2015 Kenworth T680 Fuse Box Diagram & Amperage
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Quick Answer
The 2015 Kenworth T680 typically has three main fuse box locations:
- Under-hood: Located on the driver's side, near the firewall.
- Dash Kick-Panel (Interior): Situated behind a panel on the passenger side of the dashboard.
- Sleeper/Cargo Area: Often found in the bunk area, behind a trim panel or access door.
Please note that fuse box configurations can vary slightly due to vehicle options and trim levels. Always refer to the printed fuse legend on the inside of your fuse box cover(s) for the most accurate and up-to-date information for your specific vehicle.
Under-Hood Fuse Box
This fuse box primarily houses fuses and relays for critical engine functions, exterior lighting, and heavy-duty accessories. It is usually located on the driver's side, near the firewall or mounted to the frame rail. Key relays such as the starter relay and ECM relay are also found here.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F1 | 15A | Blue | Engine Control Module (ECM) Power |
| F2 | 10A | Red | Fuel Pump Relay Control |
| F3 | 20A | Yellow | Starter Solenoid |
| F4 | 15A | Blue | Ignition Switch Power |
| F5 | 25A | Clear | Headlight - Low Beam (Left) |
| F6 | 25A | Clear | Headlight - Low Beam (Right) |
| F7 | 20A | Yellow | Headlight - High Beam (Left) |
| F8 | 20A | Yellow | Headlight - High Beam (Right) |
| F9 | 10A | Red | ABS Module Power |
| F10 | 30A | Green | Blower Motor |
| F11 | 20A | Yellow | A/C Clutch |
| F12 | 15A | Blue | Trailer Brake Controller Power |
| F13 | 10A | Red | ECM Ignition |
| F14 | 10A Red | Back-up Lamps | |
| F15 | 10A Red | Marker Lamps (Left) | |
| F16 | 10A Red | Marker Lamps (Right) | |
| F17 | 15A Blue | ECU / VGT Power | |
| F18 | 15A Blue | Transmission Controller | |
| RF1 | - | - | Starter Relay |
| RF2 | - | - | ECM Relay |
| RF3 | - | - | Fuel Pump Relay |
| RF4 | - | - | Headlight High Beam Relay |
Dash Kick-Panel (Interior) Fuse Box
Located on the passenger side kick panel, or sometimes behind a removable cover on the bottom of the dashboard, this fuse box handles power distribution for interior accessories, cabin lighting, and various electronic modules. This is where you'll typically find fuses for your radio, power windows, and turn signals.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F1 | 10A | Red | Radio / Infotainment System |
| F2 | 15A | Blue | 12V Power Outlet (Cigar Lighter) |
| F3 | 10A | Red | ABS Warning Lamp |
| F4 | 7.5A | Brown | Airbag Control Module (ACM) |
| F5 | 10A | Red | Instrument Cluster |
| F6 | 15A | Blue | Wiper Motor |
| F7 | 10A | Red | Horn |
| F8 | 5A | Tan | Interior Courtesy Lights |
| F9 | 15A | Blue | Driver's Power Window |
| F10 | 15A | Blue | Passenger Power Window |
| F11 | 10A | Red | HVAC Control Panel |
| F12 | 5A | Tan | Diagnostic Port (OBD-II) |
| F13 | 10A | Red | Dome Light |
| F14 | 10A | Red | Power Mirror Adjustment |
| F15 | 20A | Yellow | Trailer ABS Power (if equipped) |
Sleeper/Cargo Area Fuse Box
For Kenworth T680 models with a sleeper cabin, an additional fuse box is often located within the sleeper compartment. This fuse box typically powers convenience features and auxiliary systems for the sleeper, such as bunk lighting, power outlets, and entertainment systems. The exact location can vary, but it
Before you pull a fuse on the 2015 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 2015 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
2015 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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