2016 Freightliner M2 106 Fuse Box Diagram
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Quick answer
Your 2016 Freightliner M2 106 has one primary fuse box, known as the Power Distribution Module (PDM) or fuse and relay block. It is located inside the cab, on the passenger side, behind a kick panel at the front of the footwell.
Passenger-Side Dash Fuse Box / Power Distribution Module (PDM)
The main fuse and relay center is located on the passenger side of the cab, behind the kick panel. To access it, you will need to remove the panel, which may require turning a few retaining clips or removing a screw. The inside of the cover panel contains a printed legend that will show you the exact layout for your truck's specific configuration.
Fuses
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F1 | 30A | Green | ABS Module Power |
| F2 | 20A | Yellow | Trailer Marker Lights |
| F3 | 20A | Yellow | Ignition Switch |
| F4 | 30A | Green | Trailer ABS Power |
| F5 | 10A | Red | HVAC Controller |
| F6 | 15A | Blue | Turn Signal Flasher |
| F7 | 10A | Red | Gauge Power (Ignition) |
| F8 | 30A | Green | Windshield Wipers |
| F9 | 10A | Red | Engine Control Module (ECM) - Ignition |
| F10 | 15A | Blue | Diagnostic Port Power |
| F11 | 20A | Yellow | Cigar Lighter / 12V Power Outlet |
| F12 | 10A | Red | Dome Lights, Courtesy Lamps |
| F13 | 30A | Green | Blower Motor |
| F14 | 5A | Tan | Bulkhead Module |
| F15 | 15A | Blue | Radio, Infotainment System |
| F16 | 20A | Yellow | Fuel Pump |
| F17 | 10A | Red | Airbag / Supplemental Restraint System (SRS) |
| F18 | 10A | Red | Left Low-Beam Headlight |
| F19 | 10A | Red | Right Low-Beam Headlight |
| F20 | 10A | Red | Left High-Beam Headlight |
| F21 | 10A | Red | Right High-Beam Headlight |
| F22 | 15A | Blue | Park, Tail, and Marker Lights |
| F23 | 20A | Yellow | Trailer Brake Controller |
| F24 | 15A | Blue | A/C Clutch |
| F25 | 20A | Yellow | Brake Lights |
Note: Your vehicle's fuse layout may vary based on the options and powertrain installed. Always consult the diagram on the fuse box cover or in your owner's manual to confirm fuse locations and ratings.
Relays
| Relay # | Circuit / Component Controlled |
|---|---|
| R1 | Starter Relay |
| R2 | Ignition Main Relay |
| R3 | A/C Clutch Relay |
| R4 | Blower Motor Relay |
| R5 | Park Lamp Relay |
| R6 | Headlamp Relay |
| R7 | Fuel Pump Relay |
| R8 | Horn Relay |
How to Test a Fuse
Testing a fuse is a straightforward process. The easiest method is a visual inspection.
- Turn off the ignition and the component that isn't working.
- Locate and remove the suspect fuse. A small fuse puller tool is often included in the fuse box, but needle-nose pliers can also work.
- Hold the fuse up to the light and look at the thin metal strip inside. If the strip is broken or has a gap, the fuse is blown and needs to be replaced.
- If you can't see clearly, you can use a multimeter set to continuity or resistance (Ohms). Touch the probes to each of the two metal prongs on top of the fuse. A good fuse will show continuity (a beep or a reading of near-zero Ohms). A blown fuse will show no continuity or infinite resistance.
When replacing a fuse, always use a new fuse with the exact same amperage rating. Using a higher-rated fuse can cause severe damage to the electrical system and create a fire hazard.
Common Blown Fuses on This Vehicle
On the 2016 Freightliner M2 106, certain fuses are more prone to blowing than others due to the nature of the circuits they protect.
- F11 (Cigar Lighter / 12V Power Outlet): This is one of the most common fuses to blow. It's usually caused by a faulty phone charger, a coin falling into the outlet, or plugging in a device that draws too much power. Before replacing the fuse, inspect the outlet for any foreign objects.
- F23 (Trailer Brake Controller) & F2 (Trailer Marker Lights): Problems with trailer wiring are very common. A short circuit in the trailer's wiring harness or a faulty light on the trailer will often blow these fuses. If these fuses blow when a trailer is connected, the issue is almost certainly with the trailer, not the truck.
- F13 (Blower Motor): If the cabin fan stops working on all speeds, this fuse is the first thing to check. If it has blown, it could be due to an aging blower motor that is drawing too much current. If the new fuse blows again, the blower motor or the blower motor resistor likely needs replacement.
If you're having trouble diagnosing an electrical issue or aren't comfortable working on your vehicle, it's best to seek professional help.
Find a trusted shop on Repairius.
Before you pull a fuse on the 2016 Freightliner M2 106
- 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 2016 Freightliner M2 106
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
2016 Freightliner M2 106 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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