2020 Kia Optima Fuses and Fuse Box | How to Fix a Blown Fuse
The fuses and fuse box in the 2020 Kia Optima are essential to the proper operation of the car’s electrical systems. Fuses are safety devices that guard against overcurrent damage to the electrical circuits in cars. A blown fuse may be the cause of an electrical component ceasing to function in a given scenario. The fuse box, which is normally located in the engine compartment or under the dashboard on the driver’s side, must be located in order to solve this problem. After determining which fuse is the problem, carefully replace it with a similar amperage fuse (you can find this information on the fuse box cover or in your owner’s manual). This straightforward repair procedure is a must-have for any owner of a Kia Optima since it can rapidly restore the damaged component’s functionality. To identify and address any underlying electrical issues, it’s best to speak with a qualified mechanic if you have any doubts about the procedure or if the problem continues.
FUSES
A vehicle’s electrical system is pro-tected from electrical overload dam-age by fuses. This vehicle has 2 (or 3) fuse panels, one located in the driver’s side panel bolster, the other in the engine com-partment near the battery. If any of your vehicle’s lights, acces-sories, or controls do not work, check the appropriate circuit fuse. If a fuse has blown, the element inside the fuse will melt. If the electrical system does not work, first check the driver’s side fuse panel. If the replacement fuse blows, this indicates an electrical problem. Avoid using the system involved and imme-diately consult an authorized Kia dealer. Three kinds of fuses are used: blade type for lower amperage rating, car-tridge type, and multi fuse for higher amperage ratings.
WARNING – Fuse replacement
- Never replace a fuse with any-thing but another fuse of the same rating.
- A higher capacity fuse could cause damage and possibly a fire.
- Never install a wire or alu-minum foil instead of the proper fuse – even as a tem-porary repair. It may cause extensive wiring damage and a possible fire.
- Do not arbitrarily modify or add-on electric wiring to the vehicle.
CAUTION
Do not use a screwdriver or any other metal object to remove fuses because it may cause a short circuit and damage the system.
NOTICE
- When replacing a fuse, turn the ignition “OFF” and turn off switches of all electrical devices then remove battery (-) terminal.
- The actual fuse/relay panel label may differ from equipped items.
WARNING – Electrical Fire
Always ensure replacements fuses and relays are securely fastened when installed. Failure to do so can result in a vehicle fire.
CAUTION
- When replacing a blown fuse or relay, make sure the new fuse or relay fits tightly into the clips. Failure to tightly install the fuse or relay may cause damage to the wiring and electric systems.
- Do not remove fuses, relays and terminals fastened with bolts or nuts.The fuses, relays and terminals may not be fas-tened correctly which may cause vehicle damage.
- Do not input any other objects except fuses or relays into fuse/relay terminals such as a screwdriver or wiring. It may cause contact failure and sys- tem malfunction.
- Do not plug in screwdrivers or aftermarket wiring into the terminal originally designed for fuse and relays only. The electrical system and wiring of the vehicle interior may be damaged or burned due to contact failure.
- If you directly connect the wire on the taillight or replace
the bulb which is over the regulated capacity to install trailers etc., the inner junction block can get burned. - Visually inspect the battery cap to ensure it is securely closed. If the battery cap is not securely closed, moisture may enter the system and damage the electri-cal components.
WARNING – Electrical wiring repairs
All electrical repairs should be performed by authorized Kia dealerships using approved Kia parts. Using other wiring com-ponents, especially when retro-fitting AVN or theft alarm sys-tem, remote engine control, car phone or radio may cause vehi-cle damage and increase the risk of a vehicle fire.
NOTICE – Remodeling Prohibited
Do not rewire your vehicle in any way as doing so may affect the per-formance of several safety features in your vehicle. Rewiring your vehi-cle may also void your warranty and cause you to be responsible for any subsequent vehicle damage which may result.
