2019 International MV Fuse Box Diagram & Amperage

Quick Answer

The 2019 International MV typically features three main fuse box locations: under the hood (engine compartment), inside the cabin (driver's side kick panel), and often a third dedicated fuse panel for body builders or additional accessories, sometimes located in the cab or an external battery box depending on the specific upfit.

Under-Hood Fuse Box

This fuse box, generally located on the driver's side of the engine compartment near the battery, houses fuses and relays for critical engine functions, lighting, and other high-current systems. Always refer to the legend on the inside of the fuse box cover for the exact layout for your specific truck configuration, as variations can occur.

Relay Locations (Under-Hood):

• R1: Starter Relay
• R2: Fuel Pump Relay
• R3: Headlight Low Beam Relay
• R4: Headlight High Beam Relay
• R5: A/C Clutch Relay
• R6: Blower Motor Relay
• R7: ECM Main Relay

Cabin Fuse Box (Driver's Side Kick Panel)

This fuse box, typically found behind a removable panel on the driver's side kick panel or dashboard side, contains fuses for interior accessories, convenience features, and some communication systems. Again, verify with your truck's specific fuse box legend.

How to Test a Fuse

Testing a fuse is a straightforward process:

1. Safety First: Always turn off the ignition and any affected circuits before testing or replacing fuses.
2. Locate the Fuse: Refer to your truck's fuse box diagram (either in your owner's manual or on the fuse box cover) to find the suspected fuse.
3. Visual Inspection: Many modern fuses have a clear plastic body. Look for a broken wire or "filament" inside. If it's broken, the fuse is blown. If it's cloudy or discolored, it might also be a sign of a bad fuse.
4. Use a Multimeter or Test Light:
   • With a Test Light: Connect the alligator clip of the test light to a good ground point. Touch the tip of the test light to the small metal test points on the top of the fuse (there are usually two). If the fuse is good, the test light will illuminate on both sides. If it only illuminates on one side or not at all, the fuse is blown.
   • With a Multimeter: Set your multimeter to the ohms (Ω) setting (continuity test). Remove the suspected fuse from its slot. Place the multimeter probes on both metal tabs of the fuse. A good fuse will show very low resistance (close to 0 ohms) or beep if your multimeter has a continuity function. An open circuit (blown fuse) will show an "OL" (over limit) or infinite resistance reading.
5. Replace (if blown): If a fuse is found to be blown, replace it with a new fuse of the exact same amperage and type. Never use a fuse with a higher amperage rating, as this can lead to serious electrical damage or fire.

Common Blown Fuses on this Vehicle

On a commercial vehicle like the 2019 International MV, certain fuses might blow more frequently due to the demands placed on the electrical system or common accessory usage. When a fuse blows, it's crucial to understand that the fuse is a symptom, not the cause. It blew to protect the circuit from an overcurrent situation.

• Cigar Lighter / 12V Outlets (Fuse C2, C11): These are very common culprits, especially in commercial trucks where drivers often plug in high-draw accessories like phone chargers, portable refrigerators, or heated blankets. If this fuse blows, first unplug all accessories from the outlet and try replacing the fuse.
• Trailer Brake Controller (Fuse F15 - Under-Hood): Issues with trailer wiring, short circuits in the trailer itself, or an overloaded trailer electrical system can cause this fuse to blow. If this fuse blows, inspect the trailer wiring and connections for any damage or corrosion.
• Headlights (Fuses F6, F7, F8, F9 - Under-Hood): While less common, a short in a headlight bulb or wiring can cause these to blow. If only one headlight is out, first check the bulb. If both are out, check the respective fuses.
• Radio / Infotainment System (Fuse C1 - Cabin): Aftermarket radio installations or issues within the radio unit itself can sometimes lead to this fuse blowing. If your radio suddenly goes dark, check this fuse.
• Blower Motor (Fuse F13 - Under-Hood): A failing blower motor (drawing too much current), a clogged cabin air filter causing the motor to work harder, or a short in the blower motor resistor can cause this fuse to blow. If your HVAC fan stops working, this is a good place to start.

Always remember, if a fuse blows repeatedly, there's an underlying electrical issue that needs to be diagnosed and repaired by a qualified technician to prevent further damage.

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