2017 Toyota Tundra Fuse Box Diagram & Amperage
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Quick answer
The 2017 Toyota Tundra features three main fuse box locations: under the hood, under the driver's side dashboard (kick panel), and behind the passenger side kick panel. There is no fuse box in the trunk or cargo area of the Tundra.
Under-Hood Fuse Box (Engine Compartment)
Located on the driver's side of the engine compartment, near the battery. This box contains fuses and relays for critical engine functions, headlights, and other high-current components.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| ALT | 140A | --- | Alternator |
| MAIN | 50A | Red | Main Power Source (various circuits) |
| H-LP RH-LO | 10A | Red | Right Headlight Low Beam |
| H-LP LH-LO | 10A | Red | Left Headlight Low Beam |
| H-LP HI | 10A | Red | Headlight High Beam |
| EFI NO.1 | 10A | Red | ECM/EFI System |
| EFI NO.2 | 15A | Blue | EFI System, Fuel Pump Relay |
| IGN | 10A | Red | Ignition System |
| STARTER | 30A | Green | Starter Relay |
| ABS NO.1 | 50A | Red | ABS System |
| ABS NO.2 | 30A | Green | ABS System |
| TOWING B/U | 30A | Green | Trailer Brake Controller Backup |
| TOWING BRK | 30A | Green | Trailer Brake Controller |
| A/C MGC | 10A | Red | A/C Magnetic Clutch |
| BLOWER | 40A | Green | Blower Motor |
| WIPER | 25A | Natural | Windshield Wipers |
| HORN | 10A | Red | Horn |
| PWR OUTLET NO.1 | 15A | Blue | 12V Power Outlet (Front) |
| TAIL | 10A | Red | Tail Lights, Parking Lights |
| STOP | 10A | Red | Stop Lights, High Mount Stop Light |
Relay Locations (Under-Hood):
The under-hood fuse box also houses several important relays, often labeled on the fuse box cover.
- EFI Relay: Controls power to the EFI system and fuel pump.
- STARTER Relay: Engages the starter motor.
- HORN Relay: Activates the horn.
- A/C MG CLT Relay: Operates the A/C compressor clutch.
- HEADLIGHT Relays: Control the headlight circuits.
Driver's Side Dashboard Fuse Box (Instrument Panel)
This fuse box is located behind the kick panel on the driver's side, near the floorboard. It protects circuits for interior accessories and various body control modules.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| P/OUTLET NO.2 | 15A | Blue | 12V Power Outlet (Rear) |
| CIG | 15A | Blue | Cigarette Lighter |
| RADIO | 10A | Red | Audio System/Infotainment |
| ACC | 10A | Red | Accessory Power (radio, clock, etc.) |
| DOME | 10A | Red | Interior Dome Lights, Map Lights |
| PANEL | 10A | Red | Instrument Panel Illumination |
| ECU-IG NO.1 | 10A | Red | ECU-Ignition (various control modules) |
| ECU-IG NO.2 | 10A | Red | ECU-Ignition (various control modules) |
| GAUGE | 10A | Red | Instrument Cluster, Gauges |
| WIP S | 10A | Red | Wiper System (switch circuit) |
| MIRROR | 10A | Red | Power Mirrors |
| POWER WINDOW | 30A | Green | Power Window System |
| SRS-AIRBAG | 10A | Red | Supplemental Restraint System (Airbag) |
| HEATER | 10A | Red | HVAC Control Panel |
| PWR SEAT | 30A | Green | Power Seats (if equipped) |
Relay Locations (Driver's Side Dashboard):
While less common than the under-hood box, some relays may be integrated into the dashboard fuse box or nearby. Consult your owner's manual for exact locations.
Passenger's Side Dashboard Fuse Box
Some 2017 Tundra models include a smaller fuse box behind the passenger's side kick panel. This box typically houses fuses for components such as the passenger power seat or additional auxiliary power. Consult your specific vehicle's owner's manual for details, as configurations can vary by trim level.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| P.SEAT LH | 30A | Green | Passenger Power Seat Left (if equipped) |
| P.SEAT RH | 30A | Green | Passenger Power Seat Right (if equipped) |
| SUB BATT | 10A | Red | Secondary Battery System (if equipped) |
How to Test a Fuse
Testing a fuse is a straightforward process that can help you quickly identify a blown fuse.
- Safety First: Always turn off the ignition and remove the key before working with fuses. If working under the hood, disconnect the battery's negative terminal for extra safety.
- Locate the Fuse: Identify the suspected fuse using the diagrams above and your vehicle's owner's manual or the legend on the fuse box cover.
- Visual Inspection: Many modern fuses have a small wire visible through the top. If this wire is broken or melted, the fuse is blown. Transparent fuses allow for easy visual inspection.
- Use a Fuse Tester: For opaque fuses or to be certain, use a fuse tester or a multimeter. With the ignition off, touch the probes of the tester to the two test points on the top of the fuse. If the tester lights up (or shows continuity on a multimeter), the fuse is good. If there's no light, the fuse is blown.
- Replacement: If a fuse is blown, replace it with a new fuse of the exact same amperage (and physical size). Using a fuse with a higher amperage can cause serious electrical damage or even a fire.
Common Blown Fuses on This Vehicle
While fuses can blow for various reasons, some circuits are prone to blowing more often due to usage or potential issues.
- CIG/P/OUTLET Fuses: The cigarette lighter and 12V power outlets (Fuses: CIG, PWR OUTLET NO.1, P/OUTLET NO.2) are common culprits. Overloading them with too many accessories or faulty devices can cause them to blow. If yours blows, first unplug all devices and try replacing the fuse. If it blows again immediately, there might be a short in the circuit itself.
- RADIO/ACC Fuses: Issues with aftermarket radios or accessories connected to the accessory circuit (Fuses: RADIO, ACC) can lead to blown fuses. Check any recently installed components.
- STOP Fuse: A blown STOP fuse will cause your brake lights to fail, which is a significant safety hazard. Often, this can be caused by a faulty brake light switch or a short in the wiring of the brake light system. Always check all brake lights if this fuse blows.
- BLOWER Fuse: If your climate control fan stops working, the BLOWER fuse is a good place to start. A failing blower motor or a blockage in the blower fan can sometimes cause it to draw excessive current, blowing the fuse.
Always remember to consult your 2017 Toyota Tundra's owner's manual for the most accurate and detailed fuse box diagrams and specific trim variations.
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Before you pull a fuse on the 2017 Toyota Tundra
- 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.
- Disconnect the battery before working near high-current fuses or cables.
Learn more: How fuses, relays and truck electrical systems work
More specs for the 2017 Toyota Tundra
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 Toyota Tundra 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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