Ram 4500 (2018 – 2024) – fuse and relay box diagram

Ram 4500 (2018 – 2024) – fuse and relay box diagram

Year of production: 2018. 2019, 2020, 2021, 2022, 2023, 2024

 

The Ram 4500 Chassis Cab (2018-2024) is a heavy-duty truck designed for commercial use, offering a balance of power, durability, and versatility. Built for industries that require high towing, payload capacity, and customization options, the Ram 4500 is positioned between the lighter-duty Ram 3500 and the more robust Ram 5500. It’s commonly used for applications such as towing, construction, and utility services, where strength and adaptability are essential.

 

Engine  Compartment

Fuse Box Location

The Power Distribution Center is located in the engine compartment near the battery. This center contains cartridge fuses, micro fuses, relays, and circuit breakers. A description of each fuse and component may be stamped on the inside cover, otherwise the cavity number of each fuse is stamped on the inside cover.

Ram 4500 Chassis Cab (2018 - 2024) - fuse box location - engine compartment
Ram 4500 Chassis Cab (2018 – 2024) – fuse and relay box location – engine compartment

 

Fuse box diagram (Power Distribution Center)

Ram 4500 Chassis Cab (2018 - 2024) - fuse and relay box diagram - engine compartment
Ram 4500 Chassis Cab (2018 – 2024) – fuse and relay box diagram – engine compartment

 

