Page 177 of 386
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 Fuse Type
Callout
Micro 2
A
Micro 3
B
Maxi
C
Mini
D
174
F650750 (TBC) , enUSA, Edition date: 201708, First Printing FusesE217331 E207206
Page 178 of 386
Fuse Type
Callout
M Case
E
J Case
F
J Case Low Profile
G
175
F650750 (TBC) , enUSA, Edition date: 201708, First Printing Fuses
Page 180 of 386

Engine compartment (with engine off)
Inspect for glazing, fraying or cracking. There should be no
more than 5-7 cracks per rib, per 1 in (2.5 cm)
Belts (fan, alternator,
water pump and air
conditioning
compressor)
Inspect for signs of fluid puddles or dripping fluid on the
ground under the engine, or the underside of the engine.
Fluid leaks
Inspect for debris that may have collected on the HVAC air
inlet grille or inside the exterior module as this may reduce
system performance.
HVAC air inlet Engine starting (with parking brake applied)
Before entering the cab, verify that the vehicle is equipped
with spare electrical fuses (if used), three red reflective
triangles, a properly charged and rated fire extinguisher and
wheel chocks.
Safety and emergency
equipment
Walk around the vehicle and verify all steps and grab handles,
inside and out (as well as behind), are tight and clean. Use
extreme caution and a three-point stance at all times.
Inspect door latches for proper closing, latching and locking.
Set the parking brake. Make sure the gearshift lever is in
neutral (N) or park (P) (if equipped with a park position).
Starting the engine
Diesel engine:
Turn the key to the on position. Turn the key
to start when the wait to start indicator light in the instrument
cluster turns off.
Gasoline engine:
Turn the key to start, and then release it
as soon as the engine starts.
Verify pressure builds to normal operating range.
Engine oil pressure
A tone indicating low air pressure should sound immediately
after the engine starts but before the compressor has built-
up pressure. The tone should stop when the air pressure
reaches
70 psi (483 kPa). Let the air pressure build to
governed cutout pressure, which should occur between
115– 130 psi (793–896 kPa)
.
Low air pressure warning
tone (if equipped with an
air compressor)
Press the accelerator and verify that it operates smoothly,
without any binding or irregular feel. Release the pedal and
verify the engine returns to idle speed immediately.
Accelerator
177
F650750 (TBC) , enUSA, Edition date: 201708, First Printing Vehicle Inspection Guide
Page 191 of 386

UNDER HOOD OVERVIEW - 6.7L DIESEL
Windshield washer fluid reservoir. See Washer Fluid Check (page 206).
A
Secondary Cooling System Reservoir. See Engine Coolant Check (page 194).
B
Engine coolant reservoir. See
Engine Coolant Check (page 194).
C
Automatic transmission fluid dipstick. See
Automatic Transmission Fluid
Check (page 203).
D
Secondary fuel filter. See
Draining the Fuel Filter Water Trap (page 206).
E
Engine oil separator. See Changing the Engine Oil and Oil Filter (page 192).
F
Brake fluid reservoir. See
Brake Fluid Check (page 205).
G
Engine compartment fusebox. See
Fuses (page 165).
H
Power steering fluid reservoir. See
Power Steering Fluid Check (page 205).
I
Air brake compressor. See
Brake System Inspection (page 223).
J
Engine oil filler cap. See
Engine Oil Check (page 190).
K
Engine oil dipstick. See
Engine Oil Dipstick (page 190).
L
Air cleaner assembly. See
Changing the Engine Air Filter (page 213).
M
188
F650750 (TBC) , enUSA, Edition date: 201708, First Printing MaintenanceABD
IJKLM
FEGH
E209131C
Page 192 of 386
UNDER HOOD OVERVIEW - 6.8L
Windshield washer fluid reservoir. See Washer Fluid Check (page 206).
A
Engine coolant reservoir. See
Engine Coolant Check (page 198).
B
Automatic transmission fluid dipstick. See
Automatic Transmission Fluid
Check (page 203).
C
Brake fluid reservoir. See
Brake Fluid Check (page 205).
D
Engine compartment fusebox. See
Fuses (page 165).
E
Power steering fluid reservoir. See
Power Steering Fluid Check (page 205).
F
Engine oil dipstick. See
Engine Oil Dipstick (page 190).
G
Engine oil filler cap. See
Engine Oil Check (page 191).
H
Air cleaner assembly. See
Changing the Engine Air Filter (page 217).
I
189
F650750 (TBC) , enUSA, Edition date: 201708, First Printing MaintenanceABC
FGHI
DE
E209130
Page 196 of 386

