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| 2021 RAM 1500 |
Fuses and Relays
WARNING
- When replacing a blown fuse, always use an appropriate replacement fuse with the same amp rating as the original fuse. Never replace a fuse with another fuse of higher amp rating. Never replace a blown fuse with metal wires or any other material. Do not place a fuse inside a circuit breaker cavity or vice versa. Failure to use proper fuses may result in serious personal injury, fire and/or property damage.
- Before replacing a fuse, make sure that the ignition is off and that all the other services
are switched off and/or disengaged.
- Before replacing a fuse, make sure that the ignition is off and that all the other services
are switched off and/or disengaged.
- If the replaced fuse blows again, contact an authorized dealer.
- If a general protection fuse for safety systems (air bag system, braking system), power unit systems (engine system, transmission system) or steering system blows, contact an authorized dealer.
CAUTION
If it is necessary to wash the engine compartment, take care not to directly hit the fuse box, and the windshield wiper motors with water.
- If a general protection fuse for safety systems (air bag system, braking system), power unit systems (engine system, transmission system) or steering system blows, contact an authorized dealer.
CAUTION
If it is necessary to wash the engine compartment, take care not to directly hit the fuse box, and the windshield wiper motors with water.
The fuses protect electrical systems against excessive current.
When a device does not work, you must check the fuse element inside the blade fuse for a break/melt.
Also, please be aware that when using power outlets for extended periods of time with the
engine off may result in vehicle battery discharge.
External Power Distribution Center
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 that corresponds to the following chart.
 |
| Power Distribution Center |
Cavity .. Cartridge Fuse .. Micro Fuse .. Description
F01 – 25 Amp Clear Fuel Pump Motor
F02 - Spare
F03 – 5 Amp Tan MGU
F04 – – Spare
F05 – – Spare
F06 – - Spare (2021 Model - 10 Amp Red OUTPUT TO UPFITTER PDC — If Equipped)
F07 – – Spare
F08 20 Amp Blue – Trailer Tow Backup
F09 – 20 Amp Yellow Trailer Stop / Turn Lamp Left
F10 – 20 Amp Yellow Trailer Stop / Turn Lamp Right
F11 – 15 Amp Blue ID/CLEARANCE LIGHTS — If Equipped
F12 20 Amp Blue – Trailer Tow Park Lamp
F13 – – Spare
F14 – 10 Amp Red AC Clutch
F15 – 5 Amp Tan Intelligent Battery Sensor (IBS)
F16 – – Spare
F17 – 20 Amp Yellow Air Suspension
F18 – 15 Amp Blue AGS / Rear Axle Cooling Valve / Active Air Dam
F19 – – Spare
F20 – 20 Amp Yellow Adjustable Pedals
F21 30 Amp Pink – Power Side Step
F22 50 Amp Red – Air Module
F23 – – Spare
F24 – 20 Amp Yellow TCM SBW
F25 40 Amp Green – Exterior Lights 2
F26 50 Amp Red – ESP Module
F27 30 Amp Pink – Front Wiper
F28 – 10 Amp Red PCM / ECM