Assignment of the fuses in the engine compartment

Cartridge Fuse Micro Fuse Description
F01 80A Black 2018-2018: Rad Fan Control Module – If Equipped (DS 1500 Only)
2019-2024: Spare
F02 60A Yellow 2018-2021: ABS Pump Motor (HD Only)
2022-2024: ABS Pump Mtr
F03 60A Yellow Rad Fan HI/Lo (if Equipped)
F04 50A Red 2019-2024: 400W Inverter
F05 40A Green / 50A Red Air Suspension Comp
F06 40A Green 2018: Antilock Brakes / Electronic Stability Control Pump
2019: ABS Pump Motor (DS 1500 Only)
2020-2024: Steering Torque Overlay Module (STOM)
F07 40A Green Starter Solenoid
F08 20A Blue 2018: Emissions Diesel – If Equipped
2019: NOX Sensor – If Equipped; Aux Relay Output – SSV Only
2020-2024: NOX Sensor (if Equipped)
F09 30A Pink / 40A Green 2018: Diesel Fuel Heater – If Equipped
2019: Aux Relay Output / Diesel Fuel Heater – If Equipped
2020-2024: Gas – Brake Vacuum Pump (if Equipped) / Diesel – Fuel Heater (if Equipped)
F10 40A Green / 50A Red Body Controller / Exterior Lighting #2
F11 30A Pink / 40A Green 2018: Integrated Trailer Brake Module – If Equipped
2019-2024: Brake System Module (ECU and Valves)
F12 40A Green Body Controller #3 / Power Locks
F13 40A Green HVAC Blower Motor
F14 40A Green Body Controller #4 / Exterior Lighting
F15 30A Pink 2019-2024: Power Side Step (if Equipped)
F16 30A Pink Smart-Bar Module (if Equipped)
F17 30A Pink 2019-2024: Winch Control Module – If Equipped
F18 Spare
F19 20A Blue / 30A Pink Diesel SCR Feed (if Equipped)
F20 30A Pink Passenger Door Mod
F21 30A Pink Drive Train Control Module
F22 20A Blue / 25A White / 30A Pink 2018: Engine Control Module
2019: Engine Control Module GPEC / Heavy Duty / Other – If Equipped
2020-2024: Gas – ECM (if Equipped) / Diesel – PCM (if Equipped)
F23 30A Pink Body Controller #1 / Interior Lighting
F24 30A Pink Driver Door Mod
F25 30A Pink Front Wiper
F26 30A Pink 2018-2019: Antilock Brakes / Stability Control Module / Valves – If Equipped
2020-2024: Spare
F27 Spare
F28 20A Blue Trailer Tow Backup Lights – If Equipped
F29 20A Blue Trailer Tow Parking Lights – If Equipped
F30 30A Pink 2018: Trailer Tow Receptacle
2019-2021: Trailer Tow Receptacle / Trailer Tow (Separate E-Brake) / Trailer Tow (BUX)
2022-2024: Trailer Tow
F31 30A Pink 2018: Urea Heater Control – If Equipped
2019: Diesel Heater Control – If Equipped (DS 1500 LD Diesel)
2020-2024: Spare
F32 Spare
F33 20A Blue 2018: Special Services Vehicle Only
2019-2024: Transmission Control Module (if Equipped)
F34 30A Pink Vehicle System Interface Module #2 (if Equipped)
F35 30A Pink Sunroof (if Equipped)
F36 30A Pink Rear Defroster (EBL) (if Equipped)
F37 30A Pink 2018: Cummins Diesel Fuel Heater #2 (If Equipped)
2019: Fuel Heater #2, Aux Relay 2 – If Equipped (HD Only); SSV (DS 1500 Only)
2020-2024: Diesel Frame / Fuel Heater (if Equipped)
F38 30A Pink 2018: Power Inverter 115V AC (If Equipped)
2019: Integrated Trailer Brake Module – If Equipped (HD Only); Power Inverter 115V AC – If Equipped (DS 1500 Only)
2020-2024: Integrated Trailer Brake Module (if Equipped)
F39 20A Blue 2018-2019: Power Outlet – Special Services Only
2020-2024: Spare
F40 10A Red 2019-2024: Ventilated Seats (if Equipped)
F41 10A Red 2018: Active Grille Shutter (If Equipped)
2019-2024: Active Grille Shutter / Active Air Dam (if Equipped)
F42 20A Yellow Horn
F43 15A Blue 2019-2024: Heated Steering Wheel (if Equipped)
F44 10A Red Diagnostic Port
F45 Spare
F46 10A Red Upfitters Relay Coils (if Equipped)
F47 Spare
F48 Spare
F49 10A Red / 15A Blue 2018: Instrument Panel Cluster (Except Fleet Vehicles)
2019: Instrument Panel Cluster / HVAC (DS 1500 Only); Instrument Cluster / MOD CSG (HD Only)
2020-2024: IP Cluster / CSG
F50 20A Yellow Air Suspension Control Module (if Equipped)
