2024 Ram 3500 Fuse Box Diagram & Amperage

Quick Answer

Your 2024 Ram 3500 is equipped with several fuse boxes to protect its electrical systems. You'll find the primary fuse box, known as the Power Distribution Center (PDC), located under the hood. Inside the cabin, there's an Integrated Central Junction Box (ICJB) typically found on the passenger-side kick panel. Depending on your trim and options, there may also be an auxiliary fuse panel in the cabin or cargo area for specific accessories or upfitter circuits. Always consult your owner's manual and the fuse box lid for the most accurate and up-to-date information for your specific vehicle configuration.

Under-hood Power Distribution Center (PDC)

The PDC is located under the hood, typically on the driver's side near the battery. It houses many of the fuses and relays for critical engine functions, lights, and heavy-duty accessories.

Relays in the PDC (Common Locations):

• R01: Starter Relay
• R02: Fuel Pump Relay
• R03: ABS Pump Relay
• R04: Run/Start Relay
• R05: Blower Motor Relay
• R06: A/C Clutch Relay
• R07: Headlight High Beam Relay
• R08: Headlight Low Beam Relay

Note: Relay locations can vary slightly. Always refer to your fuse box lid diagram.

Integrated Central Junction Box (ICJB) - Passenger Kick Panel

The ICJB is located on the passenger side of the cabin, behind the kick panel. This fuse box primarily handles interior electrical components, infotainment, power accessories, and some lighting.

Note: Exact fuse assignments can vary by trim level and optional equipment. Always consult the diagram printed on the fuse box cover.

Auxiliary Fuse Panel (Cab/Cargo Area - If Equipped)

Some 2024 Ram 3500 models, particularly those with upfitter switches or special packages, may have an additional auxiliary fuse panel. The location can vary but is often found in the driver's side kick panel area, behind the rear seat, or in the cargo area. This panel typically includes fuses for specialized accessories or customer-added equipment. Consult your owner's manual for the exact location and detailed diagram of this panel if present in your vehicle.

How to Test a Fuse

Testing a fuse is a straightforward process. You will need a fuse puller (usually found in one of the fuse boxes) and a multimeter or a fuse tester tool.

1. Safety First: Ensure the vehicle is off and the ignition key is removed. If working in the under-hood fuse box, disconnect the negative battery terminal for maximum safety.
2. Locate the Fuse: Identify the suspect fuse using the diagrams provided on the fuse box lid or in your owner's manual.
3. Remove the Fuse: Use the fuse puller to carefully remove the fuse. Never use metal tools that could damage the fuse or cause a short.
4. Visual Inspection: Hold the fuse up to the light. If the metal wire or filament inside is broken or melted, the fuse is blown and needs replacement.
5. Test with a Multimeter: If the visual inspection is inconclusive, set your multimeter to the continuity setting (often indicated by an audible beep or an ohm symbol). Touch the probes to the two metal terminals on top of the fuse. A good fuse will show continuity (a reading close to zero ohms or an audible beep), while a blown fuse will show no continuity ("OL" or no beep).
6. Replace the Fuse: If the fuse is blown, replace it with a new fuse of the exact same amperage and type. Using a higher amperage fuse can lead to severe electrical damage or even fire.

Common Blown Fuses on This Vehicle

While fuses can blow for various reasons, some circuits are more prone to issues due to heavy usage or potential aftermarket additions.

• Cigar Lighter / Power Outlets (M01, M15): These fuses often blow due to overloading with multiple devices, faulty accessories, or short circuits in charging cables. Always check these first if your phone charger or accessory isn't working.
• Trailer Tow Connector (F03, F15): Problems with trailer wiring, short circuits in the trailer itself, or overloading can cause these fuses to blow. If your trailer lights or brakes aren't working, check these fuses.
• Blower Motor (F02, M03): A failing blower motor, a clogged cabin air filter putting strain on the motor, or issues with the blower motor resistor can lead to this fuse blowing. If your fan isn't working on any speed, start here.
• Radio/Infotainment (M02): While less common, aftermarket stereo installations or issues with connected devices can sometimes cause this fuse to blow if your radio goes completely dead.
• Headlights (F07, F08, F09, F10): A short in a bulb or wiring, although rare in modern systems, can sometimes lead to a headlight fuse blowing. If one or both headlights are out, check these.

Before replacing a blown fuse, try to identify the cause. Replacing a fuse without addressing the underlying issue will likely result in the new fuse blowing again.

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