Check the power distribution unit under the hood first, as it contains high-current links for traction system support, cooling modules, and main control electronics. This compartment sits near the battery and includes clearly numbered slots with labeled circuits on the cover.
Use the exact amperage rating shown on each component, typically ranging from 10A to 50A, since incorrect replacements can damage sensitive electric drive systems. Inspect the metal strip inside each element; a visible break or discoloration indicates failure.
The interior panel, usually located near the driver-side lower dash, handles cabin electronics such as infotainment, lighting, and climate control. Remove the trim cover carefully to expose the panel and read the printed layout for circuit identification.
Relays in the engine compartment manage switching for systems like battery cooling and power control modules. If a system stops responding, swap identical relay units within the same panel to confirm whether the issue is relay-related without installing new parts.
Disconnect the negative terminal before working on any electrical distribution point to prevent short circuits and protect onboard control units from voltage spikes.
Nissan Leaf 2019 Fuse Box Diagram with Fuse Locations Relay Layout and Circuits
Read the cover layout inside the engine compartment power unit before touching any component, since each slot is mapped to a specific circuit such as inverter cooling, brake control, or DC-DC converter. High-current links, often rated 30A to 50A, are grouped along one side and handle load-intensive systems.
Identify each slot by number and amperage marking rather than position alone, as similar layouts can vary between trims. For example, mid-range slots (15A–25A) typically supply control modules, while larger ratings support heating elements and cooling fans.
Engine compartment layout details
Main relays are positioned near the upper section of the power center and control switching for traction-related electronics. These include relays for battery cooling circuits and ignition-ready systems. Swapping identical relay units within this panel helps confirm faults without additional tools.
The interior panel supports low-current circuits tied to cabin systems, including infotainment, instrument cluster, and climate controls. Ratings here usually range from 10A to 20A, and each slot is labeled on the rear side of the panel cover.
Interior circuit mapping
Match symptoms to circuit assignments by checking which systems stopped working simultaneously. If multiple cabin features fail, inspect shared power lines within the interior panel rather than individual components.
Inspect terminals for heat damage, loose fit, or oxidation before reinstalling any element, since poor contact can cause intermittent faults without fully breaking the circuit.
Where Fuse Boxes Are Located in Nissan Leaf 2019 and How to Access Them
Open the hood and locate the main power distribution unit near the 12V battery, positioned on the right side of the engine bay. Release the plastic locking tabs on the cover and lift it straight up to reveal the internal layout with numbered slots and relays.
Use steady pressure when removing the cover, as the clips can be tight and uneven force may crack the plastic housing. Once open, check the underside of the lid for circuit assignments and amperage ratings.
Access the interior panel by removing the lower dashboard trim on the driver side. This section is mounted behind a small plastic cover; pull it outward from the edge to expose the internal panel. It contains low-current links for cabin electronics such as display systems and interior lighting.
Ensure the vehicle is powered off and the negative terminal is disconnected before opening any electrical distribution unit to prevent short circuits or system errors.
Keep a small puller tool or needle-nose pliers nearby for safe removal, and always reinstall covers securely to protect internal components from dust and moisture.