F29 40 Amp Green – ESP Module
F30 – – Spare
F31 – – Spare
F32 20 Amp Blue – ECM / PCM
F33 30 Amp Pink – Brake Vacuum Pump
F34 – – Spare
F35 – 10 Amp Red PCM / ECM / Power Pack Unit (PPU) Motor Generator Unit (MGU) Wake Up / EPS / Active Tuned Mass Module (ATMM) / ESP
F36 – – Spare
F37 – 5 Amp Tan R / S Output to iPDC
F38 – 10 Amp Red DTCM / Active CL TEMP VLV
F39 – 15 Amp Red MOD ATMM
F40 40 Amp Green – Starter
F41 – 10 Amp Red IRCAM Heaters
F42 20 Amp Blue – AUX SWITCH #5 — If Equipped
F43 – 20 Amp Yellow MGU Coolant Pump
F44 – 10 Amp Red Trailer Camera
F45 – 10 Amp Red ADCM — If Equipped
F46 30 Amp Pink – Fuel Heater
F47 30 Amp Pink – Rear Defroster
F48 – – Spare
F49 30 Amp Pink – Htr Ctrl (Diesel Only)
F50 20 Amp Blue – AUX SWITCH #6 — If Equipped
F51 25 Amp White – FUEL PUMP MOTOR #1 — If Equipped
F52 – – Spare
F53 – 10 Amp Red Supply / Purging Pump – If Equipped
F54 – 15 Amp Blue PCM
F55 – 15 Amp Blue Right HID Headlamp
F56 – – Spare
F57 – 20 Amp Yellow Horn
F58 25 Amp White – FUEL PUMP MOTOR #2 — If Equipped
F59 – 25 Amp Clear Injectors / IGN Coil / Glow Plug Module
F60 – 20 Amp Yellow ECM / PCM / ACT Short Running Valve
F61 – 15 Amp Blue Left HID Headlamp / Spare
F62 60 Amp Blue / 40 Amp Green – Glow Plug (DSL) / LTR Coolant Pump (TRX)
F63 20 Amp Blue – NOx Sensor
F64 – 10 Amp Red PM Sensor – If Equipped
CAUTION
- When installing the power distribution center cover, it is important to ensure the cover is properly positioned and fully latched. Failure to do so may allow water to get into the power distribution center and possibly result in an electrical system failure.
F03 – 5 Amp Tan MGU
F04 – – Spare
F05 – – Spare
F06 – - Spare (2021 Model - 10 Amp Red OUTPUT TO UPFITTER PDC — If Equipped)
F07 – – Spare
F08 20 Amp Blue – Trailer Tow Backup
F09 – 20 Amp Yellow Trailer Stop / Turn Lamp Left
F10 – 20 Amp Yellow Trailer Stop / Turn Lamp Right
F11 – 15 Amp Blue ID/CLEARANCE LIGHTS — If Equipped
F12 20 Amp Blue – Trailer Tow Park Lamp
F13 – – Spare
F14 – 10 Amp Red AC Clutch
F15 – 5 Amp Tan Intelligent Battery Sensor (IBS)
F16 – – Spare
F17 – 20 Amp Yellow Air Suspension
F18 – 15 Amp Blue AGS / Rear Axle Cooling Valve / Active Air Dam
F19 – – Spare
F20 – 20 Amp Yellow Adjustable Pedals
F21 30 Amp Pink – Power Side Step
F22 50 Amp Red – Air Module
F23 – – Spare
F24 – 20 Amp Yellow TCM SBW
F25 40 Amp Green – Exterior Lights 2
F26 50 Amp Red – ESP Module
F27 30 Amp Pink – Front Wiper
F28 – 10 Amp Red PCM / ECM
F29 40 Amp Green – ESP Module
F30 – – Spare
F31 – – Spare
F32 20 Amp Blue – ECM / PCM
F33 30 Amp Pink – Brake Vacuum Pump
F34 – – Spare
F35 – 10 Amp Red PCM / ECM / Power Pack Unit (PPU) Motor Generator Unit (MGU) Wake Up / EPS / Active Tuned Mass Module (ATMM) / ESP
F36 – – Spare
F37 – 5 Amp Tan R / S Output to iPDC
F38 – 10 Amp Red DTCM / Active CL TEMP VLV
F39 – 15 Amp Red MOD ATMM
F40 40 Amp Green – Starter
F41 – 10 Amp Red IRCAM Heaters
F42 20 Amp Blue – AUX SWITCH #5 — If Equipped
