1998 FORD EXPEDITION suspension

oil pressure gaugein this chapter
for more information.
Four wheel drive low
(if equipped)
Illuminates when four-wheel drive
low is selected.
Four wheel drive indicator
(if equipped)
Illuminates when 4x4 range is
selected.
Automatic four wheel drive
indicator (if equipped)
Illuminates when A4WD
(automatic 4±wheel drive) is
engaged.
Check air suspension
Illuminates momentarily when the
ignition is turned to the ON
position and the engine is OFF.
The light also illuminates when the
air suspension system requires
servicing.
For information on the air
suspension system, refer to the
Drivingchapter.
LOW
RANGE
4x4
A4WD
CHECK
SUSP
Instrumentation
11

steering assist will decrease to
improve steering feel. At lower
speeds, maneuverability will be
increased.
If the amount of effort required to
steer your vehicle changes at a
constant vehicle speed, have the
power steering system checked by
your dealer or a qualified service
technician.
AIR SUSPENSION SYSTEM
(IF EQUIPPED)
The air suspension system is
designed to improve ride, handling
and general vehicle performance
for static, on and off-road driving
conditions.
²The load leveling feature of the
air suspension automatically
keeps the vehicle at a constant
level if a load is added or
removed from the vehicle.
²The height adjustment feature
automatically controls the
vehicle height over a range of
approximately 5 cm (2 inches)
based on vehicle speed, ignition
position and selection of two or
four-wheel drive modes.
Driving
102

The air suspension shut-off switch
is located behind an access panel
underneath the passenger side
instrument panel.
On vehicles equipped with
Air Suspension, turn OFF
the Air Suspension switch prior
to jacking, hoisting or towing
your vehicle.
Normal vehicle operation does not
require any action by the driver.
TRACTION-LOK AXLE (IF
EQUIPPED)
This axle provides added traction
on slippery surfaces, particularly
when one wheel is on a poor
traction surface. Under normal
conditions, the Traction-Lok axle
functions like a standard rear axle.
Extended use of other than the
manufacturer's specified size tires
on a Traction-Lok rear axle could
result in a permanent reduction in
effectiveness. This loss of
effectiveness does not affect
normal driving and should not be
noticeable to the driver.
To avoid injury, never run
the engine with one wheel
off the ground, such as when
changing a tire.
AIR SUSPENSION
SWITCH
INTERRUPTEUR DE
LA SUSPENSION
PNEUMATIQUE
OFF
Driving
103

Trailer towing with your vehicle
may require the use of a trailer
tow option package.
Trailer towing puts additional loads
on your vehicle's engine,
transmission, axle, brakes, tires,
and suspension. For your safety
and to maximize vehicle
performance, be sure to use the
proper equipment while towing.
Follow these guidelines to ensure
safe towing procedure:
²Stay within your vehicle's load
limits. If exceeded, cargo should
be removed from the trailer
and/or the vehicle until all
weights are within specified
limits.
²Thoroughly prepare your vehicle
for towing. Refer toPreparing
to towin this chapter.
²Use extra caution when driving
while trailer towing. Refer to
Driving while you towin this
chapter.
²Service your vehicle more
frequently if you tow a trailer.
Refer to the severe duty
schedule in the ªService Guideº.
²Do not tow a trailer until your
vehicle has been driven at least
800 km (500 miles).
²Refer to the instructions
included with towing accessories
for the proper installation and
adjustment specifications.
Driving
118

is properly attached to your
vehicle. See your dealer or a
reliable trailer dealer if you require
assistance.
If your vehicle is not equipped
with the factory heavy duty trailer
tow option, auxiliary coolers are
recommended for the automatic
transmission system if you are
planning on:
²traveling farther than 80 km
(50 miles)
²towing in hilly terrain
²towing frequently
Hitches
Do not use hitches that clamp onto
the vehicle's bumper or attach to
the axle. You must distribute the
load in your trailer so that 10 to
15% of the total weight of the
trailer is on the tongue.
Load equalizing hitch
When hooking up a trailer using a
load equalizing hitch, always use
the following procedure:
1. Park the unloaded vehicle on a
level surface. With the ignition on
and all doors closed, allow the
vehicle to stand for several
minutes so that it can level.
2. Turn the air suspension (if
equipped) control to OFF.
3. Measure the height of a
reference point on the front and
rear bumpers at the center of the
vehicle.
Driving
121

4. Attach the trailer to the vehicle
and adjust the hitch equalizers so
that the front bumper height is
within 0±13 mm (0.5 in) of the
reference point. After proper
adjustment, the rear bumper
should be no higher than in Step 3.
5. Turn the air suspension (if
equipped) control to ON.
Adjusting an equalizing
hitch so the rear bumper
of the vehicle is lower or higher
than it was unloaded will defeat
the function of the load
equalizing hitch and may cause
unpredictable handling.
Safety chains
Always connect the trailer's safety
chains to the vehicle. To connect
the trailer's safety chains, cross the
chains under the trailer tongue and
allow slack for turning corners.
