Replacing Fuses: 2021 Toyota Prius Prime Fuse Diagram and Realy Guide
Keeping the electrical system in good shape is important for the safety of any car. Making sure that the fuses in your 2021 Toyota Prius Prime are in good shape is very important to avoid power problems. Fuses are safety features that keep different electrical circuits from getting damaged by overloads or short circuits. All Prius Prime owners need to know how to change the fuses and switches. This guide will give you a full picture of the fuse diagram and where the relays are located. It will also show you how to safely replace the fuses in your Prius Prime, so you can drive with peace of mind and smooth performance.
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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.
- Turn the power switch off.
- Open the fuse box cover.
- Engine compartment type A fuse box
While pushing the 2 claws, lift the cover. When closing the cover, make sure to attach the 2 claws. - Engine compartment type B fuse box
While pushing the 3 claws, lift the cover. When closing the cover, make sure to attach the 3 claws. - Left side instrument panel
Remove the lid. Make sure to press the claw during removal or installation.
- Engine compartment type A fuse box
- Remove the fuse.
Only type A fuse can be removed using the pullout tool.
- Check if the fuse is blown.
- Normal fuse
- Blown fuse
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 A
Type B
Type C
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After a fuse is replaced
- If the lights do not turn on even after the fuse has been replaced, a bulb may need replacement.
- If the replaced fuse blows again, have the vehicle inspected by your Toyota 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
Toyota recommends that you use genuine Toyota 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 Toyota 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 Toyota dealer as soon as possible.
How to Replace the Fuse of the 2021 Toyota Prius Prime
Replacing the fuse in a 2021 Toyota Prius Prime is a relatively straightforward process. Here are the general steps you can follow:
Materials:
- The new fuse of the correct amperage.
- Fuse puller or needle-nose pliers.
Instructions:
- Locate the Fuse Box: The fuse box in the Toyota Prius Prime is usually located in the engine bay or under the dashboard on the driver’s side.
- Turn off the Engine: Before you begin working on the fuse box, make sure the engine is turned off and the key is removed from the ignition.
- Identify the Blown Fuse: Use the fuse diagram located on the fuse box cover to identify the fuse that needs to be replaced. You can usually tell if a fuse is blown by looking at the metal strip inside. If it’s broken or burnt, the fuse needs to be replaced.
- Remove the Blown Fuse: Using a fuse puller tool or a pair of needle-nose pliers, carefully pull the blown fuse out of its slot. Be gentle to avoid damaging the fuse box or surrounding components.
- Insert the New Fuse: Take a new fuse of the same amperage rating and carefully insert it into the empty slot in the fuse box. Make sure it is seated securely.
- Test the Circuit: Once the new fuse is in place, turn the ignition to the accessory position (do not start the engine) and test the circuit to ensure the new fuse is working properly. If the fuse blows again immediately, there may be a larger electrical issue that needs to be addressed by a professional.
- Replace the Fuse Box Cover: Once you’ve confirmed the new fuse is working correctly, replace the fuse box cover and ensure it is securely in place.
- Dispose of the Old Fuse: Safely dispose of the old fuse according to local regulations. Do not discard it in the regular trash.
Tips:
Always use a fuse with the correct amperage rating to prevent electrical issues or damage to the vehicle.
FAQs
The fuse diagram for the 2021 Toyota Prius Prime helps identify the location and function of each fuse in the vehicle.
The fuse box in the 2021 Toyota Prius Prime is typically located in the engine compartment or inside the cabin.
Accessing the fuse box in the 2021 Toyota Prius Prime typically involves removing a cover or panel located either in the engine compartment or inside the cabin.
Relays in the fuse system of the 2021 Toyota Prius Prime help control electrical circuits, allowing them to handle higher currents.
Common reasons for needing to replace fuses in the 2021 Toyota Prius Prime include electrical issues, blown fuses due to overloads, or component failures.
When replacing fuses in the 2021 Toyota Prius Prime, it is important to disconnect the battery, use the correct fuse rating, and handle fuses carefully to avoid electrical hazards.
The size and amperage rating of fuses used in a 2021 Toyota Prius Prime may vary depending on the specific electrical component or circuit.
When the current passing through a fuse exceeds its rated capacity, the fuse element inside melts, breaking the circuit and stopping the flow of electricity.
Accessing the fuse box usually involves opening a cover or panel, which may require the use of a screwdriver or simply pulling off a cover.
You may need a fuse puller tool or a pair of needle-nose pliers to remove a blown fuse safely.
A blown fuse will typically have a broken or melted fuse element visible through the transparent casing, or the fuse may appear discolored or blackened.
No, it’s essential to replace a fuse with one of the same amperage rating to ensure proper protection and prevent electrical damage or fires.
Use a fuse puller tool or a pair of needle-nose pliers to grip the fuse and gently pull it straight out of its socket.
Align the new fuse with the corresponding socket in the fuse box and firmly press it into place until it is fully seated.
Useful Links
View full PDF: 2022 Toyota Prius User Guide | Auto User Guide
2024 Prius Prime Review, Specs, Price, And Mileage (Brochure)