NOTICE – Window tinting precaution
Window tint (especially metallic film) might cause communication errors or poor radio reception, and malfunctioning automatic lighting system due to reflections from the mirror tint inside the vehicle. The solution used might also leak into the electronic components, causing malfunctions or damage.
Inner panel fuse replacement
- Turn the ignition switch and all other switches off.
- Open the fuse panel cover.
If the switch is located in the “OFF” position, a caution indicator will be displayed in the cluster. To identify the location of a specific fuse, please refer to the inside of the fuse panel cover and the escription list in this section.
- Pull the suspected fuse straight out. Use the removal tool provided on the engine compartment fuse panel cover.
- Check the removed fuse; replace it if it is blown.
Spare fuses are provided in the engine compartment fuse panel. - Push in a new fuse of the same rating, and make sure it fits tightly in the clips.
If it fits loosely, consult an authorized Kia dealer. If you do not have a spare, use a fuse of the same rating from a circuit you may not need for operating the vehicle, such as the power outlet fuse. If the head lamp, turn signal lamp, stop signal lamp, fog lamp, DRL, tail lamp, HMSL do not work and the fuses are OK, check the fuse panel in the engine compartment. If a fuse is blown, it must be replaced.
NOTICE
If the headlamp, fog lamp, turn sig-nal lamp, or tail lamp malfunction even without any problem to the lamps, have the vehicle checked by an authorized Kia dealer for assis-tance.
Fuse switch
Always set the fuse switch to the ON position before using the vehicle.
If you move the switch to the OFF position, some items such as audio and digital clock must be reset and transmitter (or smart key) may not work properly. When the switch is Off, the caution indicator will be dis-played on the instrument cluster.
CAUTION – Fuse Panel Covers
The contact points of the switches may wear out with excessive use. Please refrain from excessive use of the switches (except for long-term parking for over 1 month).
NOTICE
If the vehicle is going to be unused for over 1 month, set all switches to OFF to prevent the batteries from draining.
Engine compartment fuse replacement
- Turn the ignition switch and all other switches off.
- Remove the fuse panel cover by pressing the tab and pulling the cover up.
- Check the removed fuse; replace it if it is blown. To remove or insert the fuse, use the fuse puller in the engine compartment fuse panel.
- Push in a new fuse of the same rating, and make sure it fits tightly in the clips. If it fits loosely, consult an authorized Kia dealer.
CAUTION
Always securely install the fuse panel cover in the engine com-partment to protect against electrical failure which may occur from water contact. Listen for the audible clicking sound to ensure fuse panel cover is securely fastened.
Multi fuse
NOTICE
Do not disassemble nor assemble the multi fuse when it is secured with nuts and bolts. Incorrect or partial assembly torque may cause a fire. Have the vehicle checked by an authorized Kia dealer.
Main fuse
NOTICE
Do not disassemble nor assemble the multi fuse when it is secured with nuts and bolts. Incorrect or partial assembly torque may cause a fire. Have the vehicle checked by an authorized Kia dealer. The electronic system may not func-tion correctly even when the engine compartment and internal fuse box’s individual fuses are not dis-connected. In such case the cause of the problem may be disconnection of the main fuse (BFT type), which is located inside the positive battery terminal (+) cap. Since the main fuse is designed more intricately than other parts, have the vehicle checked by an authorized Kia dealer.
CAUTION
Visually inspect the battery cap to ensure it is securely closed. If the battery cap is not securely closed, moisture may enter the system and damage the electri-cal components.
Fuse/relay panel description
Driver’s side fuse panel
Inside the fuse/relay panel covers, you can find the fuse/relay label describing fuse/relay name and capacity.
