Page 4 of 208
These are some of the symbols you may see on your vehicle.
Vehicle Symbol Glossary
Safety Alert
See Owner’s Guide
Fasten Safety BeltAir Bag-Front
Air Bag-SideChild Seat
Child Seat Installation
WarningChild Seat Tether
Anchorage
Brake SystemAnti-Lock Brake System
Brake Fluid -
Non-Petroleum BasedTraction Control
Master Lighting SwitchHazard Warning Flasher
Fog Lamps-FrontFuse Compartment
Fuel Pump ResetWindshield Wash/Wipe
Windshield
Defrost/DemistRear Window
Defrost/Demist
Power Windows
Front/RearPower Window Lockout
Introduction
4
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 13 of 208

the anti-lock brake system is disabled and normal braking is still effective
unless the brake warning light also remains illuminated.
Wait to start
Indicates the air intake heater is in
operation and special starting
procedures are required. Refer to
theStartingchapter.
If equipped with an air
intake heater, DO NOT use
ether or any other starting fluids.
The use of starting fluids (ether)
in an engine equipped with an air
intake heater could result in
damage and/or personal injury.
Water in fuel (if equipped)
During refueling it is possible for
water-contaminated diesel fuel to be
pumped into your fuel tank. Your
vehicle fuel system is equipped with
a fuel filter/water separator to
remove water from the fuel. The
water in fuel indicator light
illuminates when the fuel
filter/water separator has a
significant quantity of water, or when the ignition key is switched to the
START position. If the light illuminates when the engine is running, stop
the vehicle as soon as safely possible, shut off the engine and drain the
filter bowl. Allowing water to stay in the system could result in extensive
damage to, or failure of, the fuel injection system.
To drain the fuel filter/water separator (refer toMaintenance and Care
section for procedure). Rotate the valve at the bottom of the filter
assembly allowing water to drain from the system. Close the valve upon
completion.
Do not drain water separator while engine is running. Fuel may
ignite if separator is drained while engine is running or vehicle is
moving.
WAIT
TO
START
WATER
IN
FUEL
Instrumentation
13
Page 118 of 208

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment
Fuse Panel Description
13 20A Radio, Cluster, 7.3L Power Stroke
Powertrain Control Module (PCM), Keep
Alive Memory
14 10A Interior Lamps
15 10A GEM, Interior Lamp Relay
16 15A Highbeams
17—Not Used
18 5A Headlamp switch, GEM
19 15A Engine, Cluster, Cummins PC M, CAT PCM,
7.3L Power Stroke PCM (Idle Valid Switch
Input)
20 15A Starter Relay, GEM
21 10A Daytime Running Lamps (DRL)
22 15A Not Used (Spare)
23 10A Electronic Flasher
24 15A Vacuum Pump, Air Dryer, ABS, Fuel Heater
Relay
25 10A Blower Motor Relay
26 10A Right Low Beam Headlamp
27—Not Used
28 10A Left Low Beam Headlamp
29 10A Cluster, GEM, 7.3L Power Stroke PCM
(clutch switch input), APCM (7.3L Power
Stroke only)
30 30A 7.3L Power Stroke PCM Diode, 7.3L Power
Stroke Fuel Heater
31 15A Allison MD Transmission, Neutral Start
Relay and PCM (7.3L Power Stroke only)
Relay 1—Interior Lamps
Relay 2—Not Used
Relay 3—Horn
Relay 4—One Touch Down
Relay 5—Not Used
Roadside emergencies
118
Page 121 of 208
Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box Description
112 40A** Blower Motor
113—Not Used
114—Not Used
115 40A** Ignition Switch (JB fuses 5, 8, 9, 11, 21)
116 30A** Body Builder Prep
117 20A** 7.3L Power Stroke PCM
118 30A** IDM (7.3L Power Stroke only)
119
12060A** Hydraulic ABS
121
12260A** Hydromax Motor
201—Washer Pump Relay
202—Wiper Speed Relay
203—Wiper Run/Park Relay
204—Cummins VP44 Relay/7.3L Power Stroke
Neutral Start Relay
205—Right Hand Stop/Turn Relay
206—Left Hand Stop/Turn Relay
207—Shift Modulator Relay
208—Backup Lamps Relay
209—Stop Lamps Relay
301—Fuel Heater Relay (CAT and Cummins
only)/7.3L Power Stroke PCM Relay
302—Park Lamps Relay
303—Blower Motor Relay
304—Air ABS Relay
401—Not Used
501—Not Used
502—Not Used
503 Diode 7.3L Power Stroke PCM Diode
* Mini Fuses ** Maxi Fuses
Roadside emergencies
121
Page 189 of 208

Maintenance Operation Frequency - Observation
Check the transmission and
engine mountings (*b)Hard shifting or excessive vibration
Check and adjust transmission
controls (*b)High effort to shift or noisy
transmission
Check fuel pump pressure Insufficient full-throttle power or
backfiring
Clean radiator cap seal. Clean
and inspect the cap surface on
the radiatorWhen the cap does not hold pressure
Check the battery terminals for
corrosionWhenever electrical power supply has
diminished
Tighten the wheel mounting
nuts to the specified torque.
Refer toServicing your
wheels and tiresRequired initially at 804 and 1 609 km
(500 and 1 000 miles). Perform again
at 804 and 1 609 km (500 and 1 000
mile) intervals after each tire
removal/replacement.
*a During maintenance and repair, protect the fuel tube and the hose
assemblies, the power steering lines, and the air brake lines from the
external heat, the acids and the abrasion that could damage the lines.
*b Check for (free) linkage action and ensure that (return) spring
force is adequate to maintain pedal free play.
*c Adjust, repair or replace as required with the same or equivalent
parts.
General maintenance information
189