2019 Nissan Titan Fuse Box Diagram & Amperage Guide

As an ASE-certified master technician, one of the most frequent electrical issues I see in the bay involves a simple blown fuse or a faulty relay. The 2019 Nissan Titan is a rugged and reliable full-size truck, but like any modern vehicle, it is packed with complex electronics, modules, and accessories. When your infotainment screen goes black, your headlights fail, or your trailer brakes stop working, the very first place you should check is the fuse box.

This comprehensive guide covers the fuse box locations, diagrams, and amperage ratings for the 2019 Nissan Titan (both standard and XD models).

Note: Always verify the exact fuse configuration using the printed legend inside your specific vehicle’s fuse box lid, as layouts can vary slightly based on engine options (e.g., 5.6L V8 gas vs. 5.0L Cummins diesel) and trim levels.

Quick answer: Where are the fuse boxes on a 2019 Nissan Titan?

The 2019 Nissan Titan features two primary areas where fuses and relays are located:

1. Passenger Compartment (Cabin) Fuse Box: Located inside the cab on the driver’s side. You will find it behind a removable plastic cover on the lower instrument panel (kick panel area) near the steering column and parking brake pedal.
2. Engine Compartment Fuse Boxes (IPDM E/R & Main Fuse Block): Located under the hood on the passenger side, right next to the battery. Nissan uses an Intelligent Power Distribution Module Engine Room (IPDM E/R) along with standard fuse blocks to manage high-draw circuits.

There is no trunk or cargo fuse box on the Titan, though some bed-power inverter relays may be tucked near the rear frame depending on your trim.

Passenger Compartment Fuse Box Diagram

This fuse panel primarily protects interior accessories, cabin modules, lighting, and infotainment systems. To access it, simply pull off the plastic cover on the lower left side of the dashboard.

Relays in this area typically include the accessory relay and the ignition relay, integrated into the BCM network or mounted just above the fuse block.

Engine Compartment Fuse Boxes (Under-Hood)

The under-hood fuse layout consists of a main fuse block (often containing fusible links for the alternator and battery) and the IPDM E/R, which holds standard blade fuses and heavy-duty relays.

Under-Hood Relays: In addition to the fuses above, the under-hood box houses critical relays. Common relays found here include the Starter Relay, Fuel Pump Relay, A/C Clutch Relay, Cooling Fan Relays, and the ECM/Ignition Relay. If a component like the A/C or fuel pump isn't working but the fuse is good, the relay is the next suspect.

How to Test a Fuse

As an ASE master technician, I always recommend testing fuses rather than just relying on a visual inspection. Sometimes a fuse can blow but look perfectly intact to the naked eye. Here is the proper way to test them:

1. Use a Test Light: Ground the clamp of your 12V test light to a solid bare metal component. Turn the vehicle ignition to the "ON" position (do not start the engine). Touch the probe to the tiny metal testing points on top of the fuse. If the light illuminates on both sides, the fuse is good. If it only lights up on one side, the fuse is blown.
2. Use a Digital Multimeter (DMM): Set your DMM to the continuity setting (the one that beeps) or the lowest Ohms (resistance) setting. Touch the probes to the test pins on top of the fuse. A continuous beep or a reading of near 0.0 ohms means the fuse is good. An "OL" (Open Loop) or infinite reading means the fuse has blown.
3. Always Replace with the Same Amperage: Never replace a 10A fuse with a 20A fuse. Doing so allows too much current to flow through the wires, which can melt the wiring harness or even cause a vehicle fire.

Common Blown Fuses on the 2019 Nissan Titan

Based on what rolls into the service bay, here are the most common electrical circuits that blow fuses on the 2019 Nissan Titan:

• 12V Power Outlets / Cigar Lighter (Fuses 4 & 5 - Cabin): This is the number one most common blown fuse. Usually, it happens because a driver plugs in a faulty phone charger, a high-draw tire inflator, or drops a coin into the open socket. Always check the socket for debris before replacing the fuse.
• Trailer Tow Fuses (Fuses 30 & 31 - Under-Hood): The Titan is a workhorse, often used for towing. Old trailers with chafed wiring or corroded 7-pin connectors will frequently short out the truck’s trailer brake or trailer lighting fuses. If you lose trailer lights, check the truck's under-hood tow fuses and thoroughly inspect your trailer’s wiring harness.
• A/C Compressor Clutch (Fuse 29 - Under-Hood): If your air conditioning suddenly stops blowing cold, verify this fuse and the corresponding A/C relay. Sometimes a failing compressor clutch coil will draw excessive amperage and pop this 10A fuse.

Remember, a blown fuse is usually a symptom, not the root cause. If you replace a fuse and it immediately blows again, you have a dead short in the circuit that needs professional diagnosis.

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