Page 278 of 509
Pre-fuse Box
Protected Component
Fuse Rating
Item
Body control module.
125 A
1
Electronic power assist steering.
80 A
2
Not used.
-
3
Not used.
-
4
Not used.
-
5
Passenger compartment fuse box.
150 A
6
Camper.
60 A
7
Not used.
-
8
Starter motor.
500 A
9
Alternator.
Engine compartment fuse box.
300 A
10
Dual generators.
250 A
11
275
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15
13
9
10
11
12
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2
3
4
5
6
7E296043
Page 279 of 509
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
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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
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Page 446 of 509

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
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Page 499 of 509

Tow Hitch..............................................................
240
Trailer Brakes....................................................... 240
Trailer Lamps....................................................... 244
Trailer Towing Connector................................ 239
When Towing a Trailer..................................... 244
Event Data.........................................................15
Export Unique Options.............................460
Exterior Mirrors
..............................................108
Fold-Away Exterior Mirrors............................. 109
Power Exterior Mirrors...................................... 108
Power Folding Mirrors....................................... 108
F
Fan See: Engine Cooling Fan................................. 285
Fastening the Seatbelts..............................44 Seatbelt Locking Modes.................................... 45
Using Seatbelts During Pregnancy................44
Flat Tire See: Changing a Road Wheel....................... 339
Flat Tire Inflation See: Tire Sealant and Inflator Kit.................. 312
Floor Mats
.......................................................247
Fog Lamps - Front See: Front Fog Lamps...................................... 104
Ford Credit.....................................................256 US Only.................................................................. 256
Ford Protect..................................................444 Ford Protect Extended Service Plan
(CANADA ONLY).......................................... 445
Ford Protect Extended Service Plans (U.S. Only)................................................................. 444
Front Fog Lamps
..........................................104
Front Fog Lamp Indicator................................ 105
Switching the Front Fog Lamps On or Off....................................................................... 104
Front Parking Aid...........................................187 Front Parking Aid Information
Messages.......................................................... 189
Object Distance Indicator............................... 188
Front View Camera.....................................225 Using the Front View Camera....................... 226
Front Wiper Blades See: Changing the Front Wiper Blades......295
Fuel and Refueling........................................151
Fuel Filler Funnel Location........................153
Fuel Filter
........................................................294 Fuel Quality - E85..........................................151
Choosing the Right Fuel - Flex Fuel
Vehicles.............................................................. 151
Switching Between E85 and Gasoline............................................................. 152
Fuel Quality - Gasoline...............................153 Choosing the Right Fuel................................... 153
Fuel Shutoff
..................................................250
Ignition Switch.................................................... 250
Keyless Starting................................................... 251
Fuse Box Locations
.....................................263
Body Control Module....................................... 263
Driver Compartment Fuse Box..................... 263
Engine Compartment Fuse Box................... 263
Passenger Compartment Fuse Box............263
Pre-fuse Box........................................................ 263
Fuses................................................................263
Fuse Specification Chart..........................264 Body Control Module......................................... 271
Driver Compartment Fuse Box..................... 267
Engine Compartment Fuse Box................... 264
Passenger Compartment Fuse Box............273
Pre-fuse Box......................................................... 275
G
Gauges..............................................................110 Automatic Transmission Position
Indicators............................................................ 111
Engine Coolant Temperature Gauge.............111
Fuel Gauge.............................................................. 111
Information Display............................................ 110
Instrument Cluster.............................................. 110
Speedometer......................................................... 111
Tachometer........................................................... 110
Gearbox See: Transmission............................................... 161
General Information on Radio Frequencies...................................................63
General Maintenance Information
.......446
Multi-point Inspection..................................... 448
Owner Checks and Services.......................... 447
Protecting Your Investment.......................... 446
Why Maintain Your Vehicle?......................... 446
Why Maintain Your Vehicle at Your Dealership?.................................................... 446
Getting Assistance Outside the U.S. and Canada.........................................................259
496
2021 Transit (TTH) Canada/United States of America, MK3J 19A321 AA enUSA, Edition date: 202010, Second-Printing Index