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Fuse/Relay
LocationFuse Amp
RatingFuse Description
110 30A** Wiper power relay (Park, Low/High speed)
111 30A** Body builder prep
112 40A** Blower motor
113 30A** Heated seats
114 25A** WABCO ABS battery feed (Hydraulic brake
vehicles only)
115 20A** Ignition switch, Central Junction Box fuses 8,
9, 10, 11, Starter motor relay
116 30A** Body builder prep
117 20A** Body builder prep/trailer socket stop
(Caterpillar and Cummins engines only)
118 60A** Hydraulic brake trailer two fuse block
119/120 60A** Hydraulic brake trailer two fuse block
Air brake trailer two fuse block
121/122 60A** HydroMax motor
Air brake trailer two fuse block
201 — Washer pump relay
202 — Wiper speed relay
203 — Wiper run/park relay
204 — Neutral start relay (6.0L Power Stroke engine
only)
Exhaust brake relay (Caterpillar and
Cummins engines only)
205 — RH stop/turn relay
206 — LH stop/turn relay
207 — Drain valve heater relay
208 — Back-up lamps relay
209 — Stoplamps relay
301 — Fuel heater/Fuel transfer pump relay
302 — Park lamps relay
303 — Blower motor relay
2006 F-650/750(f67)
Supplement
USA(fus)
Roadside Emergencies
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Fuse/Relay
LocationFuse Amp
RatingDescription
R2 — Trailer tow stop lamp relay
R3 — Trailer tow park/marker lamp relay
R4 — Trailer tow tail lamp relay
R5 — Not used
R6 — Not used
R7 — Trailer tow left turn/stop lamp relay
(combined)
Trailer tow left turn lamp relay (separate)
R8 — Trailer tow right turn/stop lamp relay
(combined)
Trailer tow right turn lamp relay (separate)
*Maxi fuse
Inline fuses
Your vehicle has two inline fuses located in/on the battery cables by the
battery. A 10A fuse for the transmission control module and a 40A fuse
for the engine control module. Refer toAutomatic transmissionin the
Drivingchapter andBatteryin theMaintenance and Specifications
chapter for more information.
JUMP STARTING
The gases around the battery can explode if exposed to flames,
sparks, or lit cigarettes. An explosion could result in injury or
vehicle damage.
Batteries contain sulfuric acid which can burn skin, eyes and
clothing, if contacted.
Do not attempt to push-start your vehicle. Automatic
transmissions do not have push-start capability; doing so may
damage the catalytic converter.
2006 F-650/750(f67)
Supplement
USA(fus)
Roadside Emergencies
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4. Tilt the hood forward until
stopped by the retaining cables.
To lower the hood:
1. Push the hood rearward at the top center of the hood above the grille
until closed.
2. Engage the latch on each fender.
3. Push down on the bottom of each latch until locked.
ENGINE OIL
Checking the engine oil level
Refer to theScheduled Maintenance Guidechapter for the appropriate
intervals for checking the engine oil. Check the engine oil level
consistently and accurately.
If your vehicle is equipped with a Cummins or Caterpillar engine,
refer to the appropriate engine operator’s manual for information on the
engine oil.
If your vehicle is equipped with the 6.0L Power Stroke engine,
perform the following procedure:
1. Start the engine and let it run until it reaches normal operating
temperature (the engine coolant temperature gauge indicator will be
near the center of the normal area between H and C).
2. Park the vehicle on level ground.
3. Set the parking brake and shift into N (Neutral) (automatic
transmission) or 1 (First) (manual transmission).
4. Turn off the engine and wait a few minutes for the oil to drain
completely into the oil pan.
2006 F-650/750(f67)
Supplement
USA(fus)
Maintenance and Specifications
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FUEL FILTER/WATER SEPARATOR
Do not drain water separator while engine is running. Fuel may
ignite if separator is drained while engine is running or vehicle is
moving.
The fuel filter/water separator removes any contaminated particles
and/or water from the fuel before the fuel enters the engine.
The fuel filter/water separator should be drained as recommended in the
Scheduled Maintenance Guidechapter.
DRAINING THE FUEL FILTER/WATER SEPARATOR – 6.0L POWER
STROKE ENGINE
Water should be drained whenever
the warning light comes on or every
5,000 miles (8,000 km).
1. Stop the vehicle andshut offthe engine.
2. Locate the drain valve and place
a suitable container at the end of
the drain tube.
3. Turn the drain valve to the drain position and allow water to drain out.
Note:Drain until the water/fuel mixture becomes only fuel.
4. Turn the drain valve to the closed position.
5. Restart the engine and check WATER IN FUEL indicator light; it
should not be illuminated. If it continues to illuminate, have the fuel
system checked and repaired.
