Page 225 of 475

WARNINGS
Only use brake fluid from a sealed
container. Contamination with dirt,
water, petroleum products or other
materials may result in brake system
damage or failure. Failure to adhere to this
warning could result in the loss of vehicle
control, serious personal injury or death. Do not allow the fluid to touch your
skin or eyes. If this happens, rinse the
affected areas immediately with
plenty of water and contact your physician. A fluid level between the MAX and
MIN lines is within the normal
operating range and there is no need
to add fluid. A fluid level not in the normal
operating range could compromise the
performance of the system. Have your
vehicle checked immediately. To avoid fluid contamination, the reservoir
cap must remain in place and fully tight,
unless you are adding fluid.
Only use fluid that meets Ford
specifications. See
Capacities and
Specifications (page 272). CLUTCH FLUID CHECK
The clutch and brake systems share the
same fluid reservoir. See
Brake Fluid
Check (page 221).
POWER STEERING FLUID
CHECK
Your vehicle is equipped with an electric
power steering (EPS) system. There is no
fluid reservoir to check or fill.
WASHER FLUID CHECK WARNING
If you operate your vehicle in
temperatures below 40°F (5°C), use
washer fluid with antifreeze
protection. Failure to use washer fluid with
antifreeze protection in cold weather could
result in impaired windshield vision and
increase the risk of injury or accident. Add fluid to fill the reservoir if the level is
low. Only use a washer fluid that meets
Ford specifications. See
Capacities and
Specifications (page 272).
State or local regulations on volatile
organic compounds may restrict the use
of methanol, a common windshield washer
antifreeze additive. Washer fluids
containing non-methanol antifreeze
agents should be used only if they provide
cold weather protection without damaging
the vehicle ’s paint finish, wiper blades or
washer system.
FUEL FILTER
Your vehicle is equipped with a lifetime
fuel filter that is integrated with the fuel
tank. Regular maintenance or replacement
is not needed.
222
Mustang (CZG) Canada/United States of America, Vehicles Built From: 02-05-2016, enUSA, First Printing MaintenanceE170684
Page 226 of 475

CHANGING THE 12V BATTERY
WARNINGS
Batteries normally produce explosive
gases which can cause personal
injury. Therefore, do not allow
flames, sparks or lighted substances to
come near the battery. When working near
the battery, always shield your face and
protect your eyes. Always provide correct
ventilation. When lifting a plastic-cased battery,
excessive pressure on the end walls
could cause acid to flow through the
vent caps, resulting in personal injury and
damage to the vehicle or battery. Lift the
battery with a battery carrier or with your
hands on opposite corners. Keep batteries out of reach of
children. Batteries contain sulfuric
acid. Avoid contact with skin, eyes or
clothing. Shield your eyes when working
near the battery to protect against possible
splashing of acid solution. In case of acid
contact with skin or eyes, flush
immediately with water for a minimum of
15 minutes and get prompt medical
attention. If acid is swallowed, call a
physician immediately. Battery posts, terminals and related
accessories contain lead and lead
compounds. Wash hands after
handling. This vehicle may be fitted with more
than one battery. Removing the
battery cables from only one battery
does not disconnect your vehicle electrical
system. Make sure you disconnect the
battery cables from all batteries when
disconnecting power. Failure to do so may
cause serious personal injury or property
damage. Your vehicle is fitted with a Motorcraft
maintenance-free battery which normally
does not require additional water.
When a battery replacement is required,
you must use a recommended
replacement battery that matches the
electrical requirements of the vehicle.
Note:
After cleaning or replacing the
battery, make sure you reinstall the battery
cover or shield.
Note: If you add electrical accessories or
components to the vehicle, it may adversely
affect the low voltage battery performance
and durability. This may also affect the
performance of other electrical systems in
the vehicle.
For longer, trouble-free operation, keep the
top of the battery clean and dry.
If you see any corrosion on the battery or
terminals, remove the cables from the
terminals and clean with a wire brush. You
can neutralize the acid with a solution of
baking soda and water.
Because your vehicle ’s engine is
electronically controlled by a computer,
some control conditions are maintained
by power from the battery. When the
battery is disconnected or a new battery
is installed, the engine must relearn its idle
and fuel trim strategy for optimum
driveability and performance. Flexible fuel
vehicles (FFV) must also relearn the
ethanol content of the fuel for optimum
driveability and performance.
To restore the settings, do the following:
1. Apply the parking brake.
2. Shift into park (P) or neutral (N).
3. Switch off all accessories.
4. Press the brake pedal and start your vehicle.
223
Mustang (CZG) Canada/United States of America, Vehicles Built From: 02-05-2016, enUSA, First Printing Maintenance
Page 227 of 475

