Repair Fuses: 2018 Hyundai Tucson Fuse Diagrams and Relay Guide
A car’s electrical system is a complicated network that depends on many different parts to work properly. The usage of fuses, which serve as protective devices to stop damage to electrical components in the event of a short circuit or electrical overload, is essential to maintaining the security of this system. These fuses are kept in a fuse box that is installed in the 2018 Hyundai Tucson, acting as a single location for electrical protection. Fuses are tiny, swappable components made to interrupt an electrical circuit when too much current passes through it. This lessens the chance of damaging wiring and delicate electronic components. Fuse placement in the 2018 Hyundai Tucson is done to protect individual circuits, including those for the air conditioning system, power windows, lights, and more. Comprehending the arrangement and function of every fuse is essential for effective troubleshooting and upkeep.
2023 – 2024 Hyundai Tucson Review, Specs, Price and Mileage (Brochure)
FUSES
A vehicle’s electrical system is protected 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 compartment near the battery.
If any of your vehicle’s lights, accessories, or controls do not work, check the appropriate circuit fuse. If a fuse has blown, the element inside the fuse will be melted or broken.
If the electrical system does not work, first check the driver’s side fuse panel. Before replacing a blown fuse, turn the engine and all switches off, and then disconnect the negative battery cable. Always replace a blown fuse with one of the same rating.
If the replacement fuse blows, this indicates an electrical problem. Avoid using the system involved and immediately consult an authorized HYUNDAI dealer.
Information
Three kinds of fuses are used: blade type for lower amperage ratings, cartridge type, and fusible link for higher amperage ratings.
WARNING
NEVER replace a fuse with anything but another fuse of the same rating.
- A higher capacity fuse could cause damage and possibly cause a fire.
- Do not install a wire or aluminium foil instead of the proper fuse – even as a temporary repair. It may cause extensive wiring damage and possibly a fire.
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.
Instrument Panel Fuse Replacement
- Turn the engine off.
- Turn all other switches OFF.
- Open the fuse panel cover.
- Refer to the label on the inside of the fuse panel cover to locate the suspected fuse location.
- Pull the suspected fuse straight out. Use the removal tool provided in the engine compartment fuses panel.
- Check the removed fuse; replace it if it is blown. Spare fuses are provided in the instrument panel fuse panels (or 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 HYUNDAI dealer.
In an emergency, if you do not have a spare fuse, use a fuse of the same rating from a circuit you may not need for operating the vehicle, such as the cigarette lighter fuse.
If the headlamps or other electrical components 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 with the same rating.
Fuse switch
Always, place the fuse switch to the ON position.
If you move the switch to the OFF position, some items such as the audio system and digital clock must be reset and the smart key may not work properly.
Information
If the fuse switch is OFF, the above message will appear.
NOTICE
- Always place the fuse switch in the ON position while driving the vehicle.
- Do not move the transportation fuse switch repeatedly. The fuse switch may be damaged.
Engine Compartment Panel Fuse Replacement
- Turn the engine off.
- Turn all other switches OFF.
- Remove the fuse panel cover by pressing the tap and pulling 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 HYUNDAI dealer..
CAUTION
After checking the fuse box in the engine compartment securely close the fuse box cover inside the engine compartment, until it clicks.
If the fuse box is not closed properly, water may leak in side, possibly causing a malfunction with the electrical system.
Main fuse
If the main fuse is blown, it must be removed as follows:
- Turn off the engine.
- Disconnect the negative battery cable.
- Remove the fuse panel cover by pressing the tab and pulling it up.
- Remove the nuts shown in the picture above.
- Replace the fuse with a new one of the same rating.
- Reinstall in the reverse order of removal.
Information
If the main fuse is blown, consult an authorized HYUNDAI dealer.
Multi fuse
If the multi fuse is blown, it must be removed as follows:
- Turn off the engine.
- Disconnect the negative battery cable.
- Remove the fuse panel cover by pressing the tab and pulling it up.
- Remove the nuts shown in the picture above.
- Replace the fuse with a new one of the same rating.
- Reinstall in the reverse order of removal.
Information
If the multi fuse is blown, consult an authorized HYUNDAI dealer.
