2023 Ram 3500 Fuse Box Diagram & Amperage
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Quick answer
The 2023 Ram 3500 has two primary fuse box locations:
- Under-Hood Power Distribution Center (PDC): Located in the engine bay, on the driver's side, near the battery.
- Interior Fuse Box: Located under the driver's side of the dashboard, near the parking brake pedal. You may need to remove a trim panel to access it.
Under-Hood Power Distribution Center
This is the main fuse box and contains high-amperage fuses and relays for the entire vehicle. Always disconnect the battery before servicing high-amperage fuses. The layout can vary slightly based on your truck's specific options (e.g., diesel vs. gas, trailer tow packages). Always verify the fuse locations and ratings by checking the diagram printed on the underside of your fuse box lid.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F01 | 40A | Green | Anti-Lock Brakes (ABS) Pump |
| F03 | 40A | Green | Blower Motor (Front) |
| F05 | 30A | Pink | Starter Solenoid |
| F06 | 25A | Natural | Windshield Wiper Motor |
| F10 | 20A | Yellow | Fuel Pump Motor |
| F14 | 20A | Yellow | Ignition Coils (Gas) / Fuel Injectors (Diesel) |
| F20 | 15A | Blue | Left High-Beam Headlamp |
| F21 | 15A | Blue | Right High-Beam Headlamp |
| F22 | 10A | Red | A/C Compressor Clutch |
| F24 | 30A | Pink | Trailer Tow Connector (30-Amp) |
| F25 | 25A | Natural | Airbag Control Module |
| F28 | 20A | Yellow | Horn |
| F30 | 25A | Natural | Engine Control Module (ECM) / Powertrain Control Module (PCM) |
| F31 | 15A | Blue | Left Low-Beam Headlamp |
| F32 | 15A | Blue | Right Low-Beam Headlamp |
| F34 | 20A | Yellow | Trailer Tow Park Lamps |
| F38 | 25A | Natural | Infotainment/Radio System |
| F42 | 20A | Yellow | 12V Power Outlet / Cigarette Lighter (Instrument Panel) |
| F43 | 20A | Yellow | 12V Power Outlet (Center Console) |
| F61 | 30A | Pink | Trailer Brake Controller |
| F70 | 10A | Red | Brake Lamps / Stop Lamps |
| F71 | 15A | Blue | Park/Tail Lamps |
Common Relays in this Location:
- Starter Motor Relay
- Fuel Pump Relay
- A/C Clutch Relay
- Blower Motor Relay
- Headlamp Relays
Interior Fuse Box
This fuse box handles most of the interior circuits, including lighting, accessories, and various control modules. It is located under the driver's side dashboard.
| Fuse # | Amp | Color | Circuit / Component Protected |
|---|---|---|---|
| F10 | 10A | Red | Gauge Cluster / Instrument Panel |
| F12 | 15A | Blue | OBD-II Diagnostic Port Power |
| F17 | 10A | Red | Airbag System (Occupant Restraint Controller) |
| F23 | 10A | Red | Steering Wheel Controls |
| F30 | 15A | Blue | USB Ports |
| F32 | 10A | Red | Ignition Switch |
| F35 | 15A | Blue | Radio / Infotainment Display |
| F48 | 10A | Red | Interior Cabin Lighting |
| F50 | 20A | Yellow | Heated Seats |
How to test a fuse
A blown fuse is a common and usually easy-to-fix problem. Here’s how to check one:
- Turn Off the Vehicle: Make sure the ignition is off and the key is removed.
- Locate the Fuse: Find the suspect fuse using the diagram on the fuse box lid or in this guide.
- Remove the Fuse: Use the plastic fuse puller tool often found inside the fuse box. If you don't have one, a pair of needle-nose pliers will work carefully.
- Inspect the Fuse: Hold the fuse up to the light. Inside the plastic body is a small metal strip. If this strip is broken or melted, the fuse is blown.
- Replace if Necessary: If the fuse is blown, replace it with a new fuse of the exact same amperage rating. Using a higher-rated fuse can cause a fire. The amp rating is printed on top of the fuse and is also indicated by its color.
Common blown fuses on this vehicle
- 12V Power Outlet / Cigarette Lighter (F42 Under-Hood): This is one of the most common fuses to blow. It often happens when a faulty phone charger, air compressor, or other plug-in accessory is used. If this fuse blows, the first thing to check is the device you last plugged into it.
- Trailer Tow Fuses (F24, F34, F61 Under-Hood): Issues with trailer wiring are a frequent cause of blown fuses. A short in the trailer's wiring for its lights or brakes will blow the corresponding fuse in the truck. If a trailer light fuse blows instantly upon connection, inspect the trailer's plug and wiring harness for damage or corrosion.
- Fuel Pump Fuse (F10 Under-Hood): While less common, a failing fuel pump can draw too much current and blow its fuse. If your truck cranks but won't start, checking this fuse is a good first step. If the fuse is blown and the replacement also blows, it may indicate a problem with the fuel pump or the wiring to it.
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Before you pull a fuse on the 2023 Ram 3500
- 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 2023 Ram 3500
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
Maintenance & repair guides
2023 Ram 3500 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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Values can vary by engine, trim and build date; check your VIN-specific service information. Updated 2026-09-04.