2020 International LT Fuse Box Diagram & Amperage
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Quick answer
The 2020 International LT has two main fuse box locations:
- Under-Hood Fuse Box: Located in the engine compartment, near the battery.
- Dash Fuse Box: Located behind a kick-panel in the dashboard, on the passenger side.
Under-Hood Fuse Box
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F1 | 60A | Yellow | Ignition Switch B+ Feed |
| F2 | 40A | Green | Cab Power |
| F3 | 30A | Pink | Trailer ABS |
| F4 | 20A | Yellow | ECM/PCM |
| F5 | 15A | Blue | Fuel Pump |
| F6 | 20A | Yellow | High Beam Headlights |
| F7 | 20A | Yellow | Low Beam Headlights |
| F8 | 15A | Blue | Park/Tail Lights |
| F9 | 10A | Red | Brake Lights |
| F10 | 30A | Pink | Blower Motor |
| F11 | 15A | Blue | A/C Clutch |
| F12 | 40A | Green | ABS Module |
| F13 | 60A | Yellow | Airbag Module |
| F14 | 30A | Pink | Trailer Brake Controller |
| R1 | - | - | Starter Relay |
| R2 | - | - | Ignition Relay |
| R3 | - | - | Fuel Pump Relay |
Dash Fuse Box
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F1 | 15A | Blue | Radio/Infotainment System |
| F2 | 20A | Yellow | Cigar Lighter / 12V Power Outlet |
| F3 | 10A | Red | Instrument Cluster |
| F4 | 15A | Blue | Dome Lights |
| F5 | 10A | Red | Turn Signals |
| F6 | 20A | Yellow | Power Windows |
| F7 | 15A | Blue | Heated Mirrors |
| F8 | 10A | Red | Diagnostic Port |
| F9 | 5A | Tan | Spare |
| F10 | 10A | Red | Spare |
| R1 | - | - | Blower Motor Relay |
| R2 | - | - | Accessory Relay |
How to test a fuse
Testing a fuse is a simple process. You will need a fuse tester or a multimeter. To test a fuse, simply remove it from the fuse box and visually inspect it. If the metal strip inside the fuse is broken, the fuse is blown and needs to be replaced. If you are unsure, you can use a fuse tester or a multimeter to check for continuity. If the fuse is good, the tester will light up or the multimeter will show a reading of 0 ohms. If the fuse is blown, the tester will not light up or the multimeter will show an open circuit.
Common blown fuses on this vehicle
- Cigar Lighter / 12V Power Outlet Fuse: This is one of the most common blown fuses on any vehicle. It is usually caused by a faulty phone charger or other device that is plugged into the outlet.
- Trailer Brake Controller Fuse: This fuse can blow if there is a short in the trailer wiring. Be sure to check the trailer wiring for any damage before replacing the fuse.
- Fuel Pump Fuse: This fuse can blow if the fuel pump is failing. If you replace the fuse and it blows again, you will need to have the fuel pump replaced.
It is important to note that this is not an exhaustive list of all the fuses in your 2020 International LT. There may be other fuses located in different locations depending on the trim level and options of your vehicle. Always consult the fuse box lid or your owner's manual for a complete list of all the fuses and their locations.
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Before you pull a fuse on the 2020 International LT
- Use the label printed on the panel cover or the owner's manual for your exact build. Layouts change with options, model year and build date, so a chart for another truck can be wrong.
- Replace a blown fuse only with the same amp rating. A larger fuse can let wiring overheat.
- A fuse that blows again right away means a short or failing component downstream. Find the cause before replacing it again.
- A good fuse doesn't prove the circuit works — relays, grounds and connectors fail too.
- Many heavy trucks have more than one power distribution point (cab, under-hood or near the batteries), and some circuits use circuit breakers instead of fuses. Some systems have 24-volt starting circuits; confirm the voltage before testing.
- Disconnect the battery before working near high-current fuses or cables.
Learn more: How fuses, relays and truck electrical systems work · Find mobile truck repair
More specs for the 2020 International LT
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2020 International LT Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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