F51 10A Red 2018-2021: Ignition Node Module / Keyless Ignition Node Module, Radio Frequency Hub Module / Electric Steering Column Lock
2022-2024: Ignition Node Module / Keyless Ignition Node Module, Radio Frequency Hub Module
F52 5A Tan Battery Sensor
F53 20A Yellow Trailer Tow – Left Turn/Stop Lights
F54 20A Yellow Non Memory Adjustable Pedals (if Equipped)
F55 10A Red 2023-2024: Fwd Utility Lamps
F56 10A Red / 15A Blue 2018-2019: Additional Diesel Content (If Equipped)
2020-2024: Fuel Vapor Blocking Valve (VBV)
F57 20A Yellow TCM / PCM / Solenoid Trans Pressure SW
F58 10A Red 2019-2024: Bed Lighting (LED)
F59 Spare
F60 15A Blue 2018: Underhood Lamp
2019: Underhood Lamp / TCM – If Equipped (DS 1500 Only)
2020-2024: Spare
F61 10A Red 2018: PM Sensor (If Equipped)
2019: UREA Sensor / PM Sensor – If Equipped (DS 1500 LD Diesel & Cummins Diesel)
2020-2024: NH3 Sensor / PM Sensor (if Equipped)
F62 10A Red Air Conditioning Clutch
F63 20A Yellow 2018: Ignition Coils (Gas), Urea Heater (Cummins Diesel)
2019: Ignition Coils (Gas), Ignition Coils Capacitors (Gas) / Short Runner Valve Actuator / Urea Heater Control Unit (DS 1500 LD Diesel) / RLY Coil Feed-SCR (DS 1500 LD Diesel)
2020-2024: Ignition Coils / CAPS
F64 25A Clear Fuel Injectors / PCM (if Equipped)
F65 10A Red 2018: Spare
2019-2021: MOD Inverter (Wake Up) / Power Port / USB IP / WCPM – If Equipped (HD Only)
2022: Spare
2023-2024: RVDMP / MOD BLE (if Equipped)
F66 10A Red 2018: Sunroof / Passenger Window Switches / Rain Sensor
2019: Sunroof / Light and Rain Sensor Module / Inside Rearview Mirror / Passenger Window SW / USB Port Rear / Feed for R/A RLY #2 Coil (If Equipped)
2020-2021: Sunroof / USB Rear (If Equipped)
2022-2024: Sunroof / USB Rear / Inside Rearview Mirror/ Passenger Window SW
F67 10A Red 2018: CD / DVD / Bluetooth Hands-free Module (If Equipped)
2019: CD / DVD / UCI Port – If Equipped (HD Only); Bluetooth Hands-Free Module / CD – If Equipped (DS 1500 Only)
2020: CDM / UCI Port / USB Front
2021: UCI Port / USB Front
2022: UCI Port / USB Front / Trailer Gateway Module (360 Camera) / Tachograph
2023-2024: UCI Port / Trailer Gateway Module (360 Camera) / Tachograph
F68 10A Red 2019-2024: AEB RACAM HTR (if Equipped)
F69 15A Blue SCR Mod 12 Volt (if Equipped)
F70 30A Green 2018: Fuel Pump Motor
2019-2021: Fuel Pump Motor / K09 RLY Coil Feed (If Equipped)
2022-2024: Fuel Pump Mtr / Fuel Htr RLY
F71 25A Clear 2018: Amplifier
2019-2024: Amplifier / Active Noise Cancelation
F72 10A Red 2018: PCM (If Equipped)
2019: PCM / DC/DC Converter Voltage – If Equipped (DS 1500 Only)
2020-2024: Spare
F73 20A Yellow Fuel Transfer Pump (if Equipped)
F74 20A Yellow / 10A Red 2018-2019: Brake Vacuum Pump Gas/Diesel (If Equipped)
2020-2024: Backup Alarm
F75 10A Red 2018: Coolant Temperature Valve Actuator
2019: ATMM / Coil-SCR Module RLY – If Equipped (HD Only); Coolant Temperature Valve – If Equipped (DS 1500 Only)
2020-2024: ATMM / Coil-SCR Module RLY (if Equipped)
F76 10A Red 2018: Antilock Brakes / Electronic Stability Control
2019: Electronic Stability Control (HD Only); Brake System Module / Stop Lamp Switch / Electric Park Brake / Clutch Pedal Switch (DS 1500 Only)
2020-2024: Electronic Stability Control (ESC) (if Equipped)
F77 10A Red 2018: Drivetrain Control Module / Front Axle Disconnect Module
2019: Drivetrain Control Module / Front Axle Disconnect Module / TCM (HD Only); Drivetrain Control Module / ELSD / Front Axle Disconnect Module / Transmission Control Relay / RDM / Power Take Off Unit – If Equipped (DS 1500 Only)
2020-2024: Drivetrain Control Module / Front Axle Disconnect Module / TCM / STOM
F78 10A Red / 15A Blue 2018: Engine Control Module / Electric Power Steering
