2025 Toyota Highlander — Fuse Box Diagram & Amperage
Complete guide to the fuse and relay locations, diagrams, and amperage ratings for the 2025 Toyota Highlander.
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Quick answer
On the 2025 Toyota Highlander, you'll find three primary fuse box locations:
- Under the hood: A large fuse and relay box is located on the driver's side of the engine bay, near the battery.
- Driver's side dash: A smaller fuse panel is situated behind a removable cover on the driver's side lower dashboard or kick panel, to the left of the steering column.
- Cargo area: A third fuse box can be found in the rear cargo area, typically on the driver's side, behind a small access panel.
Under-Hood Fuse Box
This main fuse box contains high-amperage fuses and critical system relays. The layout can vary slightly based on your Highlander's trim level and powertrain (gas vs. hybrid), so always consult the diagram printed inside the fuse box lid to confirm fuse numbers and functions.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 1 | 50A | Red | Main Battery, Alternator |
| 2 | 40A | Green | ABS/VSC (Anti-lock Brakes, Vehicle Stability Control) |
| 3 | 30A | Pink | Electric Power Steering (EPS) |
| 4 | 50A | Red | Cooling Fan Motor |
| 5 | 30A | Pink | Starter Motor |
| 6 | 20A | Blue | Headlights (High Beam, Right) |
| 7 | 20A | Blue | Headlights (High Beam, Left) |
| 8 | 15A | Blue | Headlights (Low Beam, Right) |
| 9 | 15A | Blue | Headlights (Low Beam, Left) |
| 10 | 10A | Red | A/C Compressor Clutch |
| 11 | 20A | Blue | Fuel Pump |
| 12 | 25A | Natural | ECM/PCM (Engine/Powertrain Control Module) |
| 13 | 10A | Red | Ignition Coils |
| 14 | 15A | Blue | Horn |
| 15 | 30A | Pink | Blower Motor (Main) |
| R1 | - | Black | Starter Relay |
| R2 | - | Black | A/C Clutch Relay |
| R3 | - | Black | Fuel Pump Relay |
Driver's Side Dash Fuse Box
This interior panel primarily handles cabin electronics, lighting, and accessory circuits. Access it by pulling off the small plastic cover near the driver's left knee.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 1 | 10A | Red | SRS Airbag System |
| 2 | 15A | Blue | Radio/Infotainment System, Navigation |
| 3 | 7.5A | Brown | Instrument Cluster, Gauges |
| 4 | 10A | Red | Stop Lights (Brake Lights) |
| 5 | 10A | Red | Tail Lights, Parking Lights |
| 6 | 15A | Blue | Front 12V Power Outlet (Cigar Lighter) |
| 7 | 15A | Blue | Center Console 12V Power Outlet |
| 8 | 10A | Red | Heated Seats |
| 9 | 7.5A | Brown | Power Mirrors |
| 10 | 20A | Blue | Windshield Wipers |
Cargo Area Fuse Box
This rear fuse box supports accessories and systems located in the back half of the vehicle. It's found behind an access panel on the driver's side of the cargo area.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| 1 | 25A | Natural | Power Liftgate |
| 2 | 15A | Blue | Rear 12V Cargo Power Outlet |
| 3 | 20A | Blue | Trailer Towing Lights |
| 4 | 30A | Pink | Trailer Brake Controller Power |
| 5 | 15A | Blue | Rear Audio Amplifier |
How to test a fuse
A blown fuse is a common and easy-to-fix issue. You can visually inspect a fuse to see if it's blown.
- Turn the vehicle off.
- Locate and remove the cover of the fuse box.
- Using the fuse puller tool found in the fuse box (or a pair of needle-nose pliers), gently pull the suspect fuse straight out of its slot.
- Hold the fuse up to the light. Inside the plastic body, you will see a small metal strip. If this strip is broken or melted, the fuse is blown and needs to be replaced.
- If you can't see the strip clearly, you can use a multimeter set to continuity mode. Touch the probes to each of the two metal prongs on top of the fuse. If the multimeter beeps, the fuse is good. If it remains silent, the fuse is blown.
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 vehicle's wiring and potentially start a fire.
Common blown fuses on this vehicle
- 12V Power Outlet / Cigar Lighter: This is one of the most common fuses to blow. It's often caused by a faulty phone charger, a loose coin falling into the socket, or a device that draws too much power. If the fuse blows, first check the outlet for any foreign objects before replacing the fuse.
- Headlights: If one of your headlights goes out, check the bulb first. If the bulb is good, the next logical step is to check the fuse. If a headlight fuse blows repeatedly, it could indicate a wiring short that needs professional diagnosis.
- Radio/Infotainment: If your radio or center screen suddenly goes dark, the fuse is a likely culprit. This can sometimes happen after installing a new accessory or if there is an internal fault in the head unit. Check the 15A fuse in the driver's side dash panel.
- Trailer Lights: If your connected trailer lights aren't working, the 20A "Trailer Towing Lights" fuse in the cargo area fuse box is the first place to look. Ensure your trailer wiring isn't damaged or corroded, as this is a frequent cause.
While this guide provides a common layout for the 2025 Toyota Highlander, trim levels and optional equipment can lead to variations. Always verify fuse locations and functions by checking the diagram printed on the inside of your vehicle's fuse box cover.
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Before you pull a fuse on the 2025 Toyota Highlander
- 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 2025 Toyota Highlander
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
2025 Toyota Highlander 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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