Fuse/Relay Panel Description
Instrument panel fuse panel
Inside the fuse/relay box cover, you can find the fuse/relay label describing fuse/relay name and capacity.
Information
Not all fuse panel descriptions in this manual may be applicable to your vehicle; the information is accurate at the time of printing. When you inspect the fuse box on your vehicle, refer to the fuse box label.
| Fuse Name | Fuse rating | Circuit Protected |
| A/CON1 | 7.5A | A/C Control Module, Cluster Ionizer (Auto A/C), E/R Junction Block (Blower Relay) |
| WIPER RR | 15A | ICM Relay Box (Rear Wiper Relay), Rear Wiper Motor |
| MODULE6 | 10A | BCM, Smart Key Control Module |
| WASHER | 15A | Multifunction Switch (Washer Switch) |
|
MODULE5 |
7.5A |
Crash Pad Switch, Parking Assist Buzzer, BCM, ATM Shift Lever, 4WD ECM, AEB Sensor, Console Switch, Blind Spot Detection Radar LH/RH, Lane Departure Warning Control Module, Lane Keeping Assist Control Module |
| AIR BAG | 15A | SRS Control Module, Passenger Occupant Detection Sensor |
| MODULE1 | 10A | BCM, Smart Key Control Module, AUDIO, A/V & Navigation Head Unit, TMU Module, AMP, Power Outside Mirror Switch, PCB Block (Power Outlet Relay) |
| START | 10A | ICM Relay Box (Burglar Alarm Relay), Transaxle Range Switch |
| MODULE7 | 7.5A | Front Air Ventilation Seat Control Module, Front Seat Warmer Control Module, Rear Seat Warmer |
| HEATED STEERING | 15A | BCM |
| MODULE8 | 7.5A | Driver/Passenger Power Outside Mirror, Center Facia Switch, Key Solenoid, AEB Sensor |
|
MODULE4 |
7.5A |
Data Link Connector, A/C Control Module, Head Lamp LH/RH, A/V & Navigation Head Unit, Electro Chromic Mirror, TMU Module, Front Air Ventilation Seat Control Module, Front Seat Warmer Control Module, Rear Seat Warmer |
| A/BAG IND | 7.5A | Instrument Cluster, Center Facia Switch |
| MODULE3 | 10A | BCM, ATM Shift Lever, IPS Control Module (ON/START Input) |
| SMART KEY1 | 15A | Smart Key Control Module |
| 4WD | 20A | 4WD ECM |
| Fuse Name | Fuse rating | Circuit Protected |
| TAILGATE OPEN | 10A | Tail Gate Open Relay |
| S/HEATER RR | 15A | Rear Seat Warmer |
| MDPS | 7.5A | MDPS Unit |
| SMART KEY3 | 7.5A | Smart Key Control Module, Immobilizer Module |
| CLUSTER | 7.5A | Instrument Cluster (IG1 Power), ATM Shift Lever ILL. |
| SMART KEY2 | 10A | Smart Key Control Module, Start/Stop Button Switch, Immobilizer Module |
| MULTIMEDIA | 15A | Audio, A/V & Navigation Head Unit, TMU Module |
| INTERIOR LAMP | 10A | Ignition Key Ill. & Door Warning Switch, Luggage Lamp, Glove Box Lamp, Overhead Console Lamp, Front Vanity Lamp LH/RH, Room Lamp, Rear Personal Lamp LH/RH |
| DOOR LOCK | 20A | Door Lock Relay, Door Unlock Relay, ICM Relay Box (Two Turn Unlock Relay) |
| SUNROOF2 | 20A | Panorama Sunroof |
| POWER OUTLET | 20A | Front Power Outlet & Cigarette Lighter |
| BRAKE SWITCH | 7.5A | Smart Key Control Module, Stop Lamp Switch |
| MEMORY2 | 10A | Data Link Connector, BCM, Instrument Cluster, A/C Control Module, Auto Light & Photo Sensor, Electro Chromic Mirror, ICM Relay Box (Outside Mirror Folding/Unfolding Relay) |
| P/SEAT (PASS) | 30A | Passenger Seat Manual Switch |
| S/HEATER FRT | 20A | Front Air Ventilation Seat Control Module, Front Seat Warmer Control Module |
| SUNROOF1 | 20A | Panorama Sunroof |
| MODULE2 | 20A | PCB Block (Fuse – ABS3, ECU6, TCU2, MODULE1, MODULE2) |
| A/CON2 | 7.5A | A/C Control Module |
| HEATED MIRROR | 10A | Driver/Passenger Power Outside Mirror, A/C Control Module, ECM (G4FJ) |
| Fuse Name | Fuse rating | Circuit Protected |
| P/SEAT (DRV) | 30A | Driver Seat Manual Switch |
| SAFETY P/WINDOW | 25A | Driver Safety Power Window Module |
| P/WINDOW RH | 25A | Power Window Main Switch, Passenger Power Window Switch |
| P/WINDOW LH | 25A | Power Window Main Switch |
| AMP | 25A | AMP |
Engine compartment fuse panel
Inside the fuse/relay box cover, you can find the fuse/relay label describing fuse/relay name and capacity.
