 |
| 12 | Right headlight (high beam) | 10 |
| 13 | Left headlight (high beam) | 10 |
| 14 | Interior lights | 7.5 |
| 15 | Exterior lights | 7.5 |
| 16 | Right headlight (low beam) | 15 |
| 17 | Left headlight (low beam) | 15 |
| 18 | High-beam headlights | 20 |
| 19 | Interior and exterior lighting | 15 |
| 20 | Rear fog light | 7.5 |
| 21 | Low-beam headlights | 20 |
| 22 | IG1 Option Switch | 7.5 |
| 23 | - | |
| 24 | Power sunroof | 20 |
| 25 | Power door locks | 20 |
| 26 | Driver’s power window | 20 |
| 27 | Climate control / HVAC system | 20 |
| 28 | Rear accessory power socket | 20 |
| 29 | Front accessory power socket, cigarette lighter fuse (Honda Civic 8) | 20 |
| 30 | Front passenger power window | 20 |
| 31 | Headlight washers | 20 |
| 32 | Rear right power window | 20 |
| 33 | Rear left power window | 20 |
| 34 | - | |
| 35 | Audio system | 7.5 |
| 36 | IG2 Option Switch | 10 |
| 37 | Daytime Running Lights (DRL) | 7.5 |
| 38 | Windshield wipers | 30 |
| Relay module assignments (upper panel section): | ||
|
||
| R1 | Power window relay | |
| R2 | Fuel pump relay | |
| R3 | Starter relay | |
Engine Compartment Fuse Box
Under-Hood Fuse Box
Located near the battery beneath a protective cover.
General view of the power distribution box.
| Under-Hood Fuse Box Diagram | ||
|---|---|---|
|
||
| No. | Circuit Protected | A |
| 1 | Main battery feed | 100 |
| Electric Power Steering (EPS) | 70 | |
| 2 | Ignition switch | 50 |
| Main body control fuse | 80 | |
| 3 | ABS / VSA motor & control module | 40 |
| 20 | ||
| 4 | Headlights | 50 |
| Power windows | 40 | |
| 5 | Not used | |
| 6 | A/C condenser fan | 20 |
| 7 | Radiator cooling fan | 20 |
| 8 | Rear window defogger | 30 |
| 9 | Blower motor / heater fan | 40 |
| 10 | Hazard lights | 10 |
| 11 | Engine control system / Fuel injection | 15 |
| 12 | Horn, brake lights | 15 |
| 13/14 | - | |
| 15 | Engine oil level sensor | 7.5 |
| 16/17 | Not used | |
| 18 | Ignition coils | 15 |
| 19 | PGM-FI main fuse | 15 |
| 20 | A/C compressor clutch fuse | 7.5 |
| 21 | Electronic Throttle Control (ETC) actuator fuse | 15 |
| 22 | Interior / dome lights | 7.5 |
| 23 | Backup power supply | 10 |
| No. | Relay Function | |
| 24 | Rear window defogger relay | |
| 25 | Blower motor relay | |
| 26 | A/C condenser fan relay | |
| 27 | Radiator cooling fan relay | |
| 28 | Rear window wiper relay | |
| 29 | PGM-FI sub-relay | |
| 30 | Ignition coil relay | |
| 31 | Radiator cooling fan motor diode | |
| 32 | A/C condenser fan motor diode | |
| 33 | A/C compressor clutch relay | |
| 34 | Radiator cooling fan relay #2 | |
| 35 | Electronic Throttle Control (ETC) actuator relay | |
| 36 | PGM-FI Main Relay | |
Auxiliary Fuse Panel (Hybrid Models Only)
On hybrid models, an auxiliary fuse box is located adjacent to the battery.
| Auxiliary Panel Diagram | ||
|---|---|---|
|
||
| No. | Circuit Protected | A |
| 61 | Battery Condition Monitor (BCM) module, Motor Control Module (MCM) relay #2, Servo | 10 |
| 62 | Battery Condition Monitor (BCM) module, Motor Control Module (MCM) relay #1 | 7.5 |
| 63 | Servo control unit | 15 |
| 64 | - | - |
| R1 | Auxiliary cooling system electric pump | |
| R2 | Fuel pump relay | |
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