2024 Ford Ranger Fuse Box Diagram & Amperage

Quick Answer

The 2024 Ford Ranger features three main fuse box locations:

• Under-hood Fuse Box: Located in the engine compartment, typically near the battery on the driver's side.
• Passenger Compartment Fuse Box: Found behind the kick panel on the passenger side of the cabin.
• Rear Load Compartment Fuse Box: Situated in the cargo area, often behind a panel on the driver's side.

Under-hood Fuse Box (Battery Junction Box - BJB)

This fuse box is the primary power distribution point for many critical systems, including the engine, lighting, and major electrical components. It houses both standard fuses and larger cartridge fuses, as well as multiple relays.

To access it, ensure the vehicle is off and the key is removed from the ignition. Open the hood and locate the black plastic box, usually on the driver's side near the battery. Press the release tabs and lift the cover to expose the fuses and relays. Always refer to the diagram on the inside of the fuse box lid for the most accurate information for your specific trim level.

Common Relays in this box include:

• R1: PCM Relay
• R2: Fuel Pump Relay
• R3: Starter Relay
• R4: Cooling Fan Relay
• R5: A/C Clutch Relay

Passenger Compartment Fuse Box (Smart Junction Box - SJB)

The passenger compartment fuse box, also known as the Smart Junction Box (SJB), is responsible for protecting many of the interior electrical components. It is located behind the kick panel on the passenger side of the vehicle, typically requiring removal of a trim panel to access. Always consult your owner's manual for exact instructions on accessing this fuse box.

Rear Load Compartment Fuse Box

The rear load compartment fuse box typically handles power distribution for rear accessories, trailer wiring, and certain power outlets in the cargo area. This fuse box is usually located behind a removable access panel in the cargo area, often on the driver's side. Refer to your vehicle's owner's manual for the precise location and access procedure.

How to Test a Fuse

Testing a fuse is a straightforward process that can help you diagnose electrical issues. You will need a fuse puller (often found in the fuse box lid) and a multimeter or a fuse tester.

1. Safety First: Ensure the vehicle is off and the ignition key is removed. If working on an engine compartment fuse box, disconnect the negative battery terminal for added safety.
2. Locate the Fuse: Identify the suspected fuse using the fuse box diagram. Use the fuse puller to carefully remove the fuse.
3. Visual Inspection: Hold the fuse up to a light. If the metal wire or filament inside is broken or burnt, the fuse is blown and needs replacement.
4. Multimeter Test (for non-visible fuses or verification):
   • Set your multimeter to the continuity setting (looks like a sound wave or diode symbol). If your multimeter doesn't have continuity, set it to measure ohms (Ω).
   • Touch the probes of the multimeter to the two metal test points on top of the fuse (or the metal blades if testing directly). A good fuse will show a reading of zero or close to zero ohms (continuity). If there is no continuity or an "OL" (open loop) reading, the fuse is blown.
5. Fuse Tester: A dedicated fuse tester will light up if the fuse is good. Simply touch the tester probes to the fuse's test points.
6. Replace: If the fuse is blown, replace it with a new fuse of the exact same amperage and type. Never use a fuse with a higher amperage rating, as this can cause severe damage to your electrical system or even a fire.

Common Blown Fuses on this Vehicle

While any fuse can blow, some are more commonly affected due to the nature of the circuits they protect or because they are frequently used. On a 2024 Ford Ranger, you might commonly encounter issues with fuses related to:

• Cigar Lighter/12V Power Outlets (F21 Front, F40 Rear): These fuses often blow due to overloads from charging multiple devices, using high-power accessories, or inserting foreign objects into the outlet.
  • What to check first: Disconnect all devices from the auxiliary power outlets. Check the outlets for any foreign objects. If the fuse blows again immediately after replacement, there might be a short circuit in the wiring or the outlet itself.
• Headlights (F5, F6 High Beam; F7, F8 Low Beam) or Tail Lights (F22): Blown fuses in these circuits often result in one or more lights not working. While sometimes a bulb can be the culprit, a fuse protects the entire circuit.
  • What to check first: Inspect the specific bulb associated with the non-working light. If the bulb appears good, then check the fuse. If the fuse blows repeatedly, there could be a short in the headlight wiring or assembly.
• Radio/Infotainment (F20): If your radio, touchscreen, or other infotainment features suddenly stop working, a blown fuse is a common cause.
  • What to check first: If the radio goes completely dark, check this fuse. If only certain functions are not working, it might be an internal radio issue rather than a fuse.
• Blower Motor (F14 - Under-hood): If your climate control fan stops working entirely, a blown fuse or a faulty blower motor resistor is a likely cause.
  • What to check first: If the fan doesn't work on any speed, start by checking the fuse. If it only works on certain speeds, the blower motor resistor is more likely the issue.

Remember that while these are common issues, always consult your owner's manual for specific troubleshooting steps and fuse box diagrams pertaining to your exact 2024 Ford Ranger trim level.

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