Information
Not all fuse panel descriptions in this manual may be applicable to your vehicle; the information is accurate at the time of printing. When you inspect the fuse panel in your vehicle, refer to the fuse panel label.
| Fuse Name | Fuse rating | Protected Component | |
| MULTI FUSE | MDPS | 80A | MDPS Unit |
| B+1 | 60A | Smart Junction Block (ARISU-LT IPS 1, IPS 2, IPS 3, IPS 4, Fuse – AMP) | |
| B+2 | 60A | Smart Junction Block (ARISU-LT IPS 5, IPS 6, IPS 7, IPS 8, Fuse – SMART KEY1, SMART KEY2, BRAKE SWITCH) | |
| B+3 | 50A | Smart Junction Block (Fuse – SUNROOF1, SUNROOF2, S/HEATER FRT, S/HEATER RR, SAFETY P/WINDOW, Power Window Relay (Fuse – P/WINDOW LH, P/WINDOW RH) | |
| ABS1 | 40A | ESC Module, Multipurpose Check Connector | |
| ABS2 | 40A | ESC Module, Multipurpose Check Connector | |
| IG1 | 40A | Ignition Switch (W/O Smart Key), PCB Block (PDM (IG1)/PDM (ACC) Relay – With Smart Key) | |
| IG2 | 30A | Start Relay, Ignition Switch (W/O Smart Key), PCB Block (PDM (IG2) Relay – With Smart Key) | |
| FUSE | B+4 | 50A | Smart Junction Block (Fuse – MODULE8, 4WD, P/SEAT (DRV), P/SEAT (PASS), TAILGATE OPEN, DOOR LOCK, Leak Current Autocut Device – Fuse Switch, INTERIOR LAMP, MULTIMEDIA, MEMORY2) |
| COOLING FAN1 | 40A | [G4NC] Cooling Fan High Relay | |
| 50A | [G4FJ] Cooling Fan High Relay | ||
| TCU3 | 40A | [G4FJ – 7DCT] TCM | |
| TCU4 | 40A | [G4FJ – 7DCT] TCM | |
| BLOWER | 40A | Blower Relay | |
| POWER TAILGATE | 40A | Power Tail Gate Module | |
| REAR HEATED | 40A | Rear Defogger Relay | |
| Fuse Name | Fuse rating | Circuit Protected |
| WIPER FRT1 | 25A | Ignition Switch (W/O Smart Key), PDM (IG2) Relay (With Smart Key) |
| TCU1 | 15A | [G4FJ] TCM (7DCT) |
| WIPER FRT2 | 10A | BCM |
| ECU3 | 20A | PCM (G4NC) / ECM (G4FJ) |
| HORN | 15A | Horn Relay |
| BATTERY MANAGEMENT | 10A | Battery Sensor |
| SENSOR2 | 10A | [G4NC] Oil Control Valve #1/#2, Camshaft Position Sensor #1/#2, Purge Control Solenoid Valve, Variable Intake Solenoid Valve, Canister Close Valve, Fuel Pump Relay
[G4FJ] Oil Control Valve #1/#2, Purge Control Solenoid Valve, Canister Close Valve, Fuel Pump Relay |
| SENSOR1 | 15A | [G4NC] PCM, Oxygen Sensor (Up)/(Down) [G4FJ] ECM, Oxygen Sensor (Up)/(Down) |
| ECU2 | 20A | IGNITION COIL #1/#2/#3/#4, Condenser (G4NC) |
| ECU5 | 15A | PCM (G4NC) / ECM (G4FJ) |
| ECU4 | 15A | PCM (G4NC) / ECM (G4FJ) |
| SENSOR3 | 10A | [G4NC] E/R Junction Block (Cooling Fan High Relay) [G4FJ] Brake Vacuum Switch, RCV Control Solenoid Valve, E/R Junction Block (Cooling Fan High Relay) |
| DEICER | 15A | E/R Junction Block (Front Deicer Relay) |
| FUEL PUMP1 | 20A | Fuel Pump Relay |
| MODULE1 | 7.5A | O/S Mirror Switch |
| B/ALARM HORN | 10A | E/R Junction Block (B/Alarm Horn Relay) |
| ABS3 | 10A | ESC Module |
| AFLS | 10A | Adaptive Front Light System |
| PCT Heater1 | 50A | PCT Heater 1 |
