2019 Ram ProMaster Fuse Box Diagram & Amperages

As an ASE-certified master technician, I know that dealing with electrical issues on a commercial van like the 2019 Ram ProMaster can be a major headache. Whether you are driving the 1500, 2500, or 3500 model, an electrical gremlin can put your work on hold. Before you start tearing into wiring harnesses or replacing expensive modules, your first stop should always be the fuse boxes.

Below is a comprehensive guide to the fuse box locations, amperage ratings, and circuit diagrams for the 2019 Ram ProMaster.

Disclaimer: Fuse configurations can vary based on trim level, engine, and upfitter options (like auxiliary switches or trailer tow packages). Always verify with the printed legend on the inside of your fuse box lid.

Quick answer

The 2019 Ram ProMaster is equipped with three primary fuse box locations:

1. Under-hood Power Distribution Center (PDC): Located in the engine compartment on the passenger side, near the firewall.
2. Dashboard Fuse Panel: Located on the driver’s side of the dashboard, behind a plastic cover cover below and to the left of the steering wheel.
3. Right B-Pillar Fuse Panel (Upfitter/Auxiliary): Located behind a trim panel on the passenger side B-pillar, often used for upfitter additions and auxiliary functions.

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Under-Hood Power Distribution Center (PDC)

The under-hood fuse box contains high-amp maxi fuses, relays, and mini fuses for critical engine and powertrain components such as the ECM, fuel pump, ABS, and headlights.

Fuse #	Amp	Color	Circuit / Component Protected
F01	40A	Orange	Anti-Lock Brake System (ABS) Pump
F02	20A	Yellow	ABS Valves
F03	30A	Green	Ignition Switch / Body Control Module (BCM)
F04	50A	Red	Blower Motor Relay / Climate Control
F06	40A	Orange	Radiator Cooling Fan - Low Speed
F07	50A	Red	Radiator Cooling Fan - High Speed
F08	40A	Orange	Blower Motor (Secondary)
F09	30A	Green	Starter Relay / Solenoid
F10	15A	Blue	Horn Relay
F11	10A	Red	Powertrain Control Module (PCM) / Engine Sensors
F14	15A	Blue	A/C Compressor Clutch
F15	15A	Blue	Headlight - Left High/Low Beam
F16	15A	Blue	Headlight - Right High/Low Beam
F17	10A	Red	Engine Control Module (ECM) Primary
F20	30A	Green	Windshield Wiper Motor
F21	15A	Blue	Fuel Pump Relay / Fuel Pump
F24	10A	Red	Power Steering Module
F30	20A	Yellow	Fog Lights

Note on Relays: The under-hood PDC also houses several main relays, including the Starter Relay, Fuel Pump Relay, A/C Clutch Relay, and Radiator Fan Relays. If a high-draw component like the starter or A/C fails to engage, and the fuse is good, test or swap the corresponding relay.

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Dashboard Fuse Panel (Driver's Side)

The interior fuse panel protects cabin-specific circuits such as the radio, airbags, interior lighting, and 12V power outlets. To access it, remove the plastic cover on the lower left side of the dashboard.

Fuse #	Amp	Color	Circuit / Component Protected
F12	10A	Red	Right Low Beam Headlight (Secondary circuit)
F13	10A	Red	Left Low Beam Headlight (Secondary circuit)
F31	5A	Tan	Airbag Module / Occupant Classification
F32	10A	Red	Interior Lighting / Dome Lights
F36	15A	Blue	Radio / Infotainment System / Uconnect
F37	10A	Red	Brake Light Switch / Stop Lamps
F38	20A	Yellow	Central Locking System / Power Locks
F42	5A	Tan	Instrument Cluster / Diagnostic Link Connector (OBD2)
F43	20A	Yellow	Windshield Washer Pump
F44	20A	Yellow	Cigar Lighter / 12V Front Power Outlet
F48	20A	Yellow	Passenger Power Window
F49	20A	Yellow	Driver Power Window
F50	7.5A	Brown	Airbag System (Secondary)
F51	5A	Tan	Backup Lights / Reverse Lamps
F53	10A	Red	Turn Signals / Hazard Flashers
F94	15A	Blue	Rear 12V Cargo Power Outlet

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Right B-Pillar Auxiliary Panel (Upfitter)

For ProMasters heavily configured for work or RV conversion, there is often a secondary panel on the passenger side B-pillar. This primarily handles optional towing equipment and upfitter switches.

Fuse #	Amp	Color	Circuit / Component Protected
F81	20A	Yellow	Upfitter / Auxiliary Power 1
F82	20A	Yellow	Upfitter / Auxiliary Power 2
F83	20A	Yellow	Trailer Tail / Park Lights
F84	15A	Blue	Trailer Brake Controller (if equipped)
F85	15A	Blue	Trailer Right Turn / Stop Light
F86	15A	Blue	Trailer Left Turn / Stop Light

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How to test a fuse

When an electrical accessory in your ProMaster goes dark, don't just guess which fuse is blown. Follow these steps to properly test a fuse:

1. Visual Inspection: Pull the suspect fuse using fuse pullers or needle-nose pliers. Look at the U-shaped metal filament inside the plastic housing. If the filament is broken or the plastic is scorched, the fuse is blown and needs replacement.
2. Using a Test Light: Ground the clamp of your 12V test light to a solid bare metal point on the chassis. Turn the ignition on. Touch the tip of the test light to the two small exposed metal test points on the top of the fuse. If the light illuminates on one side but not the other, the fuse is blown.
3. Using a Multimeter: Set your digital multimeter to the continuity setting (the one that beeps) or the lowest Ohms (resistance) setting. Touch the probes to the test points on top of the fuse. If you hear a beep or see a reading near 0.0 ohms, the fuse is good. If the meter reads "OL" (Open Loop), the fuse is blown.

Important: Always replace a blown fuse with one of the exact same amperage and color. Using a higher amperage fuse can overheat the wiring and cause an electrical fire.

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Common blown fuses on this vehicle

As a commercial vehicle, the 2019 Ram ProMaster gets put through its paces. Here are the most common electrical faults we see in the shop:

• Cigar Lighter / 12V Outlets (Fuse F44 / F94): Delivery drivers and contractors constantly plug in phone chargers, GPS units, and small inverters. If an accessory shorts out, or draws too much power, F44 will pop immediately. Check your charger for debris before replacing the fuse.
• Trailer Tow Lighting (F85 / F86): When pulling heavily used or poorly maintained utility trailers, shorts in the trailer wiring are incredibly common. If your van’s turn signals blink rapidly when a trailer is attached, check these B-pillar fuses first.
• Blower Motor (Fuse F04 / F08): If the cabin HVAC blower stops working, it could be a blown fuse. However, a repeatedly blowing blower motor fuse usually points to a failing blower motor drawing too much amperage, or a burned-up blower motor resistor.

If you find yourself constantly replacing the same fuse, you have a hard short to ground in that circuit that needs to be diagnosed properly. Don't risk melting your wiring harness!

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