2018 Toyota Tacoma Fuse Box Diagram & Amperage
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Quick answer
The 2018 Toyota Tacoma has two primary fuse box locations: under the hood and behind the kick panel on the driver's side.
Under-Hood Fuse Box (Engine Compartment)
The under-hood fuse box contains fuses and relays for critical engine functions, headlights, and other high-current accessories. It's typically located on the driver's side of the engine compartment, near the battery. Always consult the lid of your specific fuse box for the most accurate diagram, as configurations can vary slightly.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| EFI | 10A | Red | ECM/PCM, Fuel Pump Relay |
| HORN | 10A | Red | Horn |
| HEAD LH | 10A | Red | Left Headlight (Low Beam) |
| HEAD RH | 10A | Red | Right Headlight (Low Beam) |
| HEAD HI | 10A | Red | Headlight High Beams |
| TAIL | 10A | Red | Tail Lights, Parking Lights |
| STOP | 10A | Red | Brake Lights, ABS |
| A/C | 10A | Red | A/C Compressor Clutch |
| AM2 | 15A | Blue | Ignition System, Starter Relay |
| ALT | 140A | Pink | Alternator, Main Power |
| ABS NO.1 | 50A | Red | ABS Motor |
| ABS NO.2 | 30A | Green | ABS Solenoids |
| TOWING | 30A | Green | Trailer Towing (if equipped) |
| PTC HTR | 40A | Green | PTC Heater (Supplemental cabin heat) |
| DCDC | 40A | Green | DC-DC Converter (Hybrid models) |
Relay Locations (Under-Hood K-Block)
- EFI Relay: Controls power to the ECM/PCM and fuel pump.
- HORN Relay: Activates the horn.
- HEAD LH/RH Relays: Control power to the left and right low beam headlights.
- HEAD HI Relay: Controls power to the high beam headlights.
- STARTER Relay: Engages the starter motor.
- A/C MG CLUTCH Relay: Controls the A/C compressor clutch.
Driver's Side Kick Panel Fuse Box (Cabin)
This fuse box is located inside the cabin, typically behind a panel on the driver's side kick panel, near the pedals. It houses fuses for interior accessories, radio, power windows, and other cabin electrical components.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| IGN | 10A | Red | Ignition System, Airbag System |
| ACC | 10A | Red | Accessory Power, Radio |
| RADIO | 10A | Red | Audio System, Infotainment |
| CIG | 15A | Blue | Cigarette Lighter, 12V Power Outlet |
| P/WIND | 20A | Yellow | Power Windows |
| BLOWER | 40A | Green | Blower Motor (HVAC Fan) |
| WIPER | 25A Clear | Windshield Wipers | |
| STOP | 10A | Red | Brake Lights |
| DOME | 10A | Red | Interior Lights, Clock |
| ECU-IG | 10A | Red | ECM/PCM (Ignition) |
| GAUGE | 10A | Red | Instrument Cluster |
| S/ROOF | 20A | Yellow | Sunroof (if equipped) |
| DOOR NO.1 | 20A | Yellow | Door Locks, Power Mirrors |
How to Test a Fuse
Testing a fuse is a simple process. You'll need a fuse puller (usually found in the fuse box lid or with the vehicle's tools) and a multimeter or a 12V test light.
- Locate the suspected fuse: Refer to the diagrams above and your vehicle
Before you pull a fuse on the 2018 Toyota Tacoma
- 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 2018 Toyota Tacoma
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
2018 Toyota Tacoma 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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