2020 Nissan Altima: Fuse Box Diagram & Amperage

Quick Answer

The 2020 Nissan Altima has three main fuse box locations:

• Under-hood fuse box (IPDM E/R): Located in the engine compartment, near the battery.
• Driver's side interior fuse box: Located under the dashboard, to the left of the steering column.
• Passenger's side interior fuse box: Located under the dashboard, on the right side of the passenger footwell.

Under-hood Fuse Box (IPDM E/R)

This fuse box contains the higher amperage fuses and relays for major systems. You'll find it in a black plastic box near the battery on the driver's side of the engine bay. The layout can vary slightly based on your Altima's trim level (e.g., наличие AWD, turbo engine).

Relays:

• Ignition Relay: Controls power to the ignition system.
• Fuel Pump Relay: Activates the fuel pump.
• Starter Relay: Engages the starter motor.
• A/C Relay: Engages the A/C compressor clutch.
• Headlight Relay: Controls power to the headlights.

Driver's Side Interior Fuse Box

This fuse box is located under the dashboard on the driver's side, often behind a small pull-out panel or requiring you to look up from the floor mat area. It handles most of the interior and cabin accessory circuits.

Passenger's Side Interior Fuse Box

This smaller, secondary fuse panel is located in the passenger-side footwell, often behind a kick panel or cover on the right side.

Important Note: Fuse numbers and circuits can vary based on your Altima's specific trim and options. Always consult the diagram printed on the inside of the fuse box cover to verify the correct fuse for the circuit you are checking.

How to Test a Fuse

Testing a fuse is a simple process. You can often tell if a fuse is blown just by looking at it.

1. Turn the vehicle off.
2. Locate and remove the suspect fuse. Use the fuse puller tool often found in the under-hood fuse box, or a pair of needle-nose pliers.
3. Inspect the metal link inside. A good fuse will have an unbroken, continuous metal strip. A blown fuse will have a gap or a dark, burnt-looking break in the strip.
4. Use a multimeter for certainty. For a more definitive test, set a multimeter to the continuity setting (it often has a sound symbol). Touch the probes to each of the two metal prongs on top of the fuse. If the multimeter beeps, the fuse is good. If it remains silent, the fuse is blown and has no continuity.
5. Replace with the correct amperage. If you find a blown fuse, replace it with a new one of the exact same amperage rating. Using a higher-rated fuse can cause a fire hazard by allowing too much current through the circuit.

Common Blown Fuses on This Vehicle

• Power Outlet (Cigar Lighter) Fuse (#2, 15A): This is one of the most common fuses to blow. It's often caused by a faulty phone charger, a coin falling into the outlet, or a device that draws too much power. Before replacing the fuse, inspect the 12V outlet for any foreign objects or debris.
• Audio/Infotainment Fuse (#3, 10A): If your radio or center display suddenly goes black, this fuse is the first thing to check. It can sometimes blow without a clear cause, but aftermarket audio equipment can also be a culprit. If it blows repeatedly, you may have a wiring short behind the head unit.
• Blower Motor Fuse (#43, 30A): If your HVAC fan stops working on all speeds, check this high-amperage fuse in the under-hood box. If the fuse is blown, it could be a sign that the blower motor itself is failing and drawing too much current. If you replace the fuse and it blows again when you turn the fan on high, the motor likely needs to be replaced.

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