oil RAM CHASSIS CAB 2021 Workshop Manual

380SERVICING AND MAINTENANCE
BODY LUBRICATION
Locks and all body pivot points, including such
items as seat tracks, door hinge pivot points
and rollers, liftgate, tailgate, decklid, sliding
doors and hood hinges, should be lubricated
periodically with a lithium-based grease, such
as Mopar Spray White Lube to ensure quiet,
easy operation and to protect against rust and
wear. Prior to the application of any lubricant,
the parts concerned should be wiped clean to
remove dust and grit; after lubricating excess,
oil and grease should be removed. Particular
attention should also be given to hood latching
components to ensure proper function. When
performing other underhood services, the hood
latch, release mechanism and safety catch
should be cleaned and lubricated.
The external lock cylinders should be lubricated
twice a year, preferably in the Autumn and
Spring. Apply a small amount of a high quality
lubricant, such as Mopar Lock Cylinder
Lubricant directly into the lock cylinder.
WINDSHIELD WIPER BLADES
Clean the rubber edges of the wiper blades and
the windshield periodically with a sponge or soft
cloth and a mild nonabrasive cleaner. This will
remove accumulations of salt or road film.
Operation of the wipers on dry glass for long
periods may cause deterioration of the wiper
blades. Always use washer fluid when using
the wipers to remove salt or dirt from a dry
windshield.
Avoid using the wiper blades to remove frost or
ice from the windshield. Keep the blade rubber
out of contact with petroleum products such as
engine oil, gasoline, etc.
NOTE:
Life expectancy of wiper blades varies
depending on geographical area and frequency
of use. Poor performance of blades may be
present with chattering, marks, water lines
or wet spots. If any of these conditions are
present, clean the wiper blades or replace as
necessary. The wiper blades and wiper arms should be
inspected periodically, not just when wiper
performance problems are experienced.
This inspection should include the following
points:
Wear or uneven edges
Foreign material
Hardening or cracking
Deformation or fatigue
If a wiper blade or wiper arm is damaged,
replace the affected wiper arm or blade with a
new unit. Do not attempt to repair a wiper arm
or blade that is damaged.
Wiper Blade Removal/Installation
CAUTION!
Do not allow the wiper arm to spring back
against the glass without the wiper blade in
place or the glass may be damaged.

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382SERVICING AND MAINTENANCE
5. With the wiper blade disengaged, remove
the wiper blade from the wiper arm by
holding the wiper arm with one hand and
separating the wiper blade from the wiper
arm with the other hand (move the wiper
blade down toward the base of the wiper
arm and away from the J hook in the end of
the wiper arm).

Removing Wiper From Wiper Arm

6. Gently lower the wiper arm onto the glass. Installing The Front Wipers

1. Lift the wiper arm off of the glass, until the
wiper arm is in the full up position.

2. Position the wiper blade under the hook on the tip of the wiper arm with the wiper
locking tab open.
3. Insert the receiver bracket on the wiper assembly into the hook on the tip of the arm
through the opening in the wiper blade
under the locking tab.
4. Slide the wiper blade up into the hook on the wiper arm until it is latched
(engagement will be accompanied by an
audible click). Fold down the latch release
tab and snap it into its locked position.
5. Gently lower the wiper blade onto the glass.
EXHAUST SYSTEM
The best protection against carbon monoxide
entry into the vehicle body is a properly
maintained engine exhaust system.
If you notice a change in the sound of the exhaust
system; or if the exhaust fumes can be detected
inside the vehicle; or when the underside or rear
of the vehicle is damaged; have an authorized
technician inspect the complete exhaust system
and adjacent body areas for broken, damaged,
deteriorated, or mispositioned parts. Open
seams or loose connections could permit
exhaust fumes to seep into the passenger
compartment. In addition, have the exhaust
system inspected each time the vehicle is raised
for lubrication or oil change. Replace as required.

1 — Wiper
2 — Locking Tab
3 — Wiper Arm J Hook
WARNING!
Exhaust gases can injure or kill. They
contain carbon monoxide (CO), which is
colorless and odorless. Breathing it can
make you unconscious and can eventually
poison you Ú
page 333.
A hot exhaust system can start a fire if you
park over materials that can burn. Such
materials might be grass or leaves coming
into contact with your exhaust system.
Do not park or operate your vehicle in areas
where your exhaust system can contact
anything that can burn.

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SERVICING AND MAINTENANCE387
(Continued)
BRAKE SYSTEM
In order to ensure brake system performance,
all brake system components should be
inspected periodically Ú page 354.
Fluid Level Check — Brake Master Cylinder
The fluid level of the master cylinder should be
checked when performing under the hood
service or immediately if the brake system
warning lamp indicates system failure.

