2021 FORD TRANSIT tow

Protected Component
Fuse Rating
Item
Upfitter interface.
Secondary junction box.
Rear climate control.
10 A
59 Front view camera.
Rear view camera.
Adaptive cruise control module.
Blind spot information system.
Trailer brake control module.
10 A
60
Not used.
-
61
Enhanced cut off relay system module.
15 A
62
Auxiliary power point.
20 A
63
Modified vehicle connections.
30 A
64
Not used.
-
65
Enhanced cut off relay system.
10 A
66 Camper.
Load shed relay.
Not used.
-
67
Trailer tow module.
5 A
68
Steering wheel module.
5 A
69
Swivel seats.
5 A
70
Passenger heated seat.
10 A
71
Driver heated seat.
10 A
72
Adaptive front lighting module.
20 A
73
Headlamp leveling.
Not used.
-
74
Engine compartment fuse box.
20 A
75
Power sliding door control switch.
10 A
76
Headlamp switch.
5 A
77
Modified vehicle connections.
7.5 A
78
Driver compartment fuse box relay.
5 A
79
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2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Fuses

Protected Component
Fuse Rating
Item
Not used.
-
80
Trailer tow module.
40 A
81
Power sliding door.
30 A
82
Trailer brake control module.
30 A
83
Body control module.
50 A
84
Power sliding door.
30 A
85
Body control module.
50 A
86
Body Control Module Protected Component
Fuse Rating
Item
Not used.
-
1
Power inverter.
10 A
2
Power window switch.
7.5 A
3
Power exterior mirrors.
Not used.
20 A
4
271
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing FusesE145984

•
Sustained ambient temperatures of
-9°F (-23°C) or below.
• Sustained ambient temperatures of
100°F (38°C)
or above.
• Sustained towing operation above
1,000 mi (1,600 km)
.
• Sustained high-speed driving at Gross
Vehicle Weight Rating (maximum
loaded weight for vehicle operation).
• Sustained use of diesel fuel other than
ultra-low sulfur diesel (ULSD).
OIL CHANGE INDICATOR
RESET
Only reset the system after changing the
engine oil and oil filter.
Resetting the Oil Life Monitoring
System
1. Switch the ignition on. Do not start the
engine.
2. Fully press the accelerator and brake pedals at the same time.
3. Keep the accelerator and brake pedals
fully pressed.
4. After 25 seconds, the oil change reminder resets.
5. Release the accelerator and brake pedals.
6. Switch the ignition off.
7. Switch the ignition on to confirm that the oil change reminder does not
display. CHANGING THE ENGINE AIR
FILTER WARNING: To reduce the risk of
vehicle damage and personal burn
injuries, do not start your engine with the
air cleaner removed and do not remove
it while the engine is running.
Note: Failure to use the correct air filter
element may result in severe engine
damage. The vehicle Warranty may be void
for any damage to the engine if the correct
air filter element is not used.
Only use the specified air filter.
See
Capacities and Specifications (page
352).
Change the air filter element at the proper
interval.
See Scheduled Maintenance
(page 446). 1. Disconnect the intake air temperature
sensor electrical connector and cable
from the air filter cover.
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2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing MaintenanceE174607
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3

How Fail-Safe Cooling Works
If the engine begins to overheat,
the coolant temperature gauge
moves toward the red zone:
A warning lamp illuminates and
a message may appear in the
information display.
If the engine reaches a preset
over-temperature condition, the engine
automatically switches to alternating
cylinder operation. Each disabled cylinder
acts as an air pump and cools the engine.
When this occurs, your vehicle still
operates, however:
• Engine power is limited.
• The air conditioning system turns off.
Continued operation increases the engine
temperature, causing the engine to
completely shut down. Your steering and
braking effort increases in this situation.
When the engine temperature cools, you
can re-start the engine. Have your vehicle
checked as soon as possible to minimize
engine damage.
When Fail-Safe Mode Is Activated WARNING: Fail-safe mode is for
use during emergencies only. Operate
your vehicle in fail-safe mode only as
long as necessary to bring your vehicle
to rest in a safe location and seek
immediate repairs. When in fail-safe
mode, your vehicle will have limited
power, will not be able to maintain
high-speed operation, and may
completely shut down without warning,
potentially losing engine power, power
steering assist, and power brake assist,
which may increase the possibility of a
crash resulting in serious injury. WARNING:
Do not remove the
coolant reservoir cap when the engine is
on or the cooling system is hot. Wait 10
minutes for the cooling system to cool
down. Cover the coolant reservoir cap
with a thick cloth to prevent the
possibility of scalding and slowly remove
the cap. Failure to follow this instruction
could result in personal injury.
Your vehicle has limited engine power
when in the fail-safe mode, drive your
vehicle with caution. Your vehicle does not
maintain high-speed operation and the
engine may operate poorly.
Remember that the engine is capable of
automatically shutting down to prevent
engine damage. In this situation:
1. Pull off the road as soon as safely possible and switch the engine off.
2. If you are a member of a roadside assistance program, we recommend
that you contact your roadside
assistance service provider.
3. If this is not possible, wait for a short period of time for the engine to cool.
4. Check the coolant level. If the coolant level is at or below the minimum mark,
add prediluted coolant immediately.
5. When the engine temperature cools, you can re-start the engine. Have your
vehicle checked as soon as possible to
minimize engine damage.
Note: Driving your vehicle without repair
increases the chance of engine damage.
288
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Maintenance