NOTICE
Not all fuse panel descriptions in this manual may be applicable to your vehicle. It is accurate at the time of printing. When you inspect the fuse panel in your vehicle, refer to the fuse panel label on the inside of the fuse cover. This diagram will provide you with the specific infor-mation for your vehicles
Instrument panel (Driver’s side fuse panel)
| Fuse Name | Fuse rating | Circuit Protected |
| MODULE 7 | 10A | Around View Unit, Front Air Ventilation Seat Control Module, Front Seat Warmer Control Module, Rear Seat Warmer Control Module |
|
MODULE 5 |
10A |
A/C Control Module, Electro Chromic Mirror, Crash Pad Switch, Head Lamp LH/RH, Auto Head Lamp Leveling Device Module, A/V & Navigation Head Unit, Fuel Lid & Trunk Open Switch, Shift Lever Indicator, Driver IMS Module, Driver IMS Module, Front Air Ventilation Seat Control Module, Front Seat Warmer Control Module, Rear Seat Warmer Control Module |
| MODULE 6 | 10A | BCM, Smart Key Control Module |
| A/CON | 10A | A/C Control Module, E/R Junction Block (Blower Relay) |
| START | 10A | [W/O Smart Key & IMMO.] ICM Relay Box (Burglar Alarm Relay)
[With Smart Key / IMMO.] Transmission Range Switch, PCM (G4KH/G4KJ) |
| A/BAG | 15A | SRS Control Module, Passenger Occupant Detection |
| MODULE 3 | 10A | BCM, ATM Shift Lever, Stop Lamp Switch, DBL Unit, Keyboard, A/C Control Module |
| MODULE 4 | 10A | Console Switch, Blind Spot Detection Radar LH/RH, Smart Cruise Control Unit, AEB Module, Lane Keeping Assist Module |
|
INTERIOR LAMP |
10A |
Trunk Room Lamp, Ignition Key Ill. & Door Warning Switch, Glove Box Lamp, Driver/Passenger Smart Key Outside Handle, Front Vanity Lamp Switch LH/RH, Overhead Console Lamp, Center Room Lamp, Center Personal Lamp, Rear Personal Lamp LH/RH, Driver/Passenger Scuff Lamp |
| MDPS | 10A | MDPS Unit (Column/Rack), Steering Angle Sensor |
| IG1 | 25A | PCB Block (Fuse – TCU 2, ABS 3, ECU 3, VACUUM PUMP 2) |
| MODULE 9 | 10A | Immobilizer Module, Smart Key Control Module |
| Fuse Name | Fuse rating | Circuit Protected |
| WASHER | 15A | Multifunction Switch (Wiper Low & Washer Switch) |
| MODULE 8 | 10A | A/C Control Module, Driver/Passenger Door Module |
| CLUSTER | 10A | Instrument Cluster (IG1) |
| MULTI MEDIA | 15A | Audio, A/V & Navigation Head Unit, Keyboard |
| HEATED STEERING | 15A | BCM (Steering Wheel Heated) |
| MODULE 1 | 10A | Console Switch, Key Solenoid, Driver/Passenger Door Module, BCM |
| DR LOCK | 20A | Door Lock Relay, Door Unlock Relay |
| SMART KEY | 15A | Smart Key Control Module |
| A/BAG IND | 10A | Instrument Cluster (Air Bag IND. Power) |
| TRUNK | 10A | Trunk Lid Relay, Fuel Filler & Trunk Open Switch, Trunk Lid Motor, ICM Relay Box (Fuel Filler Open Relay) |
| SUNROOF 2 | 20A | Sunroof Control Unit (Roller) |
|
MEMORY 1 |
10A |
Instrument Cluster, A/C Control Module, Data Link Connector, Wireless Charger, Driver IMS Module, Rain Sensor, ICM Relay Box (Outside Mirror Folding/Unfolding Mirror Relay), Security Indicator, Auto Light & Photo Sensor, Driver/Passenger Door Module, Electro Chromic Mirror |
| S/HEATER RR | 25A | Rear Seat Warmer Control Module |
| SUNROOF 1 | 20A | Sunroof Control Unit (Glass) |