If necessary, add fluid to bring level within the
designated marks on the side of the reservoir of the
brake master cylinder. Be sure to clean the top of
the master cylinder area before removing cap.
With disc brakes the fluid level can be expected
to fall as the brake linings wear. However, an
unexpected drop in fluid level may be caused by
a leak and a system check should be conducted.

For further information Ú
page 444.
AUTOMATIC TRANSMISSION
Special Additives

The manufacturer strongly recommends against
using any special additives in the transmission.
Automatic Transmission Fluid (ATF) is an
engineered product and its performance may be
impaired by supplemental additives. Therefore,
do not add any fluid additives to the transmission.
The only exception to this policy is the use of special
dyes for diagnosing fluid leaks in six-speed
transmissions. Avoid using transmission sealers as
they may adversely affect seals.

WARNING!
Riding the brakes can lead to brake failure
and possibly a collision. Driving with your foot
resting or riding on the brake pedal can result
in abnormally high brake temperatures,
excessive lining wear, and possible brake
damage. You would not have your full braking
capacity in an emergency.WARNING!
Use only manufacturer's recommended
brake fluid Úpage 444. Using the wrong
type of brake fluid can severely damage
your brake system and/or impair its perfor -
mance. The proper type of brake fluid for
your vehicle is also identified on the original
factory installed hydraulic master cylinder
reservoir.

To avoid contamination from foreign matter
or moisture, use only new brake fluid or fluid
that has been in a tightly closed container.
Keep the master cylinder reservoir cap
secured at all times. Brake fluid in a open
container absorbs moisture from the air
resulting in a lower boiling point. This may
cause it to boil unexpectedly during hard or
prolonged braking, resulting in sudden brake
failure. This could result in a collision.

Overfilling the brake fluid reservoir can
result in spilling brake fluid on hot engine
parts, causing the brake fluid to catch fire.
Brake fluid can also damage painted and
vinyl surfaces, care should be taken to
avoid its contact with these surfaces.
Do not allow petroleum based fluid to
contaminate the brake fluid. Brake seal
components could be damaged, causing
partial or complete brake failure. This could
result in a collision.
WARNING! (Continued)
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SERVICING AND MAINTENANCE389
7. Remove the dipstick again and note the
fluid level on both sides. The fluid level
reading is only valid if there is a solid
coating of oil on both sides of the dipstick.
Note that the holes in the dipstick will be full
of fluid if the actual level is at or above the
hole. The fluid level should be between the
“HOT” (upper) reference holes on the
dipstick at normal operating temperature.
If the fluid level is low, add fluid through the
dipstick tube to bring it to the proper level.
Do not overfill. Use ONLY the specified fluid
Ú page 444. After adding any quantity of oil
through the dipstick tube, wait a minimum
of two minutes for the oil to fully drain into
the transmission before rechecking the
fluid level.
NOTE:

If it is necessary to check the transmission below
the operating temperature, the fluid level should be
between the two “COLD” (lower) holes on the
dipstick with the fluid at 60-70°F / 16-21°C. Only
use the COLD region of the dipstick as a rough refer -
ence when setting the fluid level after a transmis -sion service or fluid change. Re-check the fluid level,
and adjust as required, once the transmission
reaches normal operating temperature.

8. Reinsert the dipstick. Check for leaks.
Release the parking brake.
NOTE:

If it is necessary to check the transmission below
the operating temperature, the fluid level should be
between the two COLD (lower) holes on the dipstick
with the fluid at 68-86°F / 20-30°C. Only use the
COLD region of the dipstick as a rough reference
when setting the fluid level after a transmission
service or fluid change. Re-check the fluid level, and
adjust as required, once the transmission reaches
normal operating temperature.

Fluid And Filter Changes — Eight-Speed
Transmission
Under normal operating conditions, the fluid
installed at the factory will provide satisfactory
lubrication for the life of the vehicle.

Routine fluid and filter changes are not required.
However, change the fluid and filter if the fluid
becomes contaminated (with water, etc.), or if the
transmission is disassembled for any reason.