F43 – 20 Amp Yellow MGU Coolant Pump
F44 – 10 Amp Red Trailer Camera
F45 – 10 Amp Red ADCM — If Equipped
F46 30 Amp Pink – Fuel Heater
F47 30 Amp Pink – Rear Defroster
F48 – – Spare
F49 30 Amp Pink – Htr Ctrl (Diesel Only)
F50 20 Amp Blue – AUX SWITCH #6 — If Equipped
F51 25 Amp White – FUEL PUMP MOTOR #1 — If Equipped
F52 – – Spare
F53 – 10 Amp Red Supply / Purging Pump – If Equipped
F54 – 15 Amp Blue PCM
F55 – 15 Amp Blue Right HID Headlamp
F56 – – Spare
F57 – 20 Amp Yellow Horn
F58 25 Amp White – FUEL PUMP MOTOR #2 — If Equipped
F59 – 25 Amp Clear Injectors / IGN Coil / Glow Plug Module
F60 – 20 Amp Yellow ECM / PCM / ACT Short Running Valve
F61 – 15 Amp Blue Left HID Headlamp / Spare
F62 60 Amp Blue / 40 Amp Green – Glow Plug (DSL) / LTR Coolant Pump (TRX)
F63 20 Amp Blue – NOx Sensor
F64 – 10 Amp Red PM Sensor – If Equipped
CAUTION
- When installing the power distribution center cover, it is important to ensure the cover is properly positioned and fully latched. Failure to do so may allow water to get into the power distribution center and possibly result in an electrical system failure.
- When replacing a blown fuse, it is important to use only a fuse having the correct amperage rating. The use of a fuse with a rating other than indicated may result in a dangerous electrical system overload. If a properly rated fuse continues to blow, it indicates a problem in the circuit that must be corrected.
Internal Power Distribution Center
The Power Distribution Center is located under the drivers side instrument panel. 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 that corresponds to the following chart.
Cavity .. Cartridge Fuse .. Micro Fuse ... Description
F01 30 Amp Pink – Trailer Tow Receptacle
F03 – 20 Amp Yellow Module Seat Heater Front (Pass)
F04 – – Spare
F05 – 20 Amp Yellow Module PPU Cooling Fan
F06 – – Spare
F07 40 Amp Green – Mod CBC 3 PWR Locks
F08 – – Spare
F09 – – Spare
F10 40 Amp Green – HVAC Blower Motor
F11 – 5 Amp Tan Output to Under-hood Power Distribution Center (UPDC) Run Coil
F12 – 25 Amp Clear Mod Audio Amplifier / Active Noise Cancellation / SW Inverter
F13 – 20 Amp Yellow Mod Seat Heater Front (Driver)
F14 – 15 Amp Blue Mod Seat Heater Front (Steering Wheel)
F15 – – Spare
F16 – – Spare
F17 – 20 Amp Yellow LT Spot Lamp — If Equipped
F18 30 Amp Pink – Motor Sunshade Sunroof
F19 – – Spare
F20 – 20 Amp Yellow Comfort Rear Seat Module (CRSM) (Heat Rear RT)
F21 – – Spare
F22 – – Spare
F23 – – Spare
F24 – 15 Amp Blue Mod RF Hub / Mod Ignition / Mod Cluster
F25 40 Amp Green – Mod Integrated Trailer Brake
F26 – 15 Amp Blue Mod Cluster CCN / Mod Cyber Security
F27 – 5 Amp Tan Mod Cluster CCN / Mod SGW
F28 – 10 Amp Red Mod ORC
F29 – 20 Amp Yellow Mod CRSM (Heat Rear LT)
F30 30 Amp Pink – Mod DTCM / Mod Tailgate
F31 30 Amp Pink – Mod CBC 1 Interior Light
F32 – 20 Amp Yellow RT Spot Lamp — If Equipped
F33 – 10 Amp Red Assy Overhead Console / Switch 911 / Switch Assist / Heads Up Display (HUD)
