Protected components
Relay location
Not used.
1
Not used.
2
Not used.
3
Daytime running lamps power relay.
4
Hydromax – brake on/off signal isolating relay.
5
Reverse lamps relay.
6
Starter ground relay.
7
Trailer tow parking lamps relay.
8
Fuse Holder Module
The fuse holder is next to the diode and
relay module. Protected components
Fuse amp rating
Fuse number
Break on/off relay feed (Hydromax
module).
10A
1
Brake transmission shift interlock.
10A
2
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Motorhome (TY3) Canada/United States of America, enUSA, First Printing FusesE224614
Protected components
Fuse amp rating
Fuse or relay number
Brake lamps feed.
10A*
8
Trailer brake control module
Not used.
—
9
Instrument cluster memory.
10A*
10
Wiper/washer module.
30A*
11
Wiper feed.
Not used.
—
12
Anti-lock brake system module –
Hydromax.
10A*
13
Anti-lock brake system module – Hydro-
boost.
10A*
14
Instrument cluster run/start.
Left-hand direction indicator feed.
15A*
15
Body builder battery (+12V) feed.
20A*
16
Body builder radio feed.
5A*
17
Not used.
—
18
Daytime running lamps relays.
5A*
19
Not used.
—
20
Right-hand direction indicator feed.
15A*
21
Trailer tow direction indicators.
20A*
22
Cluster run/accessory.
10A*
23
Not used.
—
24
Body builder right-hand low beam head-
lamp feed.
10A*
25
Not used.
—
26
Not used.
—
27
Not used.
—
28
Not used.
—
29
Not used.
—
30
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Motorhome (TY3) Canada/United States of America, enUSA, First Printing Fuses
Protected components
Fuse amp rating
Fuse or relay number
Body builder left-hand low beam head-
lamp feed.
10A*
31
Not used.
—
32
Body builder reverse lamp power.
10A*
33
Body builder reverse gear.
10A*
34
Trailer tow reverse lamps.
Body builder high beam feed.
20A*
35
High beam indicator.
Transmission control switch.
10A*
36
Not used.
—
37
Body builder off/run.
10A*
38
Not used.
—
39
Not used.
—
40
Instrument cluster lighting/switch illumin-
ation.
10A*
41
Not used.
—
42
Not used.
—
43
Not used.
—
44
Trailer tow right-hand direction indicator.
—
Relay 1
Trailer tow left-hand direction indicator.
—
Relay 2
Right-hand direction indicator.
—
Relay 3
Left-hand direction indicator.
—
Relay 4
Not used.
—
Relay 5
Daytime running lamps.
—
Relay 6
Parking brake.
Daytime running lamps on/off.
—
Relay 7
Not used.
—
Diode 1
Not used.
—
Diode 2
Not used.
—
F1
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Motorhome (TY3) Canada/United States of America, enUSA, First Printing Fuses
Protected components
Fuse amp rating
Fuse or relay number
Right low beam headlamp.
10A*
F7
Daytime running lamps relays.
5A*
F8
Left low beam headlamp.
10A*
F9
Transmission control switch.
10A*
F10
Cluster battery (+12V) #1.
10A*
F11
Not used.
—
F12
Cluster battery (+12V) #2.
10A*
F13
Switch illumination.
10A*
F14
Instrument cluster lighting.
Body builder battery (+12V) feed.
20A*
F15
Not used.
—
F16
Trailer tow direction indicators.
20A*
F17
Trailer tow stop lamps.
Trailer tow hazard lamps.
Body builder off/run.
10A*
F18
Trailer brake control module BOO signal.
10A*
F19
Body builder brake lamps.
Left/right brake lamps.
Body builder run/accessory feed.
10A*
F20
Anti-lock brake system module.
10A*
F21
Instrument cluster.
Wiper/washer module.
30A*
F22
Wiper feed.
Reverse lamps.
10A*
F23
Body builder radio feed.
5A*
F24
Trailer tow reverse lamps.
10A*
F25
Cluster run/accessory.
10A*
F26
High beam indicator.
20A*
F27
Daytime running lamps.
Micro relay
R1
Parking brake.
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Motorhome (TY3) Canada/United States of America, enUSA, First Printing Fuses
Protected components
Fuse amp rating
Fuse or relay number
Daytime running lamps on/off.
