2020 Toyota Tacoma Fuse Box Diagram & Amperage

Quick Answer

The 2020 Toyota Tacoma has two primary fuse box locations:

• Under-Hood Fuse Box: Located in the engine bay on the driver's side, near the battery.
• Driver's Side Dash Fuse Box: Located inside the cabin, on the driver's side, behind a small panel on the lower left part of the dashboard, near the kick panel.

There is no fuse box located in the trunk or cargo area of this vehicle.

Under-Hood Fuse Box

This fuse box contains higher-amperage fuses and relays that control major vehicle systems like the engine, headlights, and charging system. You can access it by removing the black plastic cover in the engine bay. The underside of this cover contains a printed diagram of the fuse and relay locations.

Note: Fuse and relay configurations can vary slightly based on your truck's trim level (SR, SR5, TRD, Limited) and optional equipment. Always verify with the diagram on your vehicle's fuse box cover.

Main Fuse & Relay Box (Engine Bay)

Relay Locations (Under-Hood)

• Starter Relay: Controls power to the starter motor.
• Fuel Pump Relay (C/OPN): Controls the fuel pump.
• Ignition Main Relay (IG1): Provides power to main ignition circuits.
• A/C Clutch Relay (A/C MG/C): Engages the A/C compressor.
• Headlight Relays (HI, LO): Control high and low beam headlights.

Driver's Side Dash Fuse Box

This interior fuse panel handles most of the cabin and accessory circuits, including the radio, power outlets, and various electronic control units. It is located behind a removable panel labeled "FUSES" on the lower dash, to the left of the steering column.

How to Test a Fuse

Visually inspecting a fuse is the quickest way to check it. A blown fuse will have a broken or melted metal filament inside.

1. Turn the ignition off.
2. Locate and remove the suspect fuse. Use the fuse puller tool often found in the under-hood fuse box lid. If you don't have one, small needle-nose pliers will work.
3. Hold the fuse up to the light. Look at the metal strip inside the plastic housing. If it is broken or looks burnt, the fuse is blown and needs to be replaced.
4. Replace with a new fuse of the exact same amperage rating. Using a fuse with a higher rating can cause severe damage to the circuit and create a fire hazard.

For a more accurate test, you can use a multimeter set to continuity or resistance (Ohms). A good fuse will show continuity (or near-zero resistance). A blown fuse will show no continuity (infinite resistance).

Common Blown Fuses on the 2020 Tacoma

• P/OUTLET (15A): This fuse for the 12V "cigarette lighter" style power outlets is one of the most common to blow. It is often caused by a faulty phone charger, a coin falling into the socket, or plugging in a device that draws too much power. Before replacing the fuse, inspect the power socket for any foreign objects.
• RADIO (20A): If your infotainment screen suddenly goes black, this is the first fuse to check. It can sometimes blow during the installation of aftermarket stereo equipment or if there is an internal fault in the head unit.
• TOWING TAIL (30A): If you frequently tow, this fuse can blow due to faulty trailer wiring. A short circuit in the trailer's lighting system is the most common culprit. Before replacing, inspect the trailer light connector on the truck and the trailer's wiring harness for damage or corrosion.
• H-LP LO (10A): If one of your low-beam headlights goes out, check the bulb first. If the bulb is good, the corresponding "H-LP LH LO" or "H-LP RH LO" fuse is the next logical component to check before suspecting a wiring or relay issue.

Remember to always carry a set of spare fuses in your glove box. They are inexpensive and can save you from a major headache on the road.

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