Fluid And Filter Changes — Six Speed
Transmission
For the proper maintenance intervals
Ú page 354.
In addition, change the fluid and filters if the
fluid becomes contaminated (with water, etc.),
or if the transmission is disassembled for any
reason.
CAUTION!
If the fluid temperature is below 50°F (10°C)
it may not register on the dipstick. Do not add
fluid until the temperature is elevated enough
to produce an accurate reading. Run the
engine at idle, in PARK, to warm the fluid.
CAUTION!
If the fluid temperature is below 50°F (10°C)
it may not register on the dipstick. Do not add
fluid until the temperature is elevated enough
to produce an accurate reading. Run the
engine at idle, in PARK, to warm the fluid.
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SERVICING AND MAINTENANCE391
Lubricant Selection
For further information Úpage 444.
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 DO REQUIRE limited
slip oil additive (friction modifiers).
NOTE:
Slight noise and mild shuddering may be
evident while turning a vehicle with limited
slip differential on concrete or dry pavement.
These conditions should be considered normal
operation of the limited slip differential.
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 with the
vehicle in a level position.
Drain And Refill
For the proper maintenance intervals
Ú page 354.
Selection Of Lubricant
Use only the manufacturer's recommended
fluid Ú page 444.
NOISE CONTROL SYSTEM REQUIRED
M
AINTENANCE & WARRANTY

All vehicles built over 10,000 lbs. (4,535 kg) Gross
Vehicle Weight Rating and manufactured for sale
and use in the United States are required to comply
with the Federal Government's Exterior Noise
Regulations. These vehicles can be identified by
the Noise Emission Control Label located in the
operator's compartment.

Required Maintenance For Noise Control
Systems
The following maintenance services must be
performed every six months or 7,500 miles
(12,000 km) whichever comes first, to ensure
proper operation of the noise control systems.
In addition, inspection and service should be
performed anytime a malfunction is observed or
suspected. Proper maintenance of the entire
vehicle will help the effectiveness of the noise
control systems.
Exhaust System
Inspect the entire exhaust system for leaks and
damaged parts. Devices such as hangers,
clamps, and U-bolts should be tight and in good
condition. Damaged components, burned or
blown out mufflers, burned or rusted out
exhaust pipes should be replaced according to
the procedures and specifications outlined in
the appropriate service manual.
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SERVICING AND MAINTENANCE397
F32– –Spare
F33 20 Amp Blue –Trans Control Module – If Equipped
F34 30 Amp Pink –Vehicle System Interface Module #2 – If Equipped
F35 30 Amp Pink –Sunroof – If Equipped
F36 30 Amp Pink –Electric Back Light – If Equipped
F37 30 Amp Pink –Diesel Frame / Fuel Heater #2– If Equipped
F38 30 Amp Pink –Integrated Trailer Brake Module – If Equipped
F39 – –Spare
F40 –10 Amp Red Ventilated Seats – If Equipped
F41 –10 Amp Red Active Grille Shutter / Active Air Dam – If Equipped
F42 –20 Amp Yellow Horn
F43 –15 Amp Blue Heated Steering Wheel – If Equipped
F44 –10 Amp Red Diagnostic Port
F46 –10 Amp Red Upfitters Relay Coil – If Equipped
F47 – –Spare
F48 – –Spare
F49 –10 Amp Red IP Cluster / CSG
F50 –20 Amp Yellow Air Suspension Control Module – If Equipped
F51 –10 Amp RedIgnition Node Module / Keyless Ignition Node Module, Radio Frequency
Hub Module / Electric Steering Column Lock - If Equipped
F52 –5 Amp Tan Battery Sensor
Cavity Cartridge Fuse Micro Fuse Description
8

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398SERVICING AND MAINTENANCE
F53–20 Amp Yellow Trailer Tow – Left Turn/Stop Lights - If Equipped
F54 –20 Amp Yellow Non Memory Adjustable Pedals - If Equipped
F55 – –Spare
F56 –10 Amp Red Fuel Vapor Blocker Valve - If Equipped
F57 –20 Amp Yellow TCM / PCM / Solenoid Trans Pressure SW (RFE Trans Only) – If Equipped
F58 –10 Amp Red Bed Lighting (LED) – If Equipped
F60 – —Spare
F61 –10 Amp Red NH3 Sensor / PM Sensor – If Equipped
F62 –10 Amp Red Air Conditioning Clutch
F63 –20 Amp Yellow Ignition Coils / CAPS
F64 –25 Amp Clear Fuel Injectors / Powertrain Control Module / SRV – If Equipped
F65 –10 Amp Red MOD Inverter (Wake Up) / Power Port / USB IP / WCPM – If Equipped
F66 –10 Amp Red Sunroof / USB Rear– If Equipped
F67 –10 Amp Red UCI Port / USB Front
F68 –10 Amp Red AEB RACAM HTR – If Equipped
F69 –15 Amp Blue SCR Module 12 Volt– If Equipped
F70 –30 Amp Green Fuel Pump Motor / K09 RLY Coil Feed – If Equipped
F71 –25 Amp Clear Amplifier / Active Noise Cancellation – If Equipped
F72 – —Spare
F73 –20 Amp Yellow Fuel Transfer Pump – If Equipped
Cavity Cartridge Fuse Micro Fuse Description