Micro relay
R2
Right-hand direction indicator.
Micro relay
R3
Trailer tow right-hand direction indicator.
Micro relay
R4
Left-hand direction indicator.
Micro relay
R5
Trailer tow left-hand direction indicator.
Micro relay
R6
Not used.
—
R7
Not used.
—
R8
Not used.
—
R9
Not used.
—
D1
Not used.
—
D2
Not used.
—
D3
* Mini fuse.
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.
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Motorhome (TY3) Canada/United States of America, enUSA, First Printing FusesE217331
Coolant Change
At specific mileage intervals, as listed in
the scheduled maintenance information,
the coolant should be changed. Add
prediluted coolant approved to the correct
specification. See Capacities and
Specifications (page 129).
Fail-Safe Cooling
Fail-safe cooling allows you to temporarily
drive your vehicle before any incremental
component damage occurs. The fail-safe
distance depends on ambient
temperature, vehicle load and terrain.
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 WARNINGS
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. Never remove the coolant reservoir
cap while the engine is running or hot.
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 a short period 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.
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Motorhome (TY3) Canada/United States of America, enUSA, First 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 higher a
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 pull off the road. You can continue to
drive your vehicle.
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. Pull off the road as soon as safely
possible and shift the transmission into
park (P).
2. Leave the engine running until the coolant temperature gauge needle
returns to the normal position. After
several minutes, if the temperature
does not drop, 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 WARNING
The dipstick cap and surrounding
components may be hot; gloves are
recommended.
Note:
Automatic transmission fluid
expands when warmed. To obtain an
accurate fluid check, drive the vehicle until
it is at normal operating temperature
(approximately 20 miles [30 km]). If your
vehicle has been operated for an extended
period at high speeds, in city traffic during
hot weather or pulling a trailer, the vehicle
should be turned off for about 30 minutes
to allow fluid to cool to normal operating
temperature 196°F - 215°F (91°C - 102°C)
before checking.
Refer to your scheduled maintenance
information for scheduled intervals for fluid
checks and changes.
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Motorhome (TY3) Canada/United States of America, enUSA, First Printing Maintenance
Chassis with gross vehicle weight ratings
of 20500 pounds (9299 kilograms),
22000 pounds (9979 kilograms), 24000
pounds (10886 kilograms) and 26000
pounds (11793 kilograms) are equipped
with Hydromax Brake Booster Systems
and must use Motorcraft DOT 5.1 Motor
Vehicle Brake Fluid or equivalent meeting
Ford Specification ESD-M6C57-A. See
Capacities and Specifications (page
129).
Add fluid up to the bottom of the rings
located at the top of the reservoir. Do not
fill above this line. •
Use only DOT 5.1 brake fluid that is
certified to meet Ford specifications.
• A clear gel-like substance in the
hydraulic brake master cylinder
reservoir may appear on some vehicles.
This substance is a silicone base
lubricant used during assembly of the
master cylinder. It will float on top of
the brake hydraulic fluid in the master
cylinder. This condition is normal and
in no way affects the operation of the
brake system. It does not require any
service.
• Brake system fluid should be replaced
on a regular basis to maintain optimum
braking performance, especially under
heavy-duty driving conditions such as
frequent steep grades or heavy towing
loads. See
Scheduled Maintenance
(page 136).
Hydroboost
Chassis with gross vehicle weight ratings
of 16000 pounds (7257 kilograms), 18000
pounds (8165 kilograms) and 19500
pounds (8845 kilograms) are equipped
with Hydroboost Brake Booster Systems
and must use Motorcraft High
Performance DOT 3 Motor Vehicle Brake
Fluid or equivalent meeting Ford
Specification WSS-M6C62-A.
Add brake fluid from a clean unopened
container until the level reaches MAX. Do
not fill above this line. Use only DOT 3
brake fluid that is certified to meet Ford
specifications.
Brake system fluid should be replaced on
a regular basis to maintain optimum
braking performance, especially under
heavy-duty driving conditions such as
frequent steep grades or heavy towing
loads. See
Scheduled Maintenance
(page 136).
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Motorhome (TY3) Canada/United States of America, enUSA, First Printing MaintenanceE161555