2015 FORD F750 brakes

4. Make sure the coupler release lever is in the locked position.
5. Charge the trailer brake system. Set the trailer brakes, with either
the hand valve or tractor protection valve. Pull against the trailer for
an extra check of proper hook-up. Do not pull hard enough to
damage or strain the equipment.
6. Set the tractor parking brakes and fully raise the trailer landing gear.
See theBrakeschapter for proper operation of the parking brake
and trailer brakes.
7. Check the operation of all trailer lights and correct any lights that
may be faulty.
Un-hook
1. Try to keep the tractor and trailer in a straight line.
2. Apply the parking brakes.
3. Lower the trailer landing gear, making sure it is on solid, level
ground. The weight of the trailer is to be on the landing gear.
4. Block the trailer wheels.
5. Disconnect the brake hoses and light cords. Be sure hoses and cords
are clear.
6. Pull coupler release lever to disengage the fifth wheel jaws.
7. Release the tractor parking brakes.
8. Pull out from the trailer slowly, allowing the landing gear to take the
load gradually.
WRECKER TOWING
WARNING:To reduce the risk of personal injury or property
damage when manually releasing the spring brakes, be sure to
block the wheels so the vehicle cannot move once the brakes are
released.
Note:Make sure to connect your vehicle securely to the tow vehicle and
that the tow vehicle’s parking brakes are set before releasing the disabled
vehicle’s spring brakes.
Before moving the disabled vehicle, check for adequate road clearance of
vehicle components. If possible, unload the disabled vehicle before
towing. This reduces any abnormal load to the vehicle components
resulting from the towing procedures. Before towing, make sure to
release the parking brake fully. You can reset the spring-actuated type
parking brake by recharging the air system with at least 64 psi (441 kPa)
of air. If the brake system does not retain air pressure, then you must
release the spring brakes manually. SeeParking brakein theBrakes
chapter.
Towing171
2015 F-650/750(f67)
Owners Guide gf(ownloose), 1st Printing, December 2013
Canadian_French(fr_can)

DRIVING THROUGH WATER
If driving through deep or standing water is unavoidable, proceed very
slowly especially if you do not know the depth. Never drive through
water that is higher than the bottom of the hubs. Traction or brake
capability may be limited and your vehicle may stall. Water may also
enter your engine’s air intake and severely damage your engine, drive
axles or the transmission (through the breather ports).
Once through the water, always dry the brakes by moving your vehicle
slowly while applying light pressure on the brake pedal. Wet brakes do
not stop the vehicle as quickly as dry brakes.
176Driving Hints
2015 F-650/750(f67)
Owners Guide gf(ownloose), 1st Printing, December 2013
Canadian_French(fr_can)

Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
4 15A Windshield washer relay, Washer pump motor
5 5A Brake warning switch (hydraulic brake
vehicles only)
6 20A Upfitter switches (AUX 1 and AUX 3)
7 15A Brake pressure switches, ABS event relay
8 20A DEF (Urea) line heaters (diesel engine only)
9 20A Ignition switch, Starter cutoff
10 15A Air tank moisture removal valve
11 30A Electric trailer brake
12 20A Passenger compartment fuse box 5 and 21
13 15A Instrument cluster/Gateway module
14 20A Nitrogen oxide sensor (diesel engine only)
15 — Not used
16 5A Bendix® Air ABS
17 — Not used
18 10A Fuel transfer pump
19 15A Powertrain control module power 1 (gasoline
engine only)
20 10A Powertrain control module power 2 (gasoline
engine only)
21 20A Powertrain control module power 3 (gasoline
engine only)
22 20A Powertrain control module power 4 (gasoline
engine only)
23 — Not used
24 10A Powertrain control module keep-alive power
(gasoline engine only)
101 30A Bendix Air ABS relay (Air brake vehicles
only)
Hydraulic brakes module (hydraulic brake
vehicles only)
102 20A Ignition switch
Fuses189
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Owners Guide gf(ownloose), 1st Printing, December 2013
Canadian_French(fr_can)

Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
209 — Auxiliary stop lamp relay
301 — Fuel heater/Fuel transfer pump relay (diesel
engine only)
— Fuel pump module (gasoline engine only)
302 — Body builder relay, parking lamps relay
303 — Blower motor relay
304 — DEF (Urea) line heaters relay (diesel engine
only)
— Powertrain control module power VPWR1
(gasoline engine only)
Individual Maxi Fuse Holder in Engine Compartment
Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
9925 30A Hydraulic brakes pump motor 1
Fuses191
2015 F-650/750(f67)
Owners Guide gf(ownloose), 1st Printing, December 2013
Canadian_French(fr_can)

Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
16 15A High beams, Indicator
17 — Not used
18 5A Dimmer switch, Interior lighting
19 15A Engine control (diesel engine only)
20 5A Starting system
21 10A DRL resistor
22 15A Air horn, Air suspension dump, Two-speed
axle, Driver-controlled locking differential
23 10A Flasher relay
24 15A Hydraulic brakes relay, Fuel heater relay
(diesel engine only), Air dryer
25 10A Blower motor relay coil
26 10A Right-hand low beam headlight
27 — Not used
28 10A Left-hand low beam headlight
29 10A Cluster, GEM
30 15A Allison electronic transmission
31 15A Mirror fold relay
Relay 1 — Interior lamps
Relay 2 — Not used
Relay 3 — Horn
Relay 4 — Not used
Relay 5 — Not used
Fuses193
2015 F-650/750(f67)
Owners Guide gf(ownloose), 1st Printing, December 2013
Canadian_French(fr_can)

Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
4 30A* Trailer tow turn/stop lamps (combined)
Trailer tow turn lamps (separate)
5 — Not used
R1 — Trailer tow ABS relay (non electric trailer
brake vehicles only)
R2 — Trailer tow marker lamp relay
R3 — Trailer tow stop lamp relay
R4 — Trailer tow tail lamp relay
R5 — Not used
R6 — Not used
R7 — Trailer tow left turn lamp relay
R8 — Trailer tow right turn lamp relay
*Maxi fuse
Inline Fuses
Your vehicle may have several inline fuses located in, or on, the battery
cables located in the battery box (depending on application).
•All vehicles equipped with an Allison transmission have a 10 amp fuse
located in the clean power cables located in the battery box.
•All vehicles have a 30 amp fuse located in the clean power cables
located in the battery box.
•All vehicles equipped with hydraulic brakes have a 40 amp fuse
located in the clean power cables located in the battery box. In
addition, another 30 amp fuse is located in a fuse holder just above
the power distribution center located in the vehicle’s engine
compartment.
196Fuses
2015 F-650/750(f67)
Owners Guide gf(ownloose), 1st Printing, December 2013
Canadian_French(fr_can)

GENERAL INFORMATION
WARNING:Making modifications to various parts, components
and systems of the vehicle, such as brake and steering systems,
can adversely affect the quality, reliability and operation of your vehicle
and could result in property damage, personal injury or death. Such
modifications must be avoided.
WARNING:Failure to properly perform maintenance and
servicing procedures could result in vehicle damage, personal
injury or death.
WARNING:Take care when performing any maintenance,
system check or service on your vehicle. Some of the materials
may also be hazardous if used, serviced or handled improperly and
could result in property damage, personal injury or death.
Always use care when performing vehicle maintenance, repairs or system
checks. Improper or incomplete service could result in your vehicle not
working properly which may result in personal injury or damage to your
vehicle or equipment. It is the operator’s responsibility to see that your
vehicle receives proper care and maintenance. If you have any questions
about performing service, have the service done by a qualified
technician.
Servicing Guidelines
When servicing your vehicle:
•Always wear safety glasses for eye protection.
•Always set the parking brake or chock the wheels.
•Always use support stands, not a jack, when working under a raised
vehicle.
•Always turn off the ignition unless a procedure requires the engine to
be running.
•Always avoid contact with hot metal parts. Allow the components to
cool before working with, or around, them.
•Always operate the engine in a well-ventilated area.
•Do not wear loose-fitting clothing, hanging jewelry, watches or rings.
•Do not smoke.
•Do not work on the brakes or the clutch unless you take the proper
precautions to avoid inhaling friction material dust.
Maintenance197
2015 F-650/750(f67)
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Canadian_French(fr_can)

WARNING:
1. Always wear a respirator approved by the National Institute of
Occupational Studies of Health (NIOSH) or Mine Safety and Appliance
(MSA) during all brake service procedures. Wear the respirator from
removal of the wheels through assembly.
2.Neveruse compressed air or dry brushing to clean brake parts or
assemblies.
3. Clean brake parts and assemblies in open air. During assembly,
carefully place all parts on the floor to avoid getting dust in the air. Use
an industrial vacuum cleaner with a HEPA filter system to clean dust
from the brake drums, backing plates and other brake parts. After using
the vacuum, remove any remaining dust with a rag soaked in water and
wrung until nearly dry.
4.Neveruse compressed air or dry sweeping to clean the work area.
Use an industrial vacuum cleaner with a HEPA filter system and rags
soaked in water and wrung until nearly dry. Dispose of used rags with
care to avoid getting dust in the air. Use an approved respirator when
emptying vacuum cleaners and handling used rags.
5.Worker clean-up:Wash your hands before eating, drinking or
smoking. Vacuum your work clothes after use and then launder them
separately, without shaking them, to prevent fiber dust getting into the
air.
Your vehicle is equipped with non-asbestos brake linings. However,
exposure to excessive amounts of brake material (whether asbestos or
non-asbestos, fiberglass, mineral wool, aramid or carbon) may be a
serious health hazard.
Air Brakes
WARNING:Do not manually adjust the automatic slack adjusters
to correct excessive push rod stroke as it may result in reduced
brake effectiveness and a vehicle crash. Excessive push rod stroke
indicates that a problem exists with the automatic adjuster, with the
installation of the adjuster, or with foundation brake components that
manual adjustment does not remedy. Seek service from a qualified
facility for excessive push rod stroke.
Maintenance201
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Owners Guide gf(ownloose), 1st Printing, December 2013
Canadian_French(fr_can)