2016 Kenworth T680 Fuse Box Diagram
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Quick answer
Your 2016 Kenworth T680 has two main fuse box locations:
- Interior Fuse Box: Located in the cabin, behind the kick panel on the passenger side.
- Engine Compartment Fuse Box: Found under the hood, near the firewall on the driver's side.
Interior Fuse Box
This fuse box contains most of the fuses for in-cab electronics and accessories. To access it, you'll need to remove the passenger-side kick panel.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 1 | 15A | Blue | Dome Lights, Sleeper Lights |
| 2 | 10A | Red | Radio, Infotainment System |
| 3 | 20A | Yellow | Cigar Lighter / 12V Power Outlet |
| 4 | 15A | Blue | Instrument Cluster |
| 5 | 10A | Red | Airbag System |
| 6 | 30A | Green | Blower Motor |
| 7 | 10A | Red | Ignition Switch |
| 8 | 15A | Blue | Turn Signals, Hazard Lights |
| 9 | 10A | Red | ABS Control Module |
| 10 | 20A | Yellow | HVAC Controls |
| 11 | 15A | Blue | Wipers |
| 12 | 10A | Red | Mirror Heat |
Engine Compartment Fuse Box
This fuse box, also known as the Power Distribution Center, is located under the hood on the driver's side, near the firewall. It houses the high-amperage fuses and relays for the engine and chassis systems.
| Fuse # / Relay | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F1 | 60A | Yellow | Main Power |
| F2 | 40A | Orange | ABS Pump Motor |
| F3 | 30A | Green | Trailer Brake Control |
| F4 | 20A | Yellow | Fuel Pump |
| F5 | 15A | Blue | ECM / PCM |
| F6 | 15A | Blue | Ignition Coils |
| F7 | 20A | Yellow | A/C Clutch |
| F8 | 15A | Blue | Headlights (Low Beam) |
| F9 | 15A | Blue | Headlights (High Beam) |
| F10 | 10A | Red | Tail / Park Lights |
| R1 | - | - | Starter Relay |
| R2 | - | - | Fuel Pump Relay |
| R3 | - | - | A/C Clutch Relay |
| R4 | - | - | Headlight Relay |
Note: Fuse numbers and circuits can vary based on your truck's specific trim and options. Always verify with the diagram printed on the inside of your fuse box lid.
How to test a fuse
Testing a fuse is a simple process. You can do it with the fuse in or out of the fuse box.
-
Visually Inspect: Pull the fuse straight out of its slot. Hold it up to the light and look at the thin metal strip inside. If the strip is broken, the fuse is blown and needs to be replaced.
-
Use a Multimeter: For a more accurate test, set your multimeter to the continuity setting. Touch the probes to each of the two metal tabs on top of the fuse. If the multimeter beeps or shows a reading of zero, the fuse is good. If it doesn't beep or the reading is "OL" (overload), the fuse is blown.
Common blown fuses on this vehicle
-
Cigar Lighter / 12V Power Outlet: This is one of the most common blown fuses, often due to a faulty phone charger or other accessory plugged into the outlet. If the fuse is blown, inspect the outlet for any foreign objects before replacing the fuse.
-
Trailer Brake Control: If you frequently tow heavy loads, the trailer brake fuse can blow. This could be due to a short in the trailer wiring or a faulty brake controller. Check the trailer wiring harness for any damage before replacing the fuse.
-
Fuel Pump: A blown fuel pump fuse will prevent the engine from starting. If you suspect a blown fuel pump fuse, also check the fuel pump relay. A failing fuel pump can draw too much current and cause the fuse to blow repeatedly.
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Before you pull a fuse on the 2016 Kenworth T680
- 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 Kenworth T680
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 Kenworth T680 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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