2021 Jeep Grand Cherokee: Fuse Box Diagram & Amperage
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Quick answer
The 2021 Jeep Grand Cherokee has three primary fuse box locations:
- Under the hood: In the engine compartment, on the driver's side.
- Interior: Under the dashboard, near the driver's side kick-panel.
- Trunk/Cargo Area: In the rear of the vehicle, on the driver's side.
Under-Hood Fuse Box
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F01 | 40A | Green | ABS Pump |
| F02 | 30A | Pink | ABS Valves |
| F03 | 20A | Blue | Starter Motor Relay |
| F05 | 20A | Blue | Ignition Coils |
| F06 | 30A | Pink | PCM / ECM (Powertrain Control Module) |
| F10 | 20A | Blue | Fuel Pump Relay |
| F11 | 15A | Light Blue | A/C Clutch Relay |
| F20 | 15A | Light Blue | Left Headlight (Low Beam) |
| F21 | 15A | Light Blue | Right Headlight (Low Beam) |
| F22 | 10A | Red | Left Headlight (High Beam) |
| F23 | 10A | Red | Right Headlight (High Beam) |
| F30 | 30A | Pink | Blower Motor Relay |
| F35 | 25A | Natural | Trailer Tow Connector |
Relay Locations:
- Starter Relay: R02
- Fuel Pump Relay: R05
- A/C Clutch Relay: R08
- Blower Motor Relay: R12
Interior Fuse Box (Driver's Kick-Panel)
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F100 | 10A | Red | Airbag Module |
| F102 | 15A | Light Blue | Radio / Uconnect Infotainment System |
| F105 | 10A | Red | Brake Switch |
| F108 | 20A | Blue | Cigar Lighter / 12V Power Outlet (Front) |
| F110 | 10A | Red | Tail Lights / Park Lights |
Trunk/Cargo Area Fuse Box
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F201 | 20A | Blue | Rear 12V Power Outlet |
| F203 | 15A | Light Blue | Cabin Fuse (Interior Lights) |
Note: Fuse numbers and circuits can vary based on your vehicle's specific trim level and options. Always confirm by checking the legend printed on the inside of your fuse box cover.
How to test a fuse
- Turn off the ignition.
- Locate the fuse box and remove the cover.
- Identify the suspect fuse.
- Remove the fuse using a fuse puller (often included in the fuse box).
- Visually inspect the fuse. A blown fuse will have a broken or melted metal strip inside.
- Use a multimeter for a more accurate test. Set it to continuity (the icon looks like a sound wave). Touch the probes to each end of the fuse. A good fuse will cause the multimeter to beep. No beep means the fuse is blown.
Common blown fuses on this vehicle
- Cigar Lighter / 12V Power Outlet Fuse: This is one of the most common fuses to blow. Often, a faulty phone charger or other accessory is the culprit. Before replacing the fuse, unplug everything from the power outlets.
- Radio / Infotainment Fuse: If your radio or Uconnect screen is dead, this fuse is the first thing to check. Sometimes, a software glitch can cause a power surge that blows the fuse.
- Trailer Tow Fuse: If you frequently tow a trailer, this fuse can blow if there's a short in the trailer's wiring.
Find a trusted shop on Repairius.
Before you pull a fuse on the 2021 Jeep Grand Cherokee
- 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 2021 Jeep Grand Cherokee
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
2015 Grand Cherokee
2016 Grand Cherokee
2017 Grand Cherokee
2018 Grand Cherokee
2019 Grand Cherokee
2020 Grand Cherokee
Maintenance & repair guides
2021 Jeep Grand Cherokee 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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