2020 Tesla Model 3 Fuse Box Diagram & Amperage

Quick Answer

The 2020 Tesla Model 3 features multiple fuse box locations to protect its advanced electrical systems. You'll find fuse boxes in the following locations:

• Front Under-hood (Frunk) Fuse Box: Located in the front trunk area, typically on the passenger side.
• Cabin Fuse Box: Situated behind the glove compartment.
• Rear Under-trunk Fuse Box: Found in the rear trunk, often under the cargo floor or trim.

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Front Under-hood (Frunk) Fuse Box

This fuse box primarily houses fuses for major vehicle systems and components located in the front of the vehicle, including parts of the powertrain, charging system, and some driver-assist features. Always refer to the legend on the fuse box cover for the exact layout for your specific trim level.

Fuse #	Amp	Color	Circuit / Component Protected
F1	25A	Natural	Front Drive Unit Inverter (Some Trims)
F2	10A	Red	HVAC System Control Module
F3	15A	Blue	Air Conditioning Compressor Clutch
F4	20A	Yellow	Main Contactor / Pre-Charge Circuit (HV Battery)
F5	5A	Tan	Left Low Beam Headlight
F6	5A	Tan	Right Low Beam Headlight
F7	10A	Red	Left High Beam Headlight
F8	10A	Red	Right High Beam Headlight
F9	15A	Blue	Autopilot Computer / Front Camera System
F10	20A	Yellow	DC-DC Converter (Low Voltage System Charging)
F11	10A	Red	Windshield Wiper Motor
F12	5A	Tan	Horn
F13	15A	Blue	Front Power Outlet (12V)
F14	5A	Tan	Front Radar Sensor
F15	7.5A	Brown	Brake System Control Module (ABS)
F16	5A	Tan	Steering Wheel Controls / Indicator Stalks

Relay Locations (Front Under-hood):

• R1: Air Conditioning Compressor Relay
• R2: Horn Relay
• R3: Wiper Motor Relay

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Cabin Fuse Box (Behind Glove Compartment)

This fuse box manages power distribution for many interior components, including the infotainment system, power windows, interior lighting, and various control modules. Accessing it may require removing the glove compartment or trim panels.

Fuse #	Amp	Color	Circuit / Component Protected
F1	10A	Red	Infotainment System / Touchscreen
F2	15A	Blue	Radio / Audio Amplifier
F3	5A	Tan	Instrument Cluster / Driver Display (if applicable)
F4	7.5A	Brown	Airbag (SRS) Control Module
F5	10A	Red	Power Window - Driver Side
F6	10A	Red	Power Window - Passenger Side
F7	5A	Tan	Interior Cabin Lights
F8	7.5A	Brown	USB Ports / Wireless Charger
F9	15A	Blue	Seat Heaters (Front)
F10	10A	Red	Blower Motor Control Module
F11	5A	Tan	OBD-II Diagnostic Port
F12	10A	Red	Power Mirrors
F13	5A	Tan	Sunroof / Panoramic Roof Control (if equipped)
F14	7.5A	Brown	Key Fob / Key Card Sensor
F15	15A	Blue	Rear Power Outlet (12V)

Relay Locations (Cabin):

• R1: Blower Motor Relay
• R2: Accessory Power Relay

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Rear Under-trunk Fuse Box

This fuse box often contains fuses for components located in the rear of the vehicle, such as tail lights, rear charging ports, and sometimes elements related to the rear drive unit or trailer systems (if equipped). The exact location might vary slightly; check under the carpet or trim panels in the trunk.

Fuse #	Amp	Color	Circuit / Component Protected
F1	15A	Blue	Rear Drive Unit Control Module (Some Trims)
F2	10A	Red	Tail Lights / Rear Park Lights
F3	5A	Tan	Brake Lights (Stop Lights)
F4	7.5A	Brown	Rear Fog Lights (if equipped)
F5	10A	Red	Turn Signals (Rear)
F6	15A	Blue	Rear Wiper Motor / Washer Pump (if equipped)
F7	20A	Yellow	Power Trunk / Hatch Motor
F8	5A	Tan	Rearview Camera
F9	7.5A	Brown	Rear Seat Heaters
F10	10A	Red	Trailer Brake Controller (if equipped)
F11	5A	Tan	Vehicle Charge Port Lighting
F12	15A	Blue	Rear 12V Accessory Outlet / USB Ports

Relay Locations (Rear Under-trunk):

• R1: Power Trunk/Hatch Relay
• R2: Trailer Power Relay (if equipped)

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How to Test a Fuse

Testing a fuse is a straightforward process that can help diagnose electrical issues. Here's how:

1. Locate the Fuse Box: Identify the fuse box related to the component that's not working.
2. Consult the Diagram: Refer to the fuse diagram on the fuse box lid or in your owner's manual to identify the suspected fuse.
3. Visual Inspection: Carefully pull the fuse straight out. Most modern fuses are transparent, allowing you to see if the metal wire inside is broken or melted. If it is, the fuse is blown.
4. Use a Multimeter (for non-transparent fuses or a more accurate test):
   • Set your multimeter to the continuity setting (often indicated by a speaker or diode symbol).
   • Touch the probes to the two metal prongs on top of the fuse.
   • If the multimeter beeps or shows a reading close to zero ohms, the fuse is good. If there's no beep or an "OL" (open loop) reading, the fuse is blown.
5. Replace with Correct Amperage: If a fuse is blown, replace it with a new fuse of the exact same amperage rating and type. Never substitute a higher-rated fuse, as this can lead to severe electrical damage or fire.

Always turn off the ignition and any affected components before inspecting or replacing fuses.

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Common Blown Fuses on This Vehicle

While the 2020 Tesla Model 3 is a highly reliable vehicle, certain electrical accessories can experience issues leading to blown fuses. Here are a few common ones and what to check:

• 12V Power Outlets (Cigar Lighter): If your front or rear 12V outlets aren't working, check the corresponding fuses (F13 in the Front Frunk, F15 in the Cabin, F12 in the Rear Trunk). Often, these blow due to overdrawn power from accessories like phone chargers, air compressors, or portable refrigerators. Ensure the devices you plug in are within the outlet's power limits.
• Infotainment / Touchscreen: While less common, issues with the central touchscreen or related audio components (F1 and F2 in the Cabin fuse box) can sometimes be traced to a blown fuse. Before suspecting a fuse, try a soft reset of the touchscreen as per your owner's manual, as many minor glitches can be resolved this way.
• Blower Motor: If your HVAC fan isn't working on any setting, the blower motor fuse (F10 in the Cabin fuse box) or its relay (R1 in the Cabin) might be the culprit. A failing blower motor itself can sometimes cause the fuse to blow due to excessive current draw.
• Headlights: If one of your headlights (F5, F6, F7, F8 in the Front Frunk) is out, it's worth checking the fuse, though often the issue is with the LED module itself in modern vehicles. Always check the fuse first as it's a simpler fix.

What to check first: If you have an electrical component malfunction, always start by checking the corresponding fuse. However, with Tesla's advanced diagnostics, the vehicle may also present an alert on the touchscreen. If repeating fuse failures occur, it indicates a deeper issue that requires professional diagnosis.

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