2020 Lexus ES300H Fuses and Fuse Box | How To Check and Fix
The fuses and fuse box in the 2020 Lexus ES300H are very important for keeping the car’s electrical parts safe from damage that could come from electrical overloads. Most of the time, the switch box is easy to get to inside the car, like under the dashboard or in the engine bay. Before you can check for and fix a blown fuse, you should look in your car’s owner’s manual to find the fuse that goes with the broken part. Carefully take the broken fuse with the provided fuse puller or a pair of pliers and replace it with a fuse of the same amperage. Making sure the fuses are regularly checked and maintained is important for keeping the car’s electrical systems working well, which leads to a smooth and trouble-free driving experience.
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Checking and replacing fuses
If any of the electrical components do not operate, a fuse may have blown. If this happens, check and replace the fuses as necessary.
Checking and replacing fuses
- Turn the power switch off.
- Open the Fuse box cover.
- Engine compartment: type A fuse box
Push the tab in and lift the lid off.
- Engine compartment: type B fuse box
Push the tab in and lift the lid off.
- Driver’s side instrument panel
Push the tab in and remove the lid. Make sure to push the tab in during removal or installation.
- Engine compartment: type A fuse box
- Remove the fuse with the pullout tool.
Only type A fuses can be removed using the pullout tool.
- Check if the fuse is blown.
Type A and B:
Replace the blown fuse with a new fuse of an appropriate amperage rating. The amperage rating can be found on the fuse box lid.
Type C:
Contact your Lexus dealer.
Type A
- Normal fuse
- Blown fuse
Type B
- Normal fuse
- Blown fuse
Type C
- Normal fuse
- Blown fuse
After a fuse is replaced
- When installing the lid, make sure that the tab is installed securely.
- If the lights do not turn on even after the fuse has been replaced, a bulb may need replacement. (P.351)
- If the replaced fuse blows again, have the vehicle inspected by your Lexus dealer.
If there is an overload in a circuit
The fuses are designed to blow, protecting the wiring harness from damage.
When replacing light bulbs
Lexus recommends that you use genuine Lexus products designed for this vehicle. Because certain bulbs are connected to circuits designed to prevent overload, non-genuine parts or parts not designed for this vehicle may be unusable.
WARNING
To prevent system breakdowns and vehicle fire
Observe the following precautions. Failure to do so may cause damage to the vehicle, and possibly a fire or injury.
- Never use a fuse of a higher amperage rating than that indicated, or use any other object in place of a fuse.
- Always use a genuine Lexus fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix. - Do not modify the fuses or fuse boxes.
NOTICE
Before replacing fuses
Have the cause of electrical overload determined and repaired by your Lexus dealer as soon as possible.
FAQs
Fuses in the 2020 Lexus ES300H serve to protect various electrical components by breaking the circuit in the event of an electrical overload or short circuit.
The 2020 Lexus ES300H typically has two fuse boxes—one in the engine compartment and another inside the cabin.
The engine compartment fuse box is usually located near the battery.
The interior fuse box is usually located beneath the dashboard on the driver’s side. You may need to open the driver’s side door and remove a cover to access it.
A fuse puller or a pair of needle-nose pliers can be used to remove and replace fuses. It’s also helpful to have a flashlight for better visibility.
A blown fuse often has a visibly broken wire or a discolored appearance. Use the owner’s manual or fuse box cover to identify which fuse corresponds to the malfunctioning component.
The vehicle may use mini blade fuses or other types.
Yes, you can visually inspect fuses without removing them. However, it’s more accurate to remove and check each fuse individually.
Set the multimeter to the continuity or resistance setting. Touch the probes to both ends of the fuse. If the multimeter shows continuity, the fuse is functional.
Replace the blown fuse with a new one of the same amperage rating. Use the spare fuses provided in the fuse box.
Common issues include blown fuses due to electrical faults, short circuits, or overloading. Regularly check and replace fuses to avoid electrical problems.
No, it’s not recommended. Always replace a blown fuse with one of the same amperage rating to prevent damage to the electrical system.
Avoid overloading the electrical system, and address any electrical issues promptly to prevent damage to fuses.
Check with the manufacturer or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls related to the vehicle’s fuses.
If you’re unable to identify or fix the issue with the fuses, it’s advisable to consult a professional mechanic or contact the Lexus dealership for assistance.
Useful Link:
View Full PDF: 2020 Lexus ES300H Owner’s Manual | Auto User Guide
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