2017 Volvo VNL Fuse Box Diagram & Amperages
A complete fuse box and relay reference guide for the 2017 Volvo VNL, including locations, amperage, and protected circuits.
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As an ASE-certified master technician, I know firsthand that when a heavy-duty truck like the 2017 Volvo VNL experiences an electrical issue, every minute of downtime costs money. Knowing exactly where to look for a blown fuse or a faulty relay is critical for getting your rig back on the road. Below is a comprehensive guide to the fuse box locations, amperage ratings, and circuit diagrams for the 2017 Volvo VNL.
Disclaimer: Volvo VNL configurations can vary significantly based on the engine (Volvo D13 vs. Cummins ISX), sleeper configuration, and optional equipment. Always verify the fuse layout against the printed legend located on the inside of the fuse box cover.
Quick Answer: Fuse Box Locations
The 2017 Volvo VNL consolidates most of its primary electrical circuits into a single, large power distribution center.
- Main Dashboard Electrical Center: Located inside the cab, typically behind the center dash panel or accessible by removing the top dash cover directly in the center/passenger side of the dashboard.
- Battery Box / Frame Mounted Fuses: Main mega fuses (alternator, starter power, main cab power) are located near the battery box on the frame rail.
Main Dashboard Electrical Center
This primary fuse and relay center controls the vast majority of the cab and chassis electronics, including the engine control module (ECM), lighting, HVAC, and infotainment.
Fuse Diagram
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F1 | 10A | Red | Ignition / Key Switch |
| F2 | 15A | Blue | Engine Control Module (ECM) Power |
| F3 | 20A | Yellow | Fuel Pump / Fuel System |
| F4 | 30A | Green | Starter Relay Power |
| F5 | 15A | Blue | Headlights - Low Beam (Left) |
| F6 | 15A | Blue | Headlights - Low Beam (Right) |
| F7 | 15A | Blue | Headlights - High Beam |
| F8 | 10A | Red | Tail / Parking Lights |
| F9 | 20A | Yellow | Brake Lights / Stop Lamp Switch |
| F10 | 30A | Green | Blower Motor (HVAC) |
| F11 | 10A | Red | A/C Compressor Clutch |
| F12 | 30A | Green | Anti-lock Braking System (ABS) Main |
| F13 | 10A | Red | Airbag System / Supplemental Restraint |
| F14 | 15A | Blue | Radio / Infotainment System |
| F15 | 15A | Blue | Cigar Lighter / 12V Dash Outlets |
| F16 | 20A | Yellow | Sleeper Cab 12V Outlets / Accessories |
| F17 | 10A | Red | Instrument Cluster / Dashboard Display |
| F18 | 30A | Green | Trailer Brake / Trailer Auxiliary Power |
| F19 | 15A | Blue | Turn Signals / Hazard Flashers |
| F20 | 25A | Clear | Wipers / Windshield Washer Pump |
Key Relay Locations
Relays are typically housed in the same Main Dashboard Electrical Center, directly beside or above the fuses. Common relays include:
- R1: Ignition Relay
- R2: Starter Relay
- R3: Fuel Pump Relay
- R4: ECM Power Relay
- R5: Blower Motor Relay
- R6: A/C Clutch Relay
- R7: Trailer Power Relay
Battery Box / Frame Mounted Fuses
While not a traditional "box" with mini fuses, the battery box area houses high-amp mega fuses critical for the truck's operation.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| M1 | 150A | Black | Main Cab Feed / Dashboard Electrical Center Power |
| M2 | 200A | Black | Alternator Output Feed |
| M3 | 100A | Black | Liftgate / Auxiliary Frame Power (if equipped) |
How to Test a Fuse
Before you start tearing into wiring harnesses, diagnosing a blown fuse is your first step. Here is how I test fuses quickly and accurately in the shop:
- Visual Inspection: Pull the suspected fuse using a fuse puller or needle-nose pliers. Hold it up to a light source. If the metal filament inside the plastic casing is broken or blackened, the fuse is blown and must be replaced.
- Using a Multimeter (Recommended): 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 small metal test points on the top of the fuse while it is still plugged in. If the meter beeps or shows very low resistance (close to 0.00), the fuse is good. If it reads "OL" (Open Loop) or infinite resistance, the fuse is blown.
- Using a Test Light: Connect the clamp of a 12V test light to a solid ground. With the key in the "ON" position (for ignition-switched circuits), touch the probe to both exposed metal pins on top of the fuse. If the light illuminates on both sides, the fuse is good. If it lights up on only one side, the fuse is blown.
Pro Tip: Never replace a blown fuse with one of a higher amperage rating. This can cause severe damage to the wiring harness and even lead to an electrical fire.
Common Blown Fuses on this Vehicle
Heavy-duty trucks endure a lot of vibration, weather elements, and continuous use. On the 2017 Volvo VNL, a few circuits are notoriously prone to blowing fuses. Here is what to check first:
- 12V Outlets / Cigar Lighter (F15 / F16): Drivers often plug in high-draw accessories like inverters, coolers, or heavy-duty chargers. If your sleeper accessories or dash chargers stop working, check these 15A and 20A fuses immediately.
- Trailer Auxiliary Power / Trailer Brakes (F18): Because trailer pigtails are constantly connected and disconnected, they are subjected to moisture and corrosion. A short in the trailer's wiring harness will quickly pop the 30A trailer power fuse in the cab. Always check the physical connection at the gladhands and 7-way plug first.
- Blower Motor (F10): The 30A blower motor fuse can blow if the blower motor resistor fails or if the blower motor itself binds up due to dust and debris from life on the road. If replacing the fuse causes it to blow again immediately, suspect a faulty blower motor.
- Headlights / Exterior Lighting (F5, F6, F8): Road debris and moisture can damage the sealed headlight assemblies or the rear tail light housings, causing a short to ground.
Electrical gremlins can be incredibly frustrating. If you're continually popping fuses or can't trace down a dead circuit, it might be time to call in a professional.
Find a trusted shop on Repairius.
Before you pull a fuse on the 2017 Volvo VNL
- 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 2017 Volvo VNL
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
2017 Volvo VNL 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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