relay FORD TRANSIT 2021 Owners Manual

TOWING A TRAILER
WARNING: Towing trailers
beyond the maximum
recommended gross trailer
weight exceeds the limit of your
vehicle and could result in engine
damage, transmission damage,
structural damage, loss of
vehicle control, vehicle rollover
and personal injury. WARNING:
Do not exceed
the GVWR or the GAWR
specified on the certification
label.
Note: See
Recommended
Towing Weights (page 235).
Your vehicle may have electrical
items, such as fuses or relays,
related to towing. See
Fuses
(page 263).
Your vehicle's load capacity
designation is by weight, not by
volume, so you cannot necessarily
use all available space when
loading a vehicle or trailer.
Towing a trailer places an extra
load on your vehicle's engine,
transmission, axle, brakes, tires
and suspension. Inspect these
components periodically during,
and after, any towing operation. Load Placement
To help minimize how trailer
movement affects your vehicle
when driving:
•
Load the heaviest items closest
to the trailer floor.
• Load the heaviest items
centered between the left and
right side trailer tires.
• Load the heaviest items above
the trailer axles or just slightly
forward toward the trailer
tongue. Do not allow the final
trailer tongue weight to go
above or below 10-15% of the
loaded trailer weight.
• Select a ball mount with the
correct rise or drop and load
capacity. When both the
loaded vehicle and trailer are
connected, the trailer frame
should be level, or slightly
angled down toward your
vehicle, when viewed from the
side.
When driving with a trailer or
payload, a slight takeoff vibration
or shudder may be present due to
the increased payload weight.
Additional information regarding
proper trailer loading and setting
your vehicle up for towing is
located in another chapter of this
manual. See
Load Limit (page
229).
You can also find information in
the
RV & Trailer Towing Guide
available at your authorized
dealer, or online.
234
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Towing

Protected Component
Fuse Rating
Item
Not used.
-
8
Rear door latch.
15 A
9
Not used.
-
10
Auxiliary power point.
40 A
11
USB port.
Horn.
20 A
12
Not used.
-
13
Vehicle power 5.
15 A
14
Not used.
-
15
Not used.
-
16
Right-hand high-intensity discharge headlamps.
10 A
17
Rear window defroster.
40 A
18
Front fog lamp.
20 A
19
Power folding mirrors.
10 A
20
Vehicle power 4.
15 A
21
Rear blower motor.
40 A
22
Fuel pump.
20 A
23
Run/Start relay.
40 A
24
Auxiliary power points.
40 A
25
Left-hand high-intensity discharge headlamps.
10 A
26
Not used.
-
27
Vehicle power 1.
20 A
28
Not used.
-
29
Coolant pump.
15 A
30
Anti-lock brake system.
5 A
31
Transmission control module.
15 A
32
Starter motor.
30 A
33
265
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Fuses

Protected Component
Fuse Rating
Item
Battery back-up sounder.
20 A
54
Transmission fluid pump.
25 A
55
Not used.
-
56
Not used.
-
57
Trailer socket.
30 A
58
Cooling fan relay.
-
59
Driver Compartment Fuse Box Protected Component
Fuse Rating
Item
USB port.
5 A
1
Not used.
-
2
USB port.
5 A
3
Not used.
-
4
267
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Fuses646566 6768
63
1
35 79
8
19
2021 22
313233 3435
36 3738 3940
23
2425 26
27 2829 30
6
4
2
10
41 4245
464748 49
56 5758 59 60 6162
74 75
69 707172 73
76 777879 8050
5152
53 5455
84 8586
81 8283
43
44
12
14 1618
17
15
13
11E296291