WATER
IN
FUEL
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USA(fus)
Maintenance and Specifications
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REMOVAL
1. Using an oil filter wrench, remove the filter.
2. Carefully clean the mating surfaces.
INSTALLATION
1. Fill the filter with clean, fresh diesel fuel.
2. Coat the filter seal with clean, fresh diesel fuel.
3. Hand-tighten the filter until it seats firmly against the mount, then
tighten (by hand) an additional
1 3to1 2turn.
4. Start the engine and check for fuel leaks.
FUEL INFORMATION
Important safety precautions
Do not overfill the fuel tank. The pressure in an overfilled tank
may cause leakage and lead to fuel spray and fire.
The fuel system may be under pressure. If the fuel cap is venting
vapor or if you hear a hissing sound, wait until it stops before
completely removing the cap.
Automotive fuels can cause serious injury or death if misused or
mishandled.
Observe the following guidelines when handling fuel:
2006 F-650/750(f67)
Supplement
USA(fus)
Maintenance and Specifications
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•If your vehicle is equipped with a Caterpillar engine,the fuel
system must be primed before attempting to restart the engine. Refer
to the engine operator’s manual for instructions on priming the engine.
•Use caution not to overheat and damage the starterby cranking
the engine for an excessive period of time. You may need to crank the
engine for a longer time than normal. If the engine fails to start in 30
seconds, turn the ignition to the OFF position and wait for two
minutes before cranking the engine again.
•Any remaining trapped air will self-purge from the fuel system once
the engine starts running.
•The engine may run rough and produce white smoke while air is in
the fuel system. This is normal and should stop after a short period of
time.
FUEL CONSUMPTION IMPROVEMENT MEASURES
There are two important factors you can control to improve fuel
economy: the mechanical condition of your vehicle and how you drive it.
A properly maintained vehicle will deliver better performance than a
neglected vehicle. Always follow your maintenance schedule to keep your
vehicle in top operating condition.
Also, your driving habits have a significant influence on use of fuel. By
following these suggestions, you can stretch your fuel use:
•Avoid changes in speed as much as possible.
•Anticipate changing traffic conditions. Sudden stops and fast
acceleration waste fuel.
•Avoid extensive idling.
•Do not drive with your foot resting on the brake pedal.
Essentials of good fuel economy
Measuring techniques
Your best source of information about actual fuel economy is you, the
driver. You must gather information as accurately and consistently as
possible. Fuel expense, frequency of fill-ups or fuel gauge readings are
NOT accurate as a measure of fuel economy. We do not recommend
taking fuel economy measurements during the first 1,000 miles (1,600
km) of driving (engine break-in period). You will get a more accurate
measurement after 2,000–3,000 miles (3,000–5,000 km).
The advertised fuel capacity of the fuel tank(s) on your vehicle is equal
to the rated refill capacity of the fuel tank(s) as listed inFuel tanksin
2006 F-650/750(f67)
Supplement
USA(fus)
Maintenance and Specifications
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Maintenance Operation Frequency - Observation
Inspect the automatic slack
adjuster functionInsufficient power shown in loaded
practice stop.
Check the operation of the
brakes, the clutch, and the
steering
(1),(2)
Vehicle handling qualities not up to
par.
Inspect the vehicle for missing,
damaged, or mislocated noise
shieldsExcessive noise emanates from under
the cab or engine compartment.
Check the engine performance
and the engine governorExcessive engine noise.
Inspect the fan, the fan shroud,
and the fan clutchEngine overheats, fans runs at high
speed constantly, excessive fan noise,
or fan wobble due to worn bearings.
Check for operation of ABS
warning lampAt each engine start up.
Inspect the entire exhaust
system (including inlet pipe,
muffler, outlet pipe and all
exhaust clamps and fasteners)
for holes, leakage, breakage,
looseness and corrosive
damageExcessive noise or the smell of fumes
is experienced.
Inspect the engine air
induction system (including the
air ducts and the air filter) for
loose fitting, damaged or
missing componentsExcessive noise emanates from the
engine compartment.
Inspect the tires and check the
air pressure
(3)Poor steering, wandering or excessive
tire wear.
Balance the wheels and the
tiresVibration or abnormal tire wear
indicates imbalance.
Check the front end alignment
(3)Poor steering, wandering or excessive
tire wear.
Check the transmission and
engine mountings
(2)Hard shifting or excessive vibration.
Check and adjust transmission
controls
(2)High effort to shift or noisy
transmission.
2006 F-650/750(f67)
Supplement
USA(fus)
Scheduled Maintenance Guide
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