2021 RAM 1500 fuse

SERVICING AND MAINTENANCE407
3.0L DIESEL ENGINE
1 — Engine Air Cleaner Filter 5 — Brake Fluid Reservoir Cap
2 — Engine Coolant Reservoir Pressure Cap 6 — Battery
3 — Engine Oil Dipstick 7 — Power Distribution Center (Fuses)
4 — Engine Oil Fill 8 — Washer Fluid Reservoir Cap
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SERVICING AND MAINTENANCE427
Drain And Refill
For the proper maintenance intervals
Úpage 395.
Lubricant Selection
For further information Ú page 478.
NOTE:
The presence of water in the gear lubricant will
result in corrosion and possible failure of differ -
ential components. Operation of the vehicle in
water, as may be encountered in some
off-highway types of service, will require
draining and refilling the axle to avoid damage.
Limited-Slip Differentials
Rear axles equipped with a Limited Slip
Differential require that 5 oz. (148 ml) Mopar
Limited Slip Additive be added to the gear
lubricant Ú page 478. The Mopar Limited Slip
Additive should be added to the gear lubricant
whenever a fluid change is made to an axle
equipped with a Limited Slip Differential. NOTE:
When refilling a limited slip differential axle
which requires a friction modification additive,
the additive should be added before the gear
lubricant to ensure proper additive fill.TRANSFER CASE
Fluid Level Check
This fluid level can be checked by removing the
filler plug. The fluid level should be to the
bottom edge of the filler plug hole (or within
1/8 inch of the bottom) with the vehicle in a
level position.
Drain And Refill
For the proper maintenance intervals
Ú
page 395.
Selection Of Lubricant
Use only the recommended fluid Ú page 478.
FUSES
General Information
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.
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, trans -
mission system) or steering system blows,
contact an authorized dealer.
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428SERVICING AND MAINTENANCE
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.
Blade Fuses

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
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.
1 — Fuse Element
2 — Blade Fuse with a good/functional fuse ele -
ment
3 — Blade fuse with a bad/not functional fuse el -
ement (blown fuse)
Cavity Cartridge Fuse Micro Fuse Description
F01–25 Amp Clear Fuel Pump Motor
F03 –5 Amp Tan MGU
F04 ––Spare
F05 ––Spare

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SERVICING AND MAINTENANCE429
F06–10 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
Cavity Cartridge Fuse Micro Fuse Description
8

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430SERVICING AND MAINTENANCE
F2650 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 RedPCM / 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
CavityCartridge Fuse Micro Fuse Description

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SERVICING AND MAINTENANCE431
F4630 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
CavityCartridge Fuse Micro Fuse Description
8

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432SERVICING AND MAINTENANCE
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.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.
CavityCartridge Fuse Micro Fuse Description
F0130 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

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SERVICING AND MAINTENANCE433
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
CavityCartridge Fuse Micro Fuse Description
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