5. Run the engine until it reaches normal
operating temperature. While the
engine is warming up, complete the
following: Reset the clock. See Audio
System (page 292). Reset the power
windows bounce-back feature. See
Windows and Mirrors
(page 71).
Reset the radio station presets. See
Audio System
(page 292).
6. Allow the engine to idle for at least one
minute.
7. Drive the vehicle at least 10 mi (16 km)
to completely relearn the idle trim and
fuel trim strategy.
Note: If you do not allow the engine to
relearn the idle and fuel trim strategy, the
idle quality of your vehicle may be adversely
affected until the engine computer
eventually relearns the idle trim and fuel
trim strategy.
Note: For flexible fuel vehicles, if you are
operating on E85, you may experience poor
starts or an inability to start the engine and
driveability problems until the fuel trim and
ethanol content have been relearned.
Make sure that you dispose of old batteries
in an environmentally friendly way. Seek
advice from your local authority about
recycling old batteries.
If storing your vehicle for more than 30
days without recharging the battery, we
recommend that you disconnect the
battery cables to maintain battery charge
for quick starting.
Battery Management System
(If
Equipped)
The battery management system monitors
battery conditions and takes actions to
extend battery life. If excessive battery
drain is detected, the system temporarily
disables some electrical systems to
protect the battery. Systems included are:
•
Heated rear window.
• Heated seats.
• Climate control.
• Heated steering wheel.
• Audio unit.
• Navigation system.
A message may appear in the information
displays to alert you that battery
protection actions are active. These
messages are only for notification that an
action is taking place, and not intended to
indicate an electrical problem or that the
battery requires replacement.
After battery replacement, or in some
cases after charging the battery with an
external charger, the battery management
system requires eight hours of vehicle sleep
time to relearn the battery state of charge.
During this time your vehicle must remain
fully locked with the ignition switched off.
Note: Prior to relearning the battery state
of charge, the battery management system
may temporarily disable some electrical
systems.
Electrical Accessory Installation
To make sure the battery management
system works correctly, do not connect an
electrical device ground connection
directly to the battery negative post. This
can cause inaccurate measurements of
the battery condition and potential
incorrect system operation.
Note: If you add electrical accessories or
components to the vehicle, it may adversely
affect battery performance and durability.
This may also affect the performance of
other electrical systems in the vehicle.
224
Mustang (CZG) Canada/United States of America, Vehicles Built From: 02-05-2016, enUSA, First Printing Maintenance
Page 228 of 475

CHECKING THE WIPER
BLADES
Run the tip of your fingers over the edge of
the blade to check for roughness.
Clean the wiper blades with washer fluid
or water applied with a soft sponge or
cloth.
CHANGING THE WIPER
BLADES
1. Pull the wiper blade and arm away
from the glass and press the locking
buttons together. 2. Rotate and remove the wiper blade.
3. Attach the new blade to the arm and
snap it into place.
Replace wiper blades at least once per
year for optimum performance. Poor wiper quality can be improved by
cleaning the wiper blades and the
windshield. See Cleaning the Windows
and Wiper Blades (page 234).
ADJUSTING THE HEADLAMPS
Vertical Aim Adjustment
The headlamps on your vehicle are
properly aimed at the assembly plant. If
your vehicle has been in an accident, have
the alignment of your headlamps checked
by an authorized dealer.
Headlamp Aiming Target 8 feet (2.4 meters)
A
Center height of lamp to ground
B
25 feet (7.6 meters)
C
Horizontal reference line
D
Vertical Aim Adjustment
1. Park the vehicle directly in front of a wall or screen on a level surface,
approximately 25 feet (7.6 meters)
away.
225
Mustang (CZG) Canada/United States of America, Vehicles Built From: 02-05-2016, enUSA, First Printing MaintenanceE142463 E129990
1
1 2 E142592
Page 229 of 475