2019: Engine Control Module / Powertrain Control Module / AEB RACM MOD / Feed To AUX PDC Relay Coils (HD Only)
2020-2021: Engine Control Module / Powertrain Control Module / AEB RACM MOD / Feed To AUX PDC Relay Coils / HRLS
2022-2024: ECM / PCM / IRCM / AUX Relay Feed / HRLS
F79 15A Blue 2018: Clearance Lights
2019-2024: ID / Clearance Lt
F80 10A Red 2018: Universal Garage Door Opener / Compass
2019: Universal Garage Door Opener/Compass/Anti-Intrusion Module (DS 1500 Only); ASSY Overhead Console / SW Assist / SW 911 – If Equipped (HD Only)
2020-2024: Overhead Console / Assist / 911
F81 20A Yellow Trailer Tow Right Turn/Stop Lights
F82 10A Red Steering Column Control Module / Cruise Control
F83 10A Red 2023-2024: TLR AST / TLR RVS CTL / TLR KNB
F84 15A Blue 2018: Switch Bank / Instrument Cluster
2019-2024: ASBM / HVAC / ICS / Rear Heated Seat Switches
F85 10A Red ORC (Airbag)
F86 10A Red ORC (Airbag)
F87 10A Red 2018: Air Suspension – If Equipped / Trailer Tow / Steering Column Control Module
2019: Air Suspension / ITBM / Steering Column Control Module / MOD Gateway CAN-C Trailer TPM (HD Only); Air Suspension / Trailer Tow / DC/DC Converter (Voltage Stabilizer) / Steering Column Control Module / Occupant Classification Sensor (DS 1500 Only)
2020-2021: Air Suspension / ITBM / Steering Column Control Module / MOD Gateway CAN-C Trailer TPM
2022-2024: Air Susp / ITBM / SCCM / TLR TPM
F88 15A Blue Instrument Panel Cluster
F89 Spare
F90 20A Yellow Power Outlet / Batt (Customer Selectable)
F91 20A Yellow Power Outlet / Acc (Customer Selectable)
F92 10A Red 2023-2024: Invertor MOD / USB-IP / WCPM (if Equipped)
F93 20A Yellow 2018-2019: Cigar Lighter
F94 10A Red 2018: Shifter / Transfer Case Module
2019: Shift-By-Wire / Transfer Case Switch (DS 1500 Only); Shift-By-Wire/Transfer Case Switch / Module TPM Trailer (HD Only) / Module Gateway Can-C Trailer TPM (HD Only)
2020-2022: Shift-By-Wire / Transfer Case Switch / Module TPM Trailer / Module Gateway Can-C Trailer TPM
2023-2024: SBW / TCASE SW / TRL TPM – GTWY
F95 10A Red 2018: Rear Camera / Park Assist
2019: Rearview Camera / Park Assist / CHMSL Camera / Blind Spot Sensor / Surround View Camera (HD Only) Rear Camera / Park Assist/ Blind Spot Sensor / Compass (DS 1500 Only)
2020-2024: Rearview Camera / Park Assist / CHMSL Camera / Blind Spot Sensor / Surround View Camera
F96 10A Red 2018: Rear Seat Heater Switch
2019: Rear Seat Heater Switch / Trunk Lamp With Flashlamp Charger / Truck Lamp – If Equipped (DS 1500 Only); Trailer Camera – If Equipped (HD Only)
2020-2024: Trailer Camera (if Equipped)
F97 20A Yellow / 25A Clear 2018-2019: Rear Heated Seats & Heated Steering Wheel (If Equipped)
2020-2024: Front Heated Seat Passenger (if Equipped)
F98 20A Yellow / 25A Clear 2018-2019: Front Heated Seats (If Equipped)
2020-2024: Front Heated Seat Driver (if Equipped)
F99 10A Red 2018: Climate Control
2019: HVAC / DASM (DS 1500 Only); HVAC/ In-Car Temperature Sensor / CSG MOD / Humidity Sensor (HD Only)
2020-2021: HVAC / In-Car Temperature Sensor / CSG MOD
2022-2024: HVAC / In-Car Temperature Sensor / CSG MOD / Module Gateway Trailer / Tachograph
F100 10A Red Upfitter Box Feed (if Equipped)
F101 20A Yellow 2018: Electrochromatic Mirror / Smart High Beams (If Equipped)
2019: SSV Only
2020-2024: Rear Heated Seat Right (if Equipped)
F102 20A Yellow 2019-2024: Rear Heated Seat Left / Run RLY #3 Coil (if Equipped)
F103 10A Red HeadLamp AFLS (if Equipped)
F104 20A Yellow 2018: Power Outlets (Instrument Panel / Center Console)
2019: Power Outlets (Instrument Panel / Center Console) / Trunk – If Equipped (DS 1500 Only); UCI Port / USB Rear (HD Only)
2020-2024: UCI Port / USB Rear

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.