2015 Toyota Highlander Fuse Box Diagram & Amperage Guide

Quick Answer

The 2015 Toyota Highlander features multiple fuse box locations to protect its electrical systems: one under the hood, one in the driver's side kick panel, and one in the cargo area.

Under-Hood Fuse Box

This fuse box contains fuses and relays for critical engine components, headlights, and other high-current systems. It's typically located on the passenger side of the engine bay, near the battery.

Relays: The under-hood fuse box also houses various relays, including the Fuel Pump Relay, Starter Relay, Headlight Relays, ABS Relays, and Cooling Fan Relays. Their exact locations are usually marked on the fuse box lid.

Driver's Side Kick Panel Fuse Box

This interior fuse box is located behind a removable panel in the driver's side footwell, often adjacent to the left kick panel. It primarily protects accessories and interior electrical components.

Cargo Area Fuse Box

Some 2015 Toyota Highlander models may also have a fuse box located in the cargo area, often behind a trim panel on the driver's or passenger's side. This fuse box typically controls power outlets and other rear-specific accessories.

How to Test a Fuse

Testing a fuse is a straightforward process. You'll need a fuse puller (usually found in one of the fuse boxes) and a multimeter or a fuse tester.

1. Safety First: Ensure the vehicle's ignition is off before removing or inserting fuses.
2. Locate the Fuse: Refer to the fuse box diagram on the lid or in your owner's manual to identify the fuse for the circuit you're troubleshooting.
3. Remove the Fuse: Use the fuse puller to carefully remove the suspected fuse. Never use metal tools that could short circuits.
4. Visual Inspection: Hold the fuse up to the light. If the metal wire or filament inside is broken or charred, the fuse is blown and needs replacement.
5. Test with a Multimeter (Optional but recommended):
   • Set your multimeter to the continuity setting (often indicated by a speaker icon).
   • Touch one probe to each metal terminal on top of the fuse. A good fuse will show continuity (the multimeter will beep or display a "0" or close to "0" reading).
   • If there's no continuity, the fuse is blown.
6. Replace the Fuse: Always replace a blown fuse with a new one of the exact same amperage and type. Using a fuse with a higher amperage can lead to serious electrical damage or fire.

Common Blown Fuses on This Vehicle

While any fuse can blow, certain circuits are more prone to issues due to their usage or the components they protect. On the 2015 Toyota Highlander, common blown fuses might include:

• CIG/12V Outlets: These fuses (CIG, FR P/OUTLET, RR P/OUTLET) frequently blow when an overloaded device is plugged in or if a coin/foreign object shorts the outlet. If an outlet isn't working, check these first.
• Radio/Infotainment (ACC, RADIO, IG1): Issues with aftermarket installations, short circuits in components, or simply a prolonged accessory draw can cause these fuses to blow, leading to a dead radio or infotainment system.
• Brake Lights (STOP): A blown STOP fuse will result in no brake lights, which is a safety hazard. This can be caused by a short in the wiring or a faulty brake light switch. If your brake lights aren't working, check this fuse immediately.
• Headlights (HEAD LH/RH LO/HI): While modern headlights are more robust, a short within a bulb or wiring could still blow a headlight fuse, resulting in a dark headlamp.
• Blower Motor (HTR, FAN NO.1/NO.2): If your HVAC fan isn't working at all, major fuses like HTR in the under-hood box, or FAN NO.1/NO.2 could be the culprits. Issues often stem from a failing blower motor or resistor drawing too much current.

What to Check First: Before assuming a blown fuse, always consider the component that isn't working. For example, if your radio is dead, first check the relevant radio/accessory fuses. If a particular light isn't working, check its corresponding fuse. Consult your owner's manual or the fuse box lid for the most accurate fuse assignments for your specific trim level, as there can be minor variations.

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