2023 Ram 2500 — Fuse Box Diagram & Amperage

Quick answer

• Engine compartment Power Distribution Center (PDC): Driver’s side of the bay, next to the battery. Houses most high-current fuses and key relays (starter, A/C clutch, trailer tow, ABS, fuel/lift pump).
• Left instrument panel fuse block: Behind the end cap on the driver’s side of the dash (visible when you open the driver’s door). Protects many interior/body circuits (radio, HVAC controls, outlets, airbags, cluster, lighting feeds).
• Battery-mounted high-amperage links (if equipped): Integrated fuse links/mega fuses at the positive battery terminal feeding the PDC and alternator. These are not serviceable micro fuses but are part of the power distribution.

Note: The Ram 2500 is a pickup with no trunk fuse panel. Trim, engine (6.4L HEMI vs. 6.7L Cummins), and upfitter options can change numbering and assignments. Always verify against the legend printed on your fuse box cover.

Engine compartment Power Distribution Center (PDC)

Location: Driver’s side of engine bay near the battery. Squeeze the two tabs and lift to remove the lid. The underside of the lid shows the exact layout for your truck.

Relays in this box (typical): Starter relay, A/C compressor clutch relay, Horn relay, Trailer Tow relays (as equipped), Grid heater relays (diesel), Defrost relays. Some lighting and fuel pump functions may be solid-state controlled by modules, not discrete relays, depending on trim.

Typical PDC fuses and relays for common circuits (verify on lid; numbers may vary):

Notes:

• Diesel-equipped trucks use multiple high-current relays and fuses for grid heaters; these may occupy the upper rows in the PDC and will differ from gasoline trucks.
• Headlamp functions are typically solid-state switched by the BCM; individual "left/right" headlamp fuses may not be present on all trims.
• Verify exact fuse numbers and positions using your lid legend; the list above reflects common 2023 Ram 2500 layouts.

Left instrument panel fuse block (driver’s side dash)

Location: Open the driver’s door and pry off the small end cap on the side of the dash to expose the fuse panel. Use the white plastic puller (often clipped inside) to remove mini fuses.

Relays in this box: Most 2023 Ram 2500 trims have few/no serviceable relays here; body functions are controlled by the Body Control Module (BCM). Some upfit packages may add micro relays.

Typical interior fuses for common circuits (verify on lid; numbers may vary):

Notes:

• Power outlets may be split across the PDC and the interior block depending on trim and whether the outlet is ignition-switched or battery-hot.
• Trucks with the factory trailer brake controller also draw logic power here, but the high-current feed for the trailer brakes is in the PDC.

Battery-mounted high-amperage links (if equipped)

Location: Positive battery terminal assembly.

These protect the main feeds to the PDC, alternator, and other high-current consumers. They are typically labeled on the battery terminal cover and are not the same as the serviceable mini/micro fuses.

How to test a fuse

• Visual check: Remove the fuse and look through the translucent body. A broken or melted element indicates a blown fuse. This can miss hairline cracks, so confirm electrically.
• Test light method: With the circuit powered, probe both test tabs on top of the fuse. The light should illuminate on both sides. If it lights on only one side, the fuse is blown.
• Multimeter method: With power off, measure continuity across the fuse terminals. 0–1 ohm indicates good; OL/infinite indicates blown. Or, with power on, check for 12V on both tabs.
• After replacement: If a new fuse blows immediately, stop. You likely have a shorted component or pinched harness; continued upsizing fuses can cause wiring damage.

Common blown fuses on this vehicle (what to check first)

• 12V power outlets/cigar lighter: Coins or metal debris in the socket commonly short these. Inspect the socket before replacing the 20A yellow fuse (often in the interior block) and verify if the outlet is ignition or battery-fed.
• Trailer tow lighting: Corrosion or a crushed 7‑way connector will pop the 20A yellow LT/RT turn/stop fuses in the PDC. Unplug the trailer and retest; if the fuse holds with no trailer, service the trailer wiring.
• Trailer brake controller power: If the 30A green PDC fuse opens, look for chafed blue brake feed wire at the hitch or aftermarket splices.
• Headlamps/park lamps: If equipped with separate fusing, a blown 10–15A fuse usually points to a bulb or socket short. Many 2023 trucks use BCM solid-state drivers—scan for BCM faults if fuses keep blowing.
• Fuel pump (gas engines): A repeatedly blown 20A yellow pump fuse suggests a failing in-tank pump or rubbed harness above the tank. Current ramp testing can confirm.
• ABS pump: A 40A orange pump fuse that opens indicates a seized pump or shorted harness. Pull ABS pump connector and recheck before condemning the module.
• HVAC blower: If the 30A green blower fuse blows, inspect for debris in the blower cage and check the blower motor for excessive current draw.

Always match the replacement fuse’s amperage and type. Layouts vary by engine and options—confirm your exact fuse number and location using the printed legend in your fuse box lid and your owner’s manual.

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