| PCT Heater2 | 50A | PCT Heater 2 |
| Fuse Name | Fuse rating | Circuit Protected |
| MODULE2 | 10A | [G4FJ] Vacuum Pump |
| POWER OUTLER FRT | 20A | Front Power Outlet & Cigarette Lighter |
| ECU6 | 10A | PCM (G4NC) / ECM (G4FJ) |
| TCU2 | 15A | Transaxle Range Switch, TCM (G4FJ – 7DCT) |
| B/UP LAMP | 10A | PCM (G4NC) / TCM (G4FJ), Transaxle Range Switch, Audio, A/V & Navigation Head Unit, Electro Chromic Mirror, Rear Combination Lamp (IN) LH/RH |
| POWER OUTLER REAR | 20A | Rear Power Outlet |
| ECU1 | 30A | Engine Control Relay |
| E-CVVT1 | 20A | PCM (G4NC) / ECM (G4FJ) |
| E-CVVT2 | 20A | PCM (G4NC) / ECM (G4FJ) |
FAQs
Usually found under the dashboard or in the engine compartment, the fuse box in the 2018 Hyundai Tucson is located. For precise location information, consult your owner’s manual.
A blown fuse can be recognized by a visible break in the wire inside the fuse. The metal link or strip may also seem to be broken or melted.
A blown fuse should always be replaced with one that has the same amperage rating. Fusing something with a different rating could cause damage or electrical problems.
Fuses shield a variety of parts, such as the radio, air conditioning, power windows, headlights, and taillights.
Look up the fuse box diagram on the fuse box cover or in your owner’s manual. It provides an illustration of the fuse positions and how they work.
Replacement fuses don’t always need to come from the original manufacturer, even though it’s usually advised to use the same amperage and kind.
If a fuse continues to blow, there might be an underlying electrical problem. Seek advice from a qualified mechanic to identify and resolve the issue.
It is possible to test a fuse with a multimeter without taking it out. Make sure you have turned off the car before trying this.
No, it isn’t advised. Fuse damage to the electrical system or its components may result from using a higher amperage fuse.
Spare fuses for some cars are kept in the fuse box or a special compartment.
Depending on the component that’s impacted. It’s best to fix blown fuses before driving because they can have an impact on important systems.
Examine fuses on a regular basis when doing routine maintenance or troubleshooting electrical problems.
We do not advise doing so. Utilizing a fuse with a lower rating could result in electrical issues and insufficient protection.
Although there isn’t a set procedure, it’s generally advisable to disconnect the car’s battery prior to changing or removing fuses in order to guarantee safety.
For a thorough diagnosis and repair if you are unable to determine the problem, seek advice from a qualified mechanic or the Hyundai service center.
Useful Links
View Full PDF: 2018 Hyundai Tucson Owner’s Manual| Auto User Guide
2023 – 2024 Hyundai Tucson Review, Specs, Price and Mileage (Brochure)