2. Measure the height from the center of
your headlamp (indicated by a 3.0
millimeter circle on the lens) to the
ground and mark an 8 foot (2.4 meter)
horizontal reference line on the vertical
wall or screen at this height (a piece of
masking tape works well).
Note: To see a clearer light pattern for
adjusting, you may want to block the light
from one headlamp while adjusting the
other.
3. Turn on the low beam headlamps to illuminate the wall or screen and open
the hood. Cover one of the headlamps
so no light hits the wall. 4.
There is a distinct cut-off (change from
light to dark) in the left portion of the
beam pattern. Position the top edge of
this cut-off 3 inches (7.5 centimeters)
below the horizontal reference line. 5. Locate the vertical adjuster on each
headlamp. Use a Phillips #2
screwdriver to turn the adjuster either
clockwise or counterclockwise to
adjust the vertical aim of the
headlamp.
6. Repeat Steps 3 through 7 to adjust the
other headlamp.
7. Close the hood and turn off the lamps.
Horizontal Aim Adjustment
The horizontal aim does not require any
adjustment for this vehicle. If a fault
occurs, have the system checked by an
authorized dealer.
CHANGING A BULB
Lamp Assembly Condensation
Exterior lamps have vents to
accommodate normal changes in pressure.
Condensation can be a natural occurrence
of this design. When moist air enters the
lamp assembly through the vents, there is
a possibility that condensation can occur
in cold temperatures. When normal
condensation occurs, a thin film of mist
can form on the interior of the lens. The
mist eventually clears and exits through
the vents during normal operation. Clearing
time may take as long as 48 hours under
dry weather conditions.
Examples of acceptable condensation are:
• Thin mist without streaks, drip marks
or droplets.
• Fine mist that covers less than 50% of
the lens.
Examples of unacceptable moisture are:
• Water puddle inside the lamp.
• Large water droplets, drip marks or
streaks on the interior of the lens.
226
Mustang (CZG) Canada/United States of America, Vehicles Built From: 02-05-2016, enUSA, First Printing MaintenanceE142465 E187824
Page 230 of 475

If any of the above conditions of
unacceptable moisture are present,
contact an authorized.
Replacing HID Headlamp Bulbs
Your vehicle has high intensity discharge
lamps. These lamps operate at a high
voltage. Contact an authorized dealer.
Accessing the Direction Indicator
and Fog Lamp Bulbs
1. Rotate the steering wheel to the
opposite side of the bulb needing
replacement. 2. Remove the three wheel liner
fasteners. 3. Locate the most outside fastener
attaching the front fascia to the wheel
liner and remove it. 4. Pull the wheel liner back toward the
tire to gain access to the bulbs.
Replacing the Direction Indicator
Bulbs 1.
Remove the bulb holder from the lamp
assembly by turning it
counterclockwise.
2. Disconnect the electrical connector.
3. Remove the bulb from the bulb holder
by pulling it straight out.
Replacing Fog Lamp Bulbs (If
Equipped)
1. Make sure the lighting control is in the off position.
2. Disconnect the electrical connector from the bulb by pulling it straight off. 227
Mustang (CZG) Canada/United States of America, Vehicles Built From: 02-05-2016, enUSA, First Printing MaintenanceE159695 E176616 E180889 E174588
Page 231 of 475

3. Rotate the bulb counterclockwise and
remove from the fog lamp assembly.
4. Install the bulb in reverse order.
Replacing LED Fog Lamp Bulbs (If
Equipped)
These lamps have LED bulbs. Contact an
authorized dealer.
Replacing Reverse Lamp Bulbs
1. Make sure the lighting control is in the off position.
2. Locate the reverse lamp bulb under the
rear bumper of your vehicle. To access
the bulb, reach behind the bumper.
3. Disconnect the electrical sensor from the bulb by pulling it straight off. 4. Rotate the bulb counterclockwise and
remove it from the reverse lamp
assembly.
Replacing rear, Brake, High-Mount
Brake, Rear Direction Indicator and
License Plate Lamp Bulbs
These lamps have LED bulbs. Contact an
authorized dealer.
BULB SPECIFICATION CHART
Replacement bulbs are specified in the
chart below. Headlamp bulbs must be
marked with an authorized "D.O.T." for
North America and an "E" for Europe to
make sure lamp performance, light
brightness and pattern and safe visibility.
The correct bulbs do not damage the lamp
assembly or void the lamp assembly
warranty and provide quality bulb
illumination time. Trade name
Function
D3S
Headlamps - high intensity discharge
(HID)*
7444NA (amber)
Front park and Direction indicators
WY5W (amber)
Sidemarker
LED
Fog lamp
H11
LED
Rear lamp, brake lamp and direction
indicator lamp*
228
Mustang (CZG) Canada/United States of America, Vehicles Built From: 02-05-2016, enUSA, First Printing MaintenanceE177487
Page 232 of 475
Trade name
Function
LED
High-mount brake lamp*
3156 or 3157
Backup lamp
LED
License plate lamp*
W5W
Dome and Map lamp
W5W
Glove box and Cargo lamp
To replace all instrument panel lights, contact an authorized dealer
* Contact an authorized dealer to replace the bulb.
229
Mustang (CZG) Canada/United States of America, Vehicles Built From: 02-05-2016, enUSA, First Printing Maintenance