F34 – 15 Amp Blue Frt & RR Ventilated Seat Motor
F35 – 10 Amp Red Mod Inverter / Mtr Sunshade Sunroof / Mtr Dual Sunroof / USB Charge Only
F36 40 Amp Green – Mod CBC 2 Exterior Light 1
F37 – – Spare
F38 – – Spare
F39 – – Spare
F40 20 Amp Blue – Dome Pursuit Vehicle — If Equipped
F41 A&B – 15 Amp Blue Lumbar Support & Pass SW / Mod ICS Sw Bank / HVAC Ctrl / Sw
Bank Upper / Mod Ctrl Steering
F42 A&B – 10 Amp Red Mod Transfer Case Switch Module (TCSM) / SBW / Electric Park
Brake SW / Overhead Console (OHC) SW / E-Call / Bank 3 SW / Seat LT & RT Vent / Mod Trailer A&B Tire Pressure / Mod Gateway Trailer
F03 – 20 Amp Yellow Module Seat Heater Front (Pass)
F04 – – Spare
F05 – 20 Amp Yellow Module PPU Cooling Fan
F06 – – Spare
F07 40 Amp Green – Mod CBC 3 PWR Locks
F08 – – Spare
F09 – – Spare
F10 40 Amp Green – HVAC Blower Motor
F11 – 5 Amp Tan Output to Under-hood Power Distribution Center (UPDC) Run Coil
F12 – 25 Amp Clear Mod Audio Amplifier / Active Noise Cancellation / SW Inverter
F13 – 20 Amp Yellow Mod Seat Heater Front (Driver)
F14 – 15 Amp Blue Mod Seat Heater Front (Steering Wheel)
F15 – – Spare
F16 – – Spare
F17 – 20 Amp Yellow LT Spot Lamp — If Equipped
F18 30 Amp Pink – Motor Sunshade Sunroof
F19 – – Spare
F20 – 20 Amp Yellow Comfort Rear Seat Module (CRSM) (Heat Rear RT)
F21 – – Spare
F22 – – Spare
F23 – – Spare
F24 – 15 Amp Blue Mod RF Hub / Mod Ignition / Mod Cluster
F25 40 Amp Green – Mod Integrated Trailer Brake
F26 – 15 Amp Blue Mod Cluster CCN / Mod Cyber Security
F27 – 5 Amp Tan Mod Cluster CCN / Mod SGW
F28 – 10 Amp Red Mod ORC
F29 – 20 Amp Yellow Mod CRSM (Heat Rear LT)
F30 30 Amp Pink – Mod DTCM / Mod Tailgate
F31 30 Amp Pink – Mod CBC 1 Interior Light
F32 – 20 Amp Yellow RT Spot Lamp — If Equipped
F33 – 10 Amp Red Assy Overhead Console / Switch 911 / Switch Assist / Heads Up Display (HUD)
F34 – 15 Amp Blue Frt & RR Ventilated Seat Motor
F35 – 10 Amp Red Mod Inverter / Mtr Sunshade Sunroof / Mtr Dual Sunroof / USB Charge Only
F36 40 Amp Green – Mod CBC 2 Exterior Light 1
F37 – – Spare
F38 – – Spare
F39 – – Spare
F40 20 Amp Blue – Dome Pursuit Vehicle — If Equipped
F41 A&B – 15 Amp Blue Lumbar Support & Pass SW / Mod ICS Sw Bank / HVAC Ctrl / Sw
Bank Upper / Mod Ctrl Steering
F42 A&B – 10 Amp Red Mod Transfer Case Switch Module (TCSM) / SBW / Electric Park
Brake SW / Overhead Console (OHC) SW / E-Call / Bank 3 SW / Seat LT & RT Vent / Mod Trailer A&B Tire Pressure / Mod Gateway Trailer
F43 A&B – 10 Amp Red Port Diagnostics / Mod CD / Front & Rear USB
F44 – 20 Amp Yellow Radio / DCSD / Telematics Box Mod / Fleet Telematics Module
(FTM)
F45 30 Amp Pink – Mod Door MUX Driver
F46 30 Amp Pink – Mod Door MUX Passenger
F47 A&B – – Spare
F48A - 10 Amp Red Rear View Mirror / SW Window Passenger / Rear USB / Wireless
Charging Pad Mod
F49 – 15 Amp Blue Mod CVPM / SNSR Blind Spot / HDLP Adaptive Front Lighting
Sensor (AFLS)
F50A – 10 Amp Red Battery PACK Control Mod
F51 A&B – – Spare