| Fuse Name | Fuse rating | Circuit Protected |
| S/HEATER FRT | 25A | Front Air Ventilation Seat Control Module, Front Seat Warmer Control Module |
|
MODULE 2 |
10A |
Audio, A/V & Navigation Head Unit, Keyboard, Around View Unit, AMP, Power Outside Mirror Switch, Smart Key Control Module, BCM, Wireless Charger, Rear USB Charger #1/#2, E/R Junction Block (Power Outlet Relay) |
| P/WINDOW RH | 25A | Power Window RH Relay, Rear Power Window Switch RH, Power Window Main Switch, Passenger Safety Power Window Module |
| P/SEAT PASS | 25A | Passenger Seat Manual Switch, Walk In Relay Module, Passenger Reclining Limit Switch |
| AMP | 25A | AMP (JBL) |
| BRAKE SWITCH | 10A | Stop Lamp Switch, Immobilizer Module, Smart Key Control Module, Start/Stop Button Switch |
| P/WINDOW LH | 25A | Power Window LH Relay, Rear Power Window Switch LH, Power Window Main Switch, Driver Safety Power Window Module |
| P/SEAT DRV | 30A | Driver Seat Manual Switch, Driver IMS Module |
| POWER OUTLET | 20A | Front Power Outlet #1, Front Cigarette Lighter & Power Outlet #2 |
Engine compartment fuse panel
Engine room compartment fuse panel
| Fuse Name | Fuse rating | Circuit Protected | |
|
MULTI FUSE |
MDPS 1 | 80A | MDPS Unit (Column) |
| COOLING FAN 2 | 60A | [G4KH/G4FJ] Cooling Fan1 Relay, Cooling Fan2 Relay | |
| COOLING FAN 1 | 50A | [G4KJ] Cooling Fan1 Relay | |
| B+ 3 | 50A | Smart Junction Block (IPS 2 (IPS 5), IPS 3 (IPS 6), IPS 7, IPS 8) | |
| REAR HEATED | 50A | Rear Heated Relay | |
| DCT1 | 40A | [G4FJ-DCT] TCM | |
| BLOWER | 40A | Blower Relay | |
| POWER OUTLET 1 | 40A | Power Outlet Relay | |
| IG2 | 30A | [W/O Smart Key] Start Relay, Ignition Switch, [With Smart Key] Start Relay, PCB Block (IG2 Relay) | |
| MDPS 2 | 100A | MDPS Unit (Rack) | |
| B+1 | 60A | Smart Junction Block (Fuse – SUNROOF1, SUNROOF2, S/HEATER RR, P/SEAT DRV, P/SEAT PASS, P/WINDOW LH, P/WINDOW RH, TRUNK) | |
| B+5 | 60A | PCB Block (Engine Control Relay, Fuse – TCU1, ECU2, FUEL PUMP, HORN, WIPER1) | |
| B+2 | 60A | Smart Junction Block (IPS 1, IPS 4, Fuse – AMP, S/HEATER FRT) | |
| ABS 1 | 40A | ESC Module | |
| IG1 | 40A | [W/O Smart Key] Ignition Switch, [With Smart Key] PCB Block (IG1/ACC Relay) | |
| DCT 2 | 40A | [G4FJ-DCT] TCM | |
| ABS 2 | 30A | ESC Module, Multipurpose Check Connector | |
| Fuse Name | Fuse rating | Circuit Protected | |
|
FUSE |
B+4 | 40A | Smart Junction Block (Leak Current Autocut Device Fuse – INTERIOR LAMP, MEMORY1, MULTI MEDIA, Fuse – DOOR LOCK, MODULE1, SMART KEY, BRAKE SWITCH) |
| E-CVVT 1 | 40A | E-CVVT Relay | |
| VACUUM PUMP 1 | 20A | Vacuum Pump | |
| DEICER | 20A | Deicer Relay | |
| AMS | 10A | Battery Sensor | |
| E-CVVT 2 | 20A | PCM | |
| A/CON | 10A | A/C Control Module | |
| E-CVVT 3 | 20A | PCM | |
| HEATED MIRROR | 10A | A/C Control Module, Driver/Passenger Power Outside Mirror, ECM | |
| WIPER 2 | 10A | BCM, PCM/ECM | |
| H/LAMP HI | 20A | Head Lamp HI Relay | |
| FUEL PUMP | 20A | Fuel Pump Relay | |
| Fuse Name | Fuse rating | Circuit Protected | |
|
FUSE |
ECU 1 | 20A | PCM/ECM |
|
SENSORS 2 |
10A |
E/R Junction Block (Fuel Pump Relay, Cooling Fan 1/2 Relay)