Engine Coolant Temperature
Management (If Equipped)
WARNING:
To reduce the risk of
crash and injury, be prepared that the
vehicle speed may reduce and the
vehicle may not be able to accelerate
with full power until the coolant
temperature reduces.
If you tow a trailer with your vehicle, the
engine may temporarily reach a higher
temperature during severe operating
conditions, for example ascending a long
or steep grade in high ambient
temperatures.
At this time, you may notice the coolant
temperature gauge moves toward the red
zone and a message may appear in the
information display.
You may notice a reduction in vehicle
speed caused by reduced engine power in
order to manage the engine coolant
temperature. Your vehicle may enter this
mode if certain high-temperature and
high-load conditions take place. The
amount of speed reduction depends on
vehicle loading, grade and ambient
temperature. If this occurs, there is no
need to stop your vehicle. You can
continue to drive.
The air conditioning may automatically
turn on and off during severe operating
conditions to protect the engine from
overheating. When the coolant
temperature decreases to the normal
operating temperature, the air conditioning
turns on.
If the coolant temperature gauge moves
fully into the red zone, or if the coolant
temperature warning or service engine
soon messages appear in your information
display, do the following: 1. Stop your vehicle as soon as it is safe
to do so. Fully apply the parking brake,
shift into park (P) or neutral (N).
2. Leave the engine running until the coolant temperature gauge needle
returns to the normal position. If the
temperature does not drop after
several minutes, follow the remaining
steps.
3. Switch the engine off and wait for it to
cool. Check the coolant level.
4. If the coolant level is at or below the minimum mark, add prediluted coolant
immediately.
5. If the coolant level is normal, restart the engine and continue.
AUTOMATIC TRANSMISSION
FLUID CHECK
The automatic transmission does not have
a transmission fluid dipstick.
Have an authorized dealer check and
change the transmission fluid at the
correct service interval. Your transmission
does not consume fluid. However, if the
transmission slips, shifts slowly or if you
notice a sign of leaking fluid, contact an
authorized dealer.
Do not use supplemental transmission
fluid additives, treatments or cleaning
agents. The use of these materials may
affect transmission operation and result
in damage to internal transmission
components.
289
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Maintenance

7.
Remove the battery terminal cover and
remove the negative (-) terminal.
Note: Single batteries could be mounted
the opposite way around in the battery tray.
The negative terminal is toward the rear of
your vehicle. 8.
Release the retaining clips and remove
the cover.
9. Remove the cable securing clips from the cover. 10.
Remove the positive (+) terminal and
remove the battery.
Note: Batteries are heavy.
11. Move the second battery toward the rear of your vehicle and remove the
negative (
-) terminal.
12. Remove the positive (+) terminal and
remove the battery.
Replacing the Battery WARNING:
Make sure that you
securely fasten the seat runner bolts
before installing the covers.
You must replace the battery with one of
exactly the same specification.
To install, reverse the removal procedure.
Note: Make sure that you correctly install
the battery terminal covers, battery cover
and battery cable clips.
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2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing MaintenanceE162774 8
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CHANGING THE FRONT WIPER
BLADES
1. Lift the wiper arm. Press the wiper
blade locking button.
Note: Do not hold the wiper blade when
lifting the wiper arm.
2. Remove the wiper blade.
Note: Make sure that the wiper arm does
not spring back against the glass when the
wiper blade is not attached.
3. To install, reverse the removal procedure.
Note: Make sure that the wiper blade locks
into place.
REMOVING A HEADLAMP WARNING: Switch all of the lamps
and the ignition off. Failure to follow this
warning could result in serious personal
injury.
1. Open the hood. See
Opening and
Closing the Hood (page 278). 2. Remove the screws.
3. Pull the headlamp toward the front of
your vehicle to disengage it from its
locating points and then lift the
headlamp up. 4. Disconnect the electrical connectors.
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2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing MaintenanceE72899 E169198
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Front Clearance Lamp (If Equipped)
1. Carefully remove the lamp.
2.
Turn the bulb holder counterclockwise
and remove it.
3. Remove the bulb by pulling it straight out. Side Direction Indicator (If Equipped) 1. Remove the large mirror glass. Tilt the
mirror glass fully up, pull the mirror
glass toward you from the bottom.
2. Remove the small mirror glass. Tilt the
mirror glass fully down, pull the mirror
glass toward you from the top.
3. Remove the screws.
4. Remove the lamp lens.
5. Remove the bulb.
Rear Lamps 1. Remove the screws.
2. Remove the lamp.
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2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing MaintenanceE181397
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