Protected Component
Fuse Rating
Item
Not used.
-
5
Not used.
-
6
Not used.
-
7
Not used.
-
8
Heated exterior mirrors.
10 A
9
Cooling fan.
5 A
10
Not used.
-
11
Not used.
-
12
Not used.
-
13
Not used.
-
14
Not used.
-
15
Rain sensor.
5 A
16
Not used.
-
17
Relay.
20 A
18
Not used.
-
19
Not used.
-
20
Heated rear window.
20 A
21
Heated rear window.
20 A
22
Auxiliary power point.
20 A
23
Auxiliary power point.
20 A
24
Not used.
-
25
Windshield wiper motor.
25 A
26
Not used.
-
27
Modified vehicle connections.
30 A
28
Fuel fired heater.
20 A
29
Power running boards.
30 A
30
Not used.
-
31
268
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.
-
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

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

Protected Component
Fuse Rating
Item
Not used.
5 A
30
Data link connector.
10 A
31
Remote key receiver.
Radio.
20 A
32
Not used.
-
33
Run/Start relay.
30 A
34 Parking aid.
Steering column.
Not used.
5 A
35
Parking aid.
15 A
36
Steering column control module.
Not used.
20 A
37
Power windows.
30 A
38
Passenger Compartment Fuse Box 273
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Fuses1
34
5 8
9 12
10
14 18
19
20 2122
23 24
15
16
67
11
13 17
2E296792

Protected Component
Fuse Rating
Item
Relay 2.
40 A
1
Relay 3.
40 A
2
Relay 1.
20 A
3
Relay 4.
20 A
4
Relay 5.
20 A
5
Not used.
-
6
Not used.
-
7
Relay 7.
20 A
8
Relay 8.
20 A
9
Not used.
-
10
Not used.
-
11
Relay 9.
20 A
12
Relay 6.
20 A
13
Ignition.
5 A
14
Power supply.
5 A
15
Auxiliary switch 3 relay.
20 A
16
Auxiliary switch 3 relay.
40 A
17
Auxiliary switch 3 relay.
40 A
18
Auxiliary switch 4 relay.
20 A
19
Auxiliary switch 5 relay.
20 A
20
Auxiliary fuse box relay.
20 A
21
Auxiliary switch 7 relay.
20 A
22
Auxiliary switch 8 relay.
20 A
23
Auxiliary switch 9 relay.
20 A
24
274
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Fuses

Protected Component
Fuse Rating
Item
Driver compartment fuse box.
150 A
12
Load shed relay.
190 A
13
Auxiliary power point 1.
175 A
14
Auxiliary power point 2.
60 A
15
CHANGING A FUSE
Fuses WARNING: Always replace a fuse
with one that has the specified
amperage rating. Using a fuse with a
higher amperage rating can cause severe
wire damage and could start a fire. If electrical components in the vehicle are
not working, a fuse may have blown. Blown
fuses are identified by a broken wire within
the fuse. Check the appropriate fuses
before replacing any electrical
components.
Fuse Types 276
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing FusesE217331 E207206

AUXILIARY SWITCHES
The auxiliary switchboard on the center
console makes aftermarket customization
easier, with four prewired switches
attached to the power distribution box for
electrical accessories. When using the auxiliary switches for an
extended period of time, we recommend
that the engine is running to prevent the
battery from running out of charge.
A fuse and relay kit is included with this
option. The kit contains fuses and relays
for the pre-fusebox, located under the
driver
’s seat. Refer to the instructions
included with the kit. See an authorized
dealer for service.
There is one power lead connector for each
switch. These can be found at either the
43-way connector for the AUX 1 and AUX
2 switches or the 6-way connector for the
AUX 3 and AUX 4 switches. Both
connectors are behind the passenger side
cup holder.
The relays are coded as follows: Fuse Rating
Wire Color
Circuit Number
20A
Yellow
CAC05
AUX 1 1
20A
Green with brown
trace
CAC06
AUX 2 1
40A
Blue with orange
trace
CAC13
AUX 3 1
40A
Yellow with orange
trace
CAC14
AUX 4 2
1 Operates when you switch the ignition on.
2 Operates only when the engine is running.
If different switch functionality is required
please contact the Truck Body Builders
Advisory Service. See Special Notices
(page 11).
443
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing AccessoriesE163431