F52 20 Amp Blue – Direct Battery Feed — If Equipped
F53 – 10 Amp Red Trailer Reverse Steering Control / Trailer Steering Control Knob
F54B – 20 Amp Yellow Power Outlet Center Seat
F55 25 Amp White – Upfitter — If Equipped
F56 30 Amp Pink – Mod Network Interface — If Equipped
F57 20 Amp Blue – Direct Battery Feed — If Equipped
F58 20 Amp Blue – Direct Battery Feed — If Equipped
F60 50 Amp Red – Mod Inverter
F61 – – Spare
F62 A&B – 10 Amp Red ITBM / Mod Occupant Class / Mod IAIR Suspension / Mod HVAC
Snsr Incar Temp / Rear Coolant Temp / PTS / Mod IRCM / HRLS / Mod Gateway Trailer TPM
F63 – – Spare
F64 – – Spare
F65 – 10 Amp Red Mod ORC
F66 – 10 Amp Red Run Accessory Feed — If Equipped
CAUTION
- When installing the power distribution center cover, it is important to ensure the cover is properly positioned and fully latched. Failure to do so may allow water to get into the power distribution center and possibly result in an electrical system failure.
- When replacing a blown fuse, it is important to use only a fuse having the correct amperage rating. The use of a fuse with a rating other than indicated may result in a dangerous electrical system overload. If a properly rated fuse continues to blow, it indicates a problem in the circuit that must be corrected.
(FTM)
F45 30 Amp Pink – Mod Door MUX Driver
F46 30 Amp Pink – Mod Door MUX Passenger
F47 A&B – – Spare
F48A - 10 Amp Red Rear View Mirror / SW Window Passenger / Rear USB / Wireless
Charging Pad Mod
F49 – 15 Amp Blue Mod CVPM / SNSR Blind Spot / HDLP Adaptive Front Lighting
Sensor (AFLS)
F50A – 10 Amp Red Battery PACK Control Mod
F51 A&B – – Spare
F52 20 Amp Blue – Direct Battery Feed — If Equipped
F53 – 10 Amp Red Trailer Reverse Steering Control / Trailer Steering Control Knob
F54B – 20 Amp Yellow Power Outlet Center Seat
F55 25 Amp White – Upfitter — If Equipped
F56 30 Amp Pink – Mod Network Interface — If Equipped
F57 20 Amp Blue – Direct Battery Feed — If Equipped
F58 20 Amp Blue – Direct Battery Feed — If Equipped
F60 50 Amp Red – Mod Inverter
F61 – – Spare
F62 A&B – 10 Amp Red ITBM / Mod Occupant Class / Mod IAIR Suspension / Mod HVAC
Snsr Incar Temp / Rear Coolant Temp / PTS / Mod IRCM / HRLS / Mod Gateway Trailer TPM
F63 – – Spare
F64 – – Spare
F65 – 10 Amp Red Mod ORC
F66 – 10 Amp Red Run Accessory Feed — If Equipped
CAUTION
- When installing the power distribution center cover, it is important to ensure the cover is properly positioned and fully latched. Failure to do so may allow water to get into the power distribution center and possibly result in an electrical system failure.
- When replacing a blown fuse, it is important to use only a fuse having the correct amperage rating. The use of a fuse with a rating other than indicated may result in a dangerous electrical system overload. If a properly rated fuse continues to blow, it indicates a problem in the circuit that must be corrected.
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