2022 Kenworth T680 Fuse Box Diagram & Amperage
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Quick answer
Most 2022 Kenworth T680s have a single primary fuse box located inside the cab. It's on the passenger side, behind a kick panel at the bottom of the dash. You may also find a smaller, secondary fuse panel in the engine compartment on the driver's side, near the firewall.
In-Cab Fuse Box
This is the main fuse box. You'll find it behind the passenger-side kick panel.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F1 | 15A | Blue | Cigar Lighter / 12V Power Port 1 |
| F2 | 15A | Blue | Cigar Lighter / 12V Power Port 2 |
| F3 | 10A | Red | Radio / Infotainment System |
| F4 | 20A | Yellow | Blower Motor |
| F5 | 10A | Red | A/C Clutch |
| F6 | 15A | Blue | Ignition Switch |
| F7 | 20A | Yellow | Fuel Pump |
| F8 | 15A | Blue | Starter Relay |
| F9 | 10A | Red | Low Beam Headlights (Left) |
| F10 | 10A | Red | Low Beam Headlights (Right) |
| F11 | 15A | Blue | High Beam Headlights |
| F12 | 10A | Red | Tail / Park Lights |
| F13 | 15A | Blue | Brake Lights |
| F14 | 20A | Yellow | ABS Control Module |
| F15 | 10A | Red | Airbag / SRS |
| F16 | 30A | Green | Trailer Brake Control |
| F17 | 20A | Yellow | ECM / PCM |
Relay Locations:
- R1: Starter Relay
- R2: Fuel Pump Relay
- R3: Ignition Relay
- R4: A/C Clutch Relay
- R5: Blower Motor Relay
Under-Hood Fuse Box
This smaller panel is usually on the driver's side of the engine bay.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 1 | 60A | Yellow | Main Cabin Power |
| 2 | 40A | Orange | ABS Pump Motor |
| 3 | 30A | Green | Engine Cooling Fan |
How to test a fuse
A blown fuse is a common culprit for electrical problems. Here's how to check one:
- Turn off the ignition.
- Locate the fuse box.
- Remove the fuse in question. A fuse puller tool makes this easier.
- Inspect the fuse. Look at the thin metal strip inside. If it's broken, the fuse is blown.
- Use a multimeter (optional). For a more definitive test, set your multimeter to continuity. Touch the probes to each end of the fuse. If it beeps, the fuse is good.
Common blown fuses on this vehicle
- Cigar Lighter / 12V Power Port: These often blow from plugging in high-draw devices. Check the device you were using for a short or damage.
- Trailer Brake Control: Faulty trailer wiring is the most common cause. Inspect the trailer's wiring harness and connectors for any corrosion or loose wires.
Always verify the fuse layout with the diagram printed on the inside of your fuse box lid, as configurations can vary based on your truck's specific options and trim level.
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Before you pull a fuse on the 2022 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 2022 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
2022 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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Values can vary by engine, trim and build date; check your VIN-specific service information. Updated 2026-10-10.