2018 Tesla Model X Fuse Box Diagram & Amperage
AI-generated reference. Always verify torque values, fluid capacities, intervals, and procedures against the manufacturer's service manual or OEM repair information before performing work. Repairius is not liable for damage from acting on this content without verification.
Working on this 2018 Tesla Model X? Run just this one job through Repairius.
No big switch. Write the estimate, text it for approval, and get paid on your phone. Keep everything else the way it is.
14-day free trial · credit card required · cancel anytime
Quick Answer
The 2018 Tesla Model X features fuse boxes in three primary locations: under the hood (front trunk), in the left-hand side of the dash kick panel, and in the rear cargo area.
Front Trunk Fuse Box
The front trunk fuse box is located under the "frunk" cover, typically on the passenger side. This fuse box primarily handles power distribution for various powertrain and essential vehicle systems.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F1 | 20A | Yellow | Powertrain Control Module (PCM) |
| F2 | 15A | Blue | Fuel Pump |
| F3 | 10A | Red | Ignition System |
| F4 | 30A | Green | Starter Relay |
| F5 | 10A | Red | Headlight - Left Low Beam |
| F6 | 10A | Red | Headlight - Right Low Beam |
| F7 | 10A | Red | Headlight - Left High Beam |
| F8 | 10A | Red | Headlight - Right High Beam |
| F9 | 20A | Yellow | ABS Pump Motor |
| F10 | 15A | Blue | A/C Compressor Clutch |
| F11 | 25A | Clear | Blower Motor |
Relays: The front trunk fuse box also houses several relays, including the starter relay (R1), fuel pump relay (R2), and ABS pump relay (R3). Specific locations are usually marked on the fuse box cover.
Dash Kick Panel Fuse Box
The dash kick panel fuse box is located on the left-hand side of the dashboard, accessible by removing the side panel when the driver's door is open. This fuse box typically controls interior electrical components and accessories.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F1 | 10A | Red | Radio / Infotainment System |
| F2 | 15A | Blue | 12V Power Outlet (Front/Console) |
| F3 | 7.5A | Brown | Airbag System (Supplemental Restraint System - SRS) |
| F4 | 5A | Tan | Instrument Cluster |
| F5 | 10A | Red | Brake Lights |
| F6 | 10A | Red | Tail Lights / Parking Lights |
| F7 | 20A | Yellow | Power Windows (Driver) |
| F8 | 20A | Yellow | Power Windows (Passenger) |
| F9 | 10A | Red | Wipers |
| F10 | 15A | Blue | Power Side Mirrors |
Relays: Common relays in this area include those for power windows (R1) and the wiper motor (R2). Refer to your Tesla owner's manual or the fuse box diagram on the cover for precise relay locations.
Rear Cargo Area Fuse Box
The rear cargo area fuse box is typically located on the left side, behind a removable trim panel. This fuse box often services components in the rear of the vehicle, including the charging system and certain accessories.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F1 | 20A | Yellow | 12V Power Outlet (Cargo Area) |
| F2 | 15A | Blue | Cabin Fuse Box Power Supply |
| F3 | 30A | Green | Trailer Brake Controller (if equipped) |
| F4 | 20A | Yellow | Supercharger Port |
| F5 | 25A | Clear | Rear Blower Motor (HVAC) |
| F6 | 10A | Red | Rear Tail Lights |
| F7 | 10A | Red | Rear Trunk Latch |
Relays: Relays in the rear cargo area might include those for the trailer brake control (R1, if equipped) and the rear liftgate (R2). Consult the fuse box cover for accurate mapping.
How to Test a Fuse
Testing a fuse is a straightforward process and a good first step in diagnosing an electrical issue. Here's how:
- Safety First: Ensure the vehicle is off and the key is removed from the ignition (or in the "off" position for keyless systems) before working with fuses. You may even consider disconnecting the 12V auxiliary battery, especially for critical systems.
- Locate the Fuse Box: Identify the correct fuse box based on the circuit you're troubleshooting.
- Identify the Suspect Fuse: Refer to the fuse diagram on the fuse box cover or in your owner's manual to pinpoint the fuse protecting the problematic component.
- Visual Inspection: Pull the fuse straight out using a fuse puller (usually found in one of the fuse boxes). Hold the fuse up to the light and visually inspect the metal wire inside. If the wire is broken or melted, the fuse is blown and needs to be replaced.
- Multimeter Test (for less obvious breaks): If a visual inspection isn't conclusive, use a multimeter set to the continuity or resistance (ohms) setting. Touch the probes to the two metal terminals on top of the fuse. A good fuse will show continuity (a beep or a reading close to zero ohms). A blown fuse will show no continuity or an open circuit (OL or infinity).
- Replace: Always replace a blown fuse with a new fuse of the exact same amperage (AMP) rating and type. Using a fuse with a higher rating can lead to serious electrical damage or fire.
Common Blown Fuses on This Vehicle
While Tesla vehicles are generally reliable, certain fuses can blow more frequently due to usage patterns or specific component demands. If you experience an issue, here are some common culprits and what to check:
- 12V Power Outlets (Cigar Lighter): These are common failure points due to overcurrent from charging devices or using high-power accessories. If a 12V outlet isn't working, check the relevant fuse in the dash kick panel or rear cargo area fuse box first.
- Infotainment / Radio: Issues with the touchscreen or audio system can sometimes be resolved by checking the infotainment fuse in the dash kick panel. A temporary glitch might cause a surge, blowing the fuse.
- Blower Motor: If your climate control fan isn't working, the blower motor fuse (often in the front trunk fuse box) is a good place to start. A failing motor can draw too much current and blow the fuse.
- Trailer Brake Controller (if equipped): If you're experiencing issues with your trailer brakes, the dedicated fuse in the rear cargo area is a primary suspect. Overloading or a short in the trailer wiring can cause this fuse to blow.
Always verify the printed legend in the fuse box lid or your owner's manual before replacing any fuse, as trim variations and model year updates can lead to differences in fuse assignments.
Find a trusted shop on Repairius.
Before you pull a fuse on the 2018 Tesla Model X
- 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 Tesla Model X
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 Tesla Model X Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
Browse by make
Running an auto or diesel repair shop?
Compare Repairius to the shop software you're paying for
$99.99/month (first location included), unlimited users, 14-day free trial.