2022 Volvo VNL Fuse Box Diagram & Amperage

Quick Answer

The 2022 Volvo VNL typically features three main fuse box locations:

• Under-hood: Located on the driver's side, near the firewall or battery box. This box primarily handles high-current circuits and powertrain components.
• Dash Kick-Panel (Driver's Side): Positioned behind a removable panel on the driver's side kick panel. This box manages interior electrical systems and accessory circuits.
• Rear Cab/Trunk/Cargo Area: Often found in the sleeping compartment, behind a panel on the rear wall or under the bunk. This box frequently contains fuses for sleeper amenities, trailer connections, and rear lighting.

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Under-Hood Fuse Box

The under-hood fuse box on your 2022 Volvo VNL is primarily responsible for critical powertrain functions, high-current components, and some heavy-duty accessories. Always consult the diagram on the fuse box lid for the most accurate information for your specific trim level, as configurations can vary.

Fuse #	Amperage	Color	Circuit / Component Protected
F1	20A	Yellow	ECM (Engine Control Module) Main Power
F2	15A	Blue	Fuel Pump (Electric)
F3	30A	Green	Starter Relay Control
F4	25A	Clear	ABS (Anti-lock Braking System) Pump
F5	20A	Yellow	Headlights (Low Beam - Left)
F6	20A	Yellow	Headlights (Low Beam - Right)
F7	15A	Blue	Headlights (High Beam - Left)
F8	15A	Blue	Headlights (High Beam - Right)
F9	30A	Green	Trailer Brake Controller Power
F10	20A	Yellow	Blower Motor Main Power
F11	10A	Red	Ignition Switch (Main Power)
F12	10A	Red	Engine Sensors (Various)
F13	10A	Red	A/C Clutch Relay Control
F14	20A	Yellow	Auxiliary Power Outlet (Under-hood)

Relay Locations (Under-Hood):

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

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Dash Kick-Panel Fuse Box (Driver's Side)

This fuse box, located on the driver's side kick panel, manages many of the interior and accessory circuits. Access is typically gained by removing a small plastic access panel. Again, always refer to your vehicle's specific fuse diagram for precise details.

Fuse #	Amperage	Color	Circuit / Component Protected
F1	15A	Blue	Radio / Infotainment System
F2	10A	Red	HVAC Control Module
F3	20A	Yellow	Cigar Lighter / 12V Power Outlet (Dash)
F4	10A	Red	Cabin Dome Lights
F5	10A	Red	Instrument Cluster
F6	15A	Blue	Wiper Motor
F7	20A	Yellow	Power Windows
F8	10A	Red	Power Mirrors
F9	5A	Tan	ABS Module (Control Power)
F10	10A	Red	Airbag Control Module (SRS)
F11	15A	Blue	Auxiliary Heater (Cab)
F12	10A	Red	Marker Lights / Clearance Lights
F13	10A	Red	Tail Lights / Parking Lights
F14	10A	Red	Brake Lights

Relay Locations (Dash Kick-Panel):

• R1: Accessory Power Relay
• R2: Wiper Motor Relay
• R3: HVAC Fan Speed Relay

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Rear Cab / Trunk / Cargo Area Fuse Box

Often located in the sleeper compartment, this fuse box controls circuits related to the rear of the vehicle, sleeper amenities, and trailer-specific functions. The exact location can vary by cab configuration.

Fuse #	Amperage	Color	Circuit / Component Protected
F1	20A	Yellow	Sleeper Auxiliary Power Outlet (12V)
F2	15A	Blue	Refrigerator Power (Sleeper)
F3	10A	Red	Sleeper Dome Lights
F4	10A	Red	Trailer Marker Lights
F5	10A	Red	Trailer Tail / Parking Lights
F6	20A	Yellow	Trailer Auxiliary Power
F7	15A	Blue	Rear HVAC Blower (Sleeper)
F8	10A	Red	ABS Trailer Power (Control)
F9	10A	Red	Trailer Stop/Turn Lights (Left)
F10	10A	Red	Trailer Stop/Turn Lights (Right)
F11	20A	Yellow	Power Inverter (Sleeper, if equipped)

Relay Locations (Rear Cab/Trunk):

• R1: Trailer Power Relay
• R2: Sleeper Accessory Relay

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How to Test a Fuse

Testing a fuse is a straightforward process:

1. Safety First: Ensure the vehicle's ignition is off and the parking brake is engaged before working with any electrical components.
2. Locate the Fuse: Refer to the fuse box diagrams above and the legend on your fuse box lid to find the suspected fuse.
3. Visual Inspection: Many modern fuses have a visible wire element inside. If this wire is broken or charred, the fuse is blown.
4. Use a Fuse Tester or Multimeter: For a more definitive test, especially with non-transparent fuses:
   • Fuse Tester: These inexpensive tools light up if the fuse is good. Simply touch the probes to the two test points on top of the fuse (while it's still in the fuse box, if accessible, or removed).
   • Multimeter: Set your multimeter to the continuity setting (often indicated by a speaker icon). With the fuse removed, touch one probe to each metal blade of the fuse. A good fuse will show a reading of near zero ohms or beep, indicating continuity. A blown fuse will show an open circuit (no reading or no beep).
5. Replace (If Blown): If the fuse is blown, replace it with a new fuse of the exact same amperage rating and type. Using a fuse with a higher rating can lead to serious electrical damage or fire.

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Common Blown Fuses on This Vehicle

While any fuse can blow, some circuits are prone to experiencing issues more frequently due to the components they protect or the loads they carry. On a 2022 Volvo VNL, common culprits for blown fuses often include:

• Cigar Lighter / 12V Power Outlets (Dash/Sleeper): These often blow when overloaded by accessories like phone chargers, portable heaters, or power inverters that draw too much current. First, check the accessories plugged in and disconnect them.
• Trailer Brake Controller Power / Trailer Auxiliary Power: Issues with trailer wiring, shorts in a trailer, or excessive draw from trailer accessories can cause these fuses to blow. Firstly, inspect the trailer wiring harness for damage or corrosion.
• Blower Motor: A failing blower motor, or one working too hard against a clogged cabin air filter, can draw excessive current and blow its fuse. First, check the function of the blower motor at different speeds and inspect the cabin air filter.
• Headlights / Tail Lights: While less common for newer vehicles, an intermittent short in a bulb socket or wiring can eventually lead to a blown fuse. First, check the bulb filaments and look for any signs of water intrusion or damaged wiring around the light assemblies.
• Radio / Infotainment: Sometimes, a short within an aftermarket accessory connected to the radio, or an internal fault, can cause this fuse to blow. First, ensure no aftermarket accessories are causing the issue.

Always remember to check the simplest causes first before delving into more complex diagnostics. If a fuse repeatedly blows after replacement, it indicates an underlying electrical problem that needs professional attention.

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