Engine lubrication for severe
service operation
The following conditions define severe
operation for which engine operation with
SAE 5W-40 API CJ-4 is recommended. Oil
and oil filter change intervals will be
determined by the Intelligent Oil Life
Monitor™ as noted previously.
•
Frequent or extended idling (over 10
minutes per hour of normal driving).
• Low-speed operation/stationary use.
• If vehicle is operated in sustained
ambient temperatures below -9°F
(-23°C) or above 100°F (38°C).
• Frequent low-speed operation,
consistent heavy traffic less than
25 mph (40 km/h)
.
• Operating in severe dust conditions.
• Operating the vehicle off road.
• Towing a trailer over
1,000 mi
(1,600 km).
• Sustained, high-speed driving at Gross
Vehicle Weight Rating (maximum
loaded weight for vehicle operation).
• Use of fuels with sulfur content other
than ultra-low sulfur diesel (ULSD).
• Use of high-sulfur diesel fuel.
CHANGING THE COALESCER
FILTER ELEMENT
(If Equipped) WARNING
Do not dispose of engine oil or oil
filters in the household refuse or the
public sewage system. Use an
authorized waste disposal facility. Do not clean or recondition the filter
element. We recommend that you demand the use
of genuine Ford and Motorcraft® parts
whenever your vehicle requires scheduled
maintenance or repair. Use the correct
specification filter element. See
Motorcraft Parts
(page 257).
Note: Operating your vehicle without a filter
element or with an unapproved filter
element may result in damage to the turbo
charger or exchanger and could lead to
engine damage that may not be covered by
the vehicle Warranty. Filter cover.
A
Filter element.
B
Filter housing.
C
1. Clean the filter cover and remove the bolts.
2. Carefully remove the filter cover.
3. Remove used filter element from the filter housing and carefully dispose of
it.
193
F650750 (TBC) , enUSA, Edition date: 201708, First Printing MaintenanceE211403
A
B
C
Page 221 of 386

5. Remove the clips that secure the air
filter housing cover. Push the air filter
cover toward the center of the vehicle
and up slightly to release it.
6. Remove the air filter element from the
air filter housing.
7. Install the new air filter element.
8. Engage the clips to secure the air filter housing cover to the air filter housing.
Be careful not to crimp the filter
element edges between the air filter
housing and cover. Ensure that you
align the tabs on the edge properly into
the slots.
9. Slip the air tube onto the air filter housing and tighten the air-tube clamp
bolt snugly. Do not over tighten
air-tube clamp bolt. 10. Reconnect the mass air flow sensor
electrical connector to the outlet
tube. Make sure the locking tab on
the connector is in the locked position
(connector shown from below for
clarity).
CHANGING THE ENGINE-
MOUNTED AND DIESEL FUEL
CONDITIONER MODULE FUEL
FILTERS WARNING
Do not dispose of fuel in the
household refuse or the public
sewage system. Use an authorized
waste disposal facility. Your vehicle has two fuel filters. The first
filter mounts on top of the engine on the
left-hand side. The second filter is inside
the diesel fuel conditioner module. The
module is mounted between the outboard
side of the fuel tank and the frame rail.
Note:
The module is at the front of the fuel
tank or at the front of the aft-axle fuel tank
on some models.
218
F650750 (TBC) , enUSA, Edition date: 201708, First Printing MaintenanceE207259
x3 E163760
Page 320 of 386
Each switch includes a power lead, a
blunt-cut and sealed wire located below
the instrument panel and to the left of the
steering column.
The power leads are coded as shown: Fuse
Amp
Rating
Wire
Color
Circuit
Number
Switch
25A
Yellow
CAC05
AUX 1
25A
Green
with
Brown Trace
CAC06
AUX 2
10A
Violet
with
Green Trace
CAC07
AUX 3
15A
Brown
CAC08
AUX 4
Learn more about auxiliary switches
by visiting: Web Address
www.fleet.ford.com/truckbbas/
317
F650750 (TBC) , enUSA, Edition date: 201708, First Printing AccessoriesE163432 E209714