[G4KJ] Oil Control Valve (Exhaust), Purge Control Solenoid Valve, Variable Intake Solenoid Valve, Canister Close Valve [G4KH] Oil Control Valve (Exhaust), Purge Control Solenoid Valve, RCV Control Solenoid Valve, Canister Close Valve [G4FJ] Oil Control Valve #1/#2, Purge Control Solenoid Valve, RCV Control Solenoid Valve, Canister Close Valve |
|
| TCU 2 | 15A | Transmission Range Switch, TCM | |
| ABS 3 | 10A | ESC Module, Multipurpose Check Connector | |
| POWER OUTLET 3 | 20A | Rear Power Outlet | |
| B/UP LAMP | 10A | PCM/TCM, Transmission Range Switch, Audio, Electro Chromic Mirror, Rear Combination Lamp (IN) LH/RH | |
| SENSOR 1 | 15A | Oxygen Sensor (Up/Down) | |
| IGN COIL | 20A | Ignition Coil #1/#2/#3/#4 | |
| ECU 2 | 10A | PCM/ECM | |
| TCU 1 | 10A | PCM/TCM | |
| VACUUM PUMP 2 | 10A | Vacuum Pump, Vacuum Switch | |
| ECU 3 | 10A | PCM/ECM | |
| POWER OUTLET 2 | 20A | Front Power Outlet #1 | |
| HORN | 20A | Horn Relay, ICM Relay Box (Burglar Alarm Horn Relay) | |
| WIPER 1 | 30A | Wiper Power Relay | |
Engine compartment fuse panel (Battery terminal cover)
NOTICE
Not all fuse panel descriptions in this manual may be applicable to your vehicle. It is accurate at the time of printing. When you inspect the fuse panel in your vehicle, refer to the fuse panel label.
FAQs
The fuse box in the 2020 Kia Optima is typically located in the engine compartment. Refer to the owner’s manual for the exact location.
The vehicle may have more than one fuse box. Common locations include the engine compartment and the interior, often near the driver’s side.
The vehicle typically uses blade-type fuses. Check the owner’s manual for the specific amperage and type information.
Check the fuse box for the respective lighting fuses. If a fuse is blown, replace it with a new one of the same amperage.
Avoid overloading electrical circuits, and if you notice recurrent blown fuses, have the electrical system inspected for potential issues.
A fuse puller or a pair of needle-nose pliers can be used to safely remove and replace fuses.
Always use a fuse with the same amperage rating as the one you are replacing. Using a different amperage can cause electrical problems.
The amperage of each fuse is typically marked on the fuse itself. The fuse box cover or owner’s manual also provides information.
Check the fuse related to the power windows in the fuse box. Replace any blown fuse with a new one of the same amperage.
No, using a higher amperage fuse can lead to electrical damage. Always use the correct amperage specified for your vehicle.
You can use needle-nose pliers to carefully grip and pull out a fuse. Be cautious not to damage the fuse or surrounding components.
Check the fuse box for the corresponding fuse and replace any blown fuse with a new one.
While routine checks may not be necessary, check fuses if you experience electrical issues in your vehicle.
Some vehicles come with spare fuses. Check the fuse box cover or owner’s manual for information on spare fuses.
If the problem persists, or if you cannot identify the issue, consult a professional mechanic or the dealership for assistance.
Useful Link
View Full PDF: Kia Optima 2020 User Manual
2023 KIA SPORTAGE Specs, Price, Features and Mileage (Brochure)