2018 Jeep Grand Cherokee Fuse Box Diagram

Quick answer

Your 2018 Jeep Grand Cherokee has three primary fuse box locations:

• Power Distribution Center (PDC): Located in the engine bay, near the battery on the passenger side.
• Interior Fuse Panel: Found behind a trim panel on the driver's side of the dashboard, near the steering column.
• Rear Fuse Block: Situated in the cargo area, behind an access panel on the passenger side.

Always consult the fuse legend printed on the inside of the fuse box cover to verify fuse and relay locations for your specific trim and options.

Under-Hood Power Distribution Center (PDC)

This is the main fuse box and contains high-amperage fuses and relays for major vehicle systems. You'll find it on the passenger side of the engine compartment.

Interior Fuse Panel (Driver's Dash)

This fuse panel handles most of the fuses for the cabin electronics and interior accessories. It is located behind a pull-off panel on the driver's side of the dashboard.

Rear Fuse Block (Cargo Area)

This third fuse center manages circuits for rear-of-vehicle components and additional accessories. It’s located on the passenger side of the cargo area, behind a small access door.

How to test a fuse

A blown fuse can be identified in two ways:

1. Visual Inspection: The simplest way is to pull the suspect fuse out of its slot. Hold it up to the light. Inside the plastic body of the fuse is a small metal strip. If this strip is broken or melted, the fuse is blown and needs to be replaced. If it's intact, the fuse is good.

2. Multimeter Test: For a more definitive test, you can use a multimeter set to the continuity setting (often indicated by a diode or sound wave symbol). Touch one probe to each metal spade on the top of the fuse. If the multimeter beeps or shows a reading of near-zero ohms, the fuse is good. If it remains silent or shows "OL" (Open Line), the fuse is blown.

When replacing a fuse, always use a new fuse with the exact same amperage rating. Using a higher-rated fuse can cause severe damage to the electrical system and create a fire hazard.

Common blown fuses on this vehicle

• Cigar Lighter / 12V Power Outlets (F46, F93, F43): These are the most common fuses to blow in any modern vehicle. They are often overloaded by phone chargers, dash cams, or tire inflators. If an outlet isn't working, this fuse is the first thing to check. Inspect the outlet itself for any foreign objects (like a coin) that could be causing a short circuit.

• Fuel Pump Fuse (F10): While less common, a blown fuel pump fuse will prevent the engine from starting. If the engine cranks but won’t fire up, check this fuse. If it's blown, replacing it might get you running again, but it could also indicate a failing fuel pump that is drawing too much current. If the replacement fuse blows as well, the fuel pump circuit needs to be diagnosed by a professional.

• Trailer Tow Fuses (F13, F14, F34): If you frequently tow, these fuses can blow due to faulty trailer wiring. Shorts in the trailer's lighting or brake system are the most common cause. If you blow a trailer tow fuse, the problem is most likely with the trailer, not the Jeep. Disconnect the trailer and see if the fuse still blows.

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