2022 International MV Fuse Box Diagram & Amperages

As an ASE-certified master technician, I know that dealing with electrical issues on medium-duty commercial trucks can be intimidating. If your 2022 International MV Series has suddenly lost power to its interior accessories, exterior lighting, or engine management systems, checking the fuses is the first step in diagnosing the problem. Because the MV Series is heavily customizable for various upfitters and applications, your exact fuse layout may vary. However, the standard chassis configuration remains fairly consistent.

Below is a comprehensive guide to the fuse box locations, amperage ratings, and common circuits for the 2022 International MV. Always verify the printed legend on the inside of your vehicle's fuse box lid, as upfitter modifications and optional equipment can alter the layout.

Quick Answer: Fuse Box Locations

On the 2022 International MV, you will generally find the electrical distribution centers in two primary locations:

1. Under-Hood Power Distribution Module (PDM): Located in the engine compartment, typically mounted on the driver's side firewall or fender wall. This handles high-amperage components, engine management, and exterior lighting.
2. Cab / Interior Fuse Panel (Body Controller): Located inside the cabin, usually behind a removable access panel on the passenger side of the dashboard or in the kick panel area. This manages interior accessories, the radio, blower motor, and diagnostic ports.

Under-Hood Power Distribution Module (PDM)

The under-hood PDM is the nerve center for your MV's powertrain and heavy-duty electrical circuits. This box contains both standard blade fuses (ATO/ATC or Mini) and larger cartridge fuses (J-Case), alongside heavy-duty relays.

Note: Depending on whether your truck has air brakes or hydraulic brakes, and whether it's equipped with the Cummins B6.7/L9 or Navistar engine, certain ECM and ABS fuses may be routed slightly differently. Always check the PDM cover.

Cab / Interior Fuse Panel

The interior fuse box controls the creature comforts, displays, and internal modules of your MV Series truck. If your 12V outlet dies or your gauges go blank, check here first.

How to Test a Fuse

Visually inspecting a fuse isn't always enough. Sometimes a micro-fracture in the fuse element can look perfectly intact but still block electrical flow. As a master technician, I recommend the following testing procedure:

1. Safety First: Ensure the ignition is turned off and the truck's parking brake is set.
2. Locate the Fuse: Use the diagrams above and your fuse box lid to pinpoint the suspect fuse. Use a fuse puller or needle-nose pliers to carefully remove it.
3. Visual Inspection: Hold the fuse up to the light. Look at the U-shaped or S-shaped wire inside. If it is broken or there is a black burn mark, the fuse is blown.
4. Multimeter Test (The Pro Method): Set your digital multimeter to the continuity setting (the one that beeps) or to the lowest Ohms (resistance) setting. Touch a probe to each of the metal blades on the fuse. If the meter beeps or reads close to 0.00 Ohms, the fuse is good. If it reads "OL" (Open Loop) or infinity, the fuse is blown and must be replaced.
5. Use Exact Replacements: Never replace a blown fuse with one of a higher amperage rating. Putting a 30-amp fuse into a 10-amp slot is a guaranteed way to cause a wiring harness fire.

Common Blown Fuses on This Vehicle

The 2022 International MV is a hard-working truck, and it sees a lot of heavy usage. Here are the most common electrical issues we see in the shop, and which fuses to check first:

• Cigar Lighter / 12V Outlet (Cab F16 - 20A): This is by far the most commonly blown fuse on any commercial truck. Drivers often plug in power inverters, high-draw phone chargers, or coolers. If your accessories stop charging, check this 20A yellow fuse first.
• Trailer Brake / Towing Circuits (Under-Hood F8 - 20A or F10 - 15A): Because trailer wiring is often exposed to the elements, salt, and rough roads, it frequently shorts out. If your trailer marker lights or trailer brakes suddenly stop working, check the PDM fuses before suspecting the Body Controller.
• HVAC Blower Motor (Cab F18 - 30A): The MV's cab blower motor works overtime. If the fan suddenly quits on all speeds, check the 30A fuse and the associated Blower Motor Relay.
• Fuel Pump (Under-Hood F2 - 20A): If the truck cranks but refuses to start, the fuel lift pump circuit is a prime suspect. Check this fuse, and ensure you hear the pump prime when you turn the key to the "ON" position.

When a fuse blows repeatedly, do not just keep replacing it. A recurring blown fuse indicates a direct short to ground or a failing component drawing too much amperage.

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