Page 269 of 509
Protected Component
Fuse Rating
Item
Not used.
-
34
Vehicle power 2.
15 A
35
Engine coolant bypass valve.
5 A
36
Glow plugs.
5 A
37
Powertrain control module.
Anti-lock brake system with electronic stability
control (excluding 510 series).
40 A
38
Cooling fan (510 series).
60 A
Not used.
-
39
Vehicle power 3.
10 A
40
Not used.
-
41
Not used (excluding 510 series).
-
42 Cooling fan (510 series).
15 A
Anti-lock brake system pump.
60 A
43
Cooling fan (excluding 510 series).
25 A
44 Not used (510 series).
-
Trailer socket.
30 A
45
Not used.
-
46
Not used.
-
47
Cooling fan (excluding 510 series).
50 A
48 Anti-lock brake system with electronic stability
control (510 series).
40 A
Not used.
-
49
Not used.
-
50
Air conditioning clutch.
10 A
51
Cooling fan (excluding 510 series).
50 A
52 Cooling fan (510 series).
60 A
Not used.
-
53
266
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Fuses
Page 272 of 509
Protected Component
Fuse Rating
Item
Not used.
-
32
Not used.
-
33
Not used.
-
34
Not used.
-
35
Not used.
-
36
Not used.
-
37
Not used.
-
38
Not used.
-
39
Not used.
-
40
Load shed relay.
25 A
41
Starter relay.
40 A
42
Upfitter relay.
40 A
43
Starter relay.
40 A
44
Upfitter interface module.
10 A
45
Not used.
-
46
Not used.
-
47
Modified vehicle connections.
5 A
48
Brake pedal switch.
10 A
49
Passenger power seat.
30 A
50
Modified vehicle connections.
40 A
51
Driver power seat.
30 A
52
Battery.
60 A
53
Power inverter.
60 A
54
Body control module.
50 A
55
Modified vehicle connections.
10 A
56
Not used.
-
57
Connector camper body interface.
10 A
58
269
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Fuses
Page 273 of 509

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
270
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Fuses
Page 274 of 509
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
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Page 281 of 509

GENERAL INFORMATION
Have your vehicle serviced regularly to help
maintain its roadworthiness and resale
value. There is a large network of
authorized dealers that are there to help
you with their professional servicing
expertise. We believe that their specially
trained technicians are best qualified to
service your vehicle properly and expertly.
They are supported by a wide range of
highly specialized tools developed
specifically for servicing your vehicle.
If your vehicle requires professional service,
an authorized dealer can provide the
necessary parts and service. Check your
warranty information to find out which
parts and services are covered.
Use only recommended fuels, lubricants,
fluids and service parts conforming to
specifications. Motorcraft® parts are
designed and built to provide the best
performance in your vehicle.
Precautions
•
Do not work on a hot engine.
• Make sure that nothing gets caught in
moving parts.
• Do not work on a vehicle with the
engine running in an enclosed space,
unless you are sure you have enough
ventilation.
• Keep all open flames and other burning
material (such as cigarettes) away
from the battery and all fuel related
parts.
Working with the Engine Off
1. Set the parking brake and shift the transmission to park (P).
2. Switch off the engine.
3. Block the wheels. Working with the Engine On 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.
1. Set the parking brake and shift the transmission to park (P).
2. Block the wheels.
OPENING AND CLOSING THE
HOOD
Opening the Hood 1. Pull the hood release lever.
278
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Page 283 of 509
UNDER HOOD OVERVIEW - 3.5L DURATEC
Air filter assembly.
A
Engine oil dipstick. See Engine Oil Dipstick (page 282).
B
Brake fluid reservoir.
See Brake Fluid Check (page 290).
C
Engine coolant reservoir. See
Engine Coolant Check (page 285).
D
Engine compartment fuse box. See
Fuses (page 263).
E
Battery connection. See
Jump Starting the Vehicle (page 251).
F
Engine oil filler cap.
See Engine Oil Check (page 282).
G
Washer fluid reservoir.
See Washer Fluid Check (page 294).
H
280
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EFGHE306489
Page 284 of 509
UNDER HOOD OVERVIEW - 3.5L ECOBOOST™
Air filter assembly.
A
Engine oil dipstick. See Engine Oil Dipstick (page 282).
B
Brake fluid reservoir.
See Brake Fluid Check (page 290).
C
Engine coolant reservoir. See
Engine Coolant Check (page 285).
D
Engine compartment fuse box. See
Fuses (page 263).
E
Battery connection. See
Jump Starting the Vehicle (page 251).
F
Engine oil filler cap.
See Engine Oil Check (page 282).
G
Washer fluid reservoir.
See Washer Fluid Check (page 294).
H
281
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing MaintenanceA
H
BD
EG
C
FE306483
Page 287 of 509

•
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.
284
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