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SERVICING AND MAINTENANCE399
F74–10 Amp Red Backup Alarm – If Equipped
F75 –10 Amp Red ATMM / Coil-SCR Module RLY – If Equipped
F76 –10 Amp Red Electronic Stability Control — If Equipped
F77 –10 Amp Red Drivetrain Control Module / Front Axle Disconnect Module / TCM/ STOM
F78 –15 Amp BlueEngine Control Module / Powertrain Control Module / AEB RACM MOD /
Feed To AUX PDC Relay Coils/ HRLS
F79 –15 Amp Blue ID / Clearance Lights
F80 –10 Amp Red Overhead Console / Assist / 911 – If Equipped
F81 –20 Amp Yellow Trailer Tow Right Turn / Stop Lights - If Equipped
F82 –10 Amp Red Steering Column Control Module / Cruise Control
F83 – –Spare
F84 –15 Amp Blue ASBM / HVAC / ICS / Rear Heated Seat Switches
F85 –10 Amp Red Airbag Module
F86 –10 Amp Red Airbag Module
F87 –10 Amp RedAir Suspension / ITBM / Steering Column Control Module / MOD Gateway
CAN-C Trailer TPM
F88 –15 Amp Blue Instrument Panel Cluster
F90/F91 –20 Amp Yellow Power Outlet / Batt
Power Outlet / Acc
F92 – –Spare
F93 – –Spare
Cavity Cartridge Fuse Micro Fuse Description
8

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400SERVICING AND MAINTENANCE
(Continued)
F94 –10 Amp RedShift-By-Wire / Transfer Case Switch / Module TPM Trailer / Module
Gateway Can-C Trailer TPM
F95 –10 Amp RedRearview Camera / Park Assist / CHMSL Camera / Blind Spot Sensor /
Surround View Camera
F96 –10 Amp Red Trailer Camera – If Equipped
F97 –20 Amp Yellow Front Heated Seat Passenger – If Equipped
F98 –20 Amp Yellow Front Heated Seat Driver – If Equipped
F99 –10 Amp Red HVAC / In-Car Temperature Sensor / CSG MOD
F100 –10 Amp Red Upfitters Box Feed– If Equipped
F101 –20 Amp Yellow Rear Heated Seat Right — If Equipped
F102 –20 Amp Yellow Rear Heated Seat Left / Run RLY #3 Coil — If Equipped
F103 –10 Amp Red HeadLamp AFLS — If Equipped
F104 –20 Amp Yellow UCI Port / USB Rear
Cavity Cartridge Fuse Micro Fuse Description
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.

CAUTION! (Continued)

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SERVICING AND MAINTENANCE403
4. Reach through the access hole of the wheel
house splash shield and disengage the bulb
access cover by rotating counterclockwise.

Bulb Access Cover

5. Disconnect the internal lamp wiring harness connector from the low beam bulb. 6. Rotate the bulb counterclockwise a quarter
turn to unlock the bulb from the lamp.
7. Pull the bulb straight out from the housing.
8. Reverse the procedure for installation of new bulb and covers.
High Beam
See below steps to replace:

1. Open the hood.

2. Disconnect and isolate the negative battery cable.

Bulb Access Cover

3. Look under the hood and behind the headlamp to find the high beam bulb
access cover. 4. Reach behind the headlamp and disengage
the access cover by rotating counter -
clockwise.
5. Disconnect the internal lamp wiring harness connector from the high beam bulb.
6. Rotate the bulb counterclockwise a quarter turn to unlock the bulb from the lamp.
7. Pull the bulb straight out from the housing.
8. Reverse the procedure for installation of new bulb and covers.
CAUTION!
Do not contaminate the bulb glass by
touching it with your fingers or by allowing it
to contact other oily surfaces. Shortened
bulb life will result.

Always use the correct bulb size and type for
replacement. An incorrect bulb size or type
may overheat and cause damage to the
lamp, the bulb socket, or the lamp wiring.

CAUTION!
Do not contaminate the bulb glass by
touching it with your fingers or by allowing it
to contact other oily surfaces. Shortened
bulb life will result.
Always use the correct bulb size and type
for replacement. An incorrect bulb size or
type may overheat and cause damage to
the lamp, the bulb socket, or the lamp
wiring.
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