Page 10 of 208

WARNING LIGHTS AND CHIMES
Air clean warning (if equipped)
Illuminates when the ignition is
turned to the ON position and the
engine is off. The light also
illuminates when the air system is
restricted (dirty, clogged).
Brake reserve system warning (if equipped)
Illuminates to indicate normal
Hydromax booster reserve system
activation when the engine is OFF
and the service brake pedal is
applied, or when the ignition is in
the ON or START position.
This light may also illuminate momentarily if the engine is running and
the driver turns the steering wheel fully in one direction while braking.
If the light remains on while the engine is running, this indicates
inadequate hydraulic booster pressure or reserve pump system failure.
Stop the vehicle safely as soon as possible and seek service immediately.
Charging system
Illuminates when the ignition is
turned to the ON position and the
engine is off. The light also
illuminates when there is no
alternator output, or an over voltage
condition requiring electrical system service.
BRAKE
0
000000000
MPH20km/h
406080
100
120
140
160
010 20304050
60
70
80
90
100
TRAILERWATER
IN
FUELWAIT
TO
START
STOP
ENGINE
ENGINE
PROTECT
AIR
CLEAN
CHECK
TRANSRANGE
INHIBITSERVICE
ENGINE
SOONCRUISE
LEF
H
RPM1000
DIESEL FUEL ONLY
X012
3
4PRN 218C 18
H
D
BRAKEBRAKE
AIR
CLEAN
BRAKE
Instrumentation
10
Page 93 of 208

Trailer brake
During normal operation, the trailer brakes operate whenever the tractor
brakes are applied. A manual control lever is provided so the trailer
brakes can be applied separately, if required. To apply the trailer brakes,
pull the trailer brake control downward to the APPLIED position.
Do not use the trailer brake manual control lever for parking.
Trailer air supply control (MV-3) (Tractor package)
The MV-3 control module is a two-button, push-pull control valve housed
in a single body which includes a dual circuit supply valve and a check
valve.
Operation
During initial charge, with the system completely discharged, both
buttons are out.
When system pressure reaches
448 kPa (65 psi), the red control
(trailer supply) may be pushed in
and should stay in, charging the
trailer system and releasing the
trailer brakes.
The yellow control (parking brake)
may now be pushed in, which will
supply air to the tractor spring
brakes, releasing them.
TRAILER
AIR SUPPLY
NOT FOR PARKING
PULL
TO
TOEVACUATE
PUSH
SUPPLY
PARKING
BRAKE
PULL
TOAPPLY
PUSH
TORELEASE
Driving
93
Page 141 of 208

•Battery tray with cover removed.
Motorcraft maintenance-free batteries do not normally require adding
additional water. However, for severe usage or in high temperature
climates, check the battery electrolyte levels. Refer to the Scheduled
Maintenance Guide for the service interval schedules.
Keep the electrolyte level in each cell up to the “level indicator”.
Do not overfill the battery cells.
If the electrolyte level in the battery is low, you can add plain tap water
to the battery, as long as you do not use hard water (water with a high
mineral or alkali content). If possible, however, try to only fill the battery
cells with distilled water. If the battery needs water often, have the
charging system checked.
Make sure the battery cover/shield is reinstalled after the battery
has been cleaned or replaced.
For longer, trouble-free operation, keep the top of the batteries clean
and dry. Also, make certain the battery cables are always tightly fastened
to the battery terminals.
If you see any corrosion on the battery or terminals, remove the cables
from the terminals and clean with a wire brush. You can neutralize the
acid with a solution of baking soda and water.
Maintenance and care
141
Page 206 of 208

calculating
fuel economy ...................112,157
choosing the right fuel ...........152
filling your vehicle with fuel ..151
filter, specifications .........154,155
gauge .........................................16
improving
fuel economy ...................112,157
safety information relating to
automotive fuels .....................151
Fuses ...................................115,116
Gas mileage
(see Fuel economy) ..........112,157
Gauges .........................................16
battery voltage gauge ...............18
engine coolant
temperature gauge ...................16
engine oil pressure gauge ........19
fuel gauge ..................................16
odometer ...................................17
speedometer .............................17
tachometer ................................18
trip odometer ............................18
Hazard flashers .........................115
Headlamps ...................................20
aiming ......................................163
daytime running lights .............20
flash to pass ..............................50
high beam ............................12,50
turning on and off ....................20
warning chime ..........................15
Heating ........................................21
heater only system ...................21
heating and
air conditioning system ............23
Hood ..........................................126
Ignition
positions of the ignition ...........49
removing the key ....................101
Infant seats
(see Safety seats) ..................72,73Instrument panel
cleaning ...................................166
cluster ......................................167
lighting up
panel and interior .....................20
location of components ............10
Jump-starting your vehicle ......125
Keys
key in ignition chime ...............15
positions of the ignition ...........49
removing from the ignition ....101
Lamps
cargo lamps ...............................20
daytime running light ...............20
headlamps .................................20
headlamps, flash to pass ..........50
instrument panel, dimming .....20
replacing bulbs ..159,160,161,162
Lane change indicator
(see Turn signal) ........................49
Lights, warning and indicator ....10
anti-lock brakes (ABS) .......12,83
brake .....................................10,11
charging system ........................10
check coolant ............................14
high beam .................................12
safety belt .................................14
service engine soon ..................14
turn signal indicator .................12
Lubricant specifications ...........169
Maintenance and Care ..............179
Manual transmission ...................97
Mirrors .........................................57
Odometer .....................................17
Parking brake ....................85,87,90
Power distribution box
(see Fuses) ...............................119
Power door locks ........................56
Power steering .......................95,96
fluid, checking and adding ....136
Radio ............................................26
Refill capacities for fluids ........168
Index
206