2020 Nissan Frontier – Fuse Box Diagram & Amperage

Quick Answer

The 2020 Nissan Frontier has fuse boxes located in the following areas:

• Under the Hood: Main fuse box for critical engine and accessory circuits.
• Passenger Compartment: Located behind the kick panel on the passenger side, protecting interior electrical components.

Under-Hood Fuse Box

The under-hood fuse box contains high-amperage fuses and relays for major systems like the engine control module, fuel pump, and headlights. Always consult the fuse diagram on the fuse box lid for the most accurate information as configurations can vary slightly by trim level.

Relays in Under-Hood Fuse Box:

• Fuel Pump Relay: Controls power to the fuel pump.
• Starter Relay: Engages the starter motor.
• IGN Relay: Provides power for ignition circuits.
• Headlight Relays: Control high and low beam headlights.
• Blower Motor Relay: Controls the Blower Fan speed.
• A/C Clutch Relay: Activates the air conditioning compressor clutch.

Passenger Compartment Fuse Box (Behind Passenger Kick Panel)

This fuse box primarily handles interior electrical accessories and convenience features. Always verify with your vehicle's fuse box cover for precise details, as some trims may have minor variations.

How to Test a Fuse

Testing a fuse is a simple process that can save you time and money. Here's how you can do it:

1. Safety First: Ensure the vehicle is off and the key is removed from the ignition before attempting to test or replace any fuses.
2. Locate the Fuse Box: Refer to the "Quick Answer" section for the fuse box locations on your 2020 Nissan Frontier. You may need a small flathead screwdriver or a trim removal tool to open the fuse box cover.
3. Identify the Suspect Fuse: Consult the fuse diagram on the inside of the fuse box cover or your owner's manual to identify the fuse associated with the faulty component.
4. Visual Inspection: Many fuses have a visible wire inside. If this wire is broken or melted, the fuse is blown and needs to be replaced.
5. Use a Fuse Tester (Recommended): For a more definitive test, use a fuse tester. These inexpensive tools typically have a light that illuminates if the fuse is good. Simply touch the probes of the tester to the two small metal test points on the top of the fuse (even without removing it).
6. Use a Multimeter: Set your multimeter to the continuity or ohms setting. Remove the fuse from its slot and touch one probe to each metal blade of the fuse. If the multimeter beeps or shows a reading close to zero ohms, the fuse is good. If it shows an open circuit (infinity or OL), the fuse is blown.
7. Replace Blown Fuses: Always replace a blown fuse with a new one of the exact same amperage rating and type. Using a fuse with a higher amperage can lead to serious electrical damage or fire.

Common Blown Fuses on This Vehicle

While fuses can blow for various reasons, some circuits are more prone to issues due to frequent use or potential overloading. On the 2020 Nissan Frontier, here are some commonly blown fuses and what to check first:

• Cigar Lighter / 12V Power Outlet Fuse: This is a very common fuse to blow, especially if you frequently use high-power accessories like phone chargers, portable air compressors, or car vacuums. What to check first: Disconnect all devices from the outlets and try a new fuse. If it blows again, there might be a short in the wiring or the outlet itself.
• Radio/Infotainment Fuse: If your radio suddenly goes dead, this fuse is often the culprit. What to check first: Make sure no aftermarket accessories (like custom lighting or sound systems) are drawing excessive power. A short within the head unit itself is less common but possible.
• Blower Motor Fuse: If your HVAC fan stops working, the blower motor fuse might have blown due to the motor drawing too much current, indicating a failing motor or an obstruction. What to check first: Inspect the cabin air filter for clogs and listen for any unusual noises from the blower motor. If the new fuse blows immediately, the blower motor likely needs replacement.
• Headlight Fuses: If one or both headlights stop working, check the corresponding headlight fuses. What to check first: Before replacing the fuse, check the headlight bulb itself. A blown fuse often indicates a short in the wiring or a faulty bulb drawing too much current.
• Brake Light Fuse: If your brake lights are out, this fuse is a prime suspect. What to check first: Check the brake light bulbs. Also, ensure the brake pedal switch is functioning correctly, as a faulty switch can sometimes cause issues.

Remember, if a fuse blows repeatedly, there