Check the driver side lower dashboard area first, where the main protection module is mounted behind a removable plastic cover; access requires pulling the panel outward without tools to reveal labeled slots and relays.
Use the layout chart printed on the cover to match each position with systems such as ignition, infotainment, lighting, and climate control, noting amperage values that usually range from 5A to 40A depending on circuit load.
For engine-related circuits, open the hood and locate the secondary distribution unit near the battery on the left side; this enclosure contains high-current links for starter, cooling fans, and charging system, protected by larger rated components.
Inspect each element visually for breaks in the metal strip and check terminals for corrosion or looseness; always replace with identical rating and type to prevent wiring overheating or repeated electrical faults.
2020 Nissan Maxima Fuse Box Diagram with Relay Locations and Circuit Details
Match each slot number on the interior electrical panel with the printed legend before removing any component, as incorrect placement can disable ignition, infotainment, or safety systems.
The cabin unit contains low to medium amperage elements and control switches grouped by function, typically arranged in rows with clear numbering for quick identification.
- ACC – accessory power for infotainment and sockets
- IGN – ignition system supply
- AUDIO – head unit and amplifier
- HVAC – climate control blower and controls
- SRS – airbag system protection
- WIPER – windshield motor circuit
Under the hood, locate the engine compartment power distribution center near the battery; this unit includes larger capacity inserts and multiple relays controlling high-load systems.
Relays in this area manage operations such as cooling fans, starter motor engagement, and fuel pump activation, switching current without routing full load through the cabin controls.
- Cooling fan relay – activates radiator fans
- Starter relay – controls cranking circuit
- Fuel pump relay – powers fuel delivery system
- Headlamp relay – manages exterior lighting
Inspect each insert by checking the internal metal strip and ensure terminals are clean and firmly seated; heat damage or oxidation can cause intermittent faults even if the strip appears intact.
Always install replacements with identical amperage ratings, commonly ranging from 5A for control circuits to 50A or higher for engine-related loads, maintaining proper circuit protection and preventing wiring damage.
Exact location of interior fuse panel and how to access it under dashboard
Open the driver door and look at the lower left dashboard trim near the steering column, where the interior electrical unit is hidden behind a rectangular plastic cover.
Grip the edge of the cover and pull it outward; it is secured by clips rather than screws, allowing removal without tools while exposing the full array of circuits and relays.
The module is mounted slightly angled upward, making it easier to read slot numbers while seated in the driver position.
Use a flashlight to clearly see the labeling, as the panel sits deep within the dash structure and ambient light is limited.
Behind the cover, a printed legend shows circuit names and amperage ratings, helping match each slot with systems such as lighting, ignition, and cabin electronics.
Keep the cover nearby during service, since it often includes a small plastic puller designed to remove inserts without damaging terminals.
Ensure the ignition is switched off before touching any component to avoid short circuits or accidental activation of electrical systems.
After inspection or replacement, press the cover back until all clips lock into place, confirming a secure fit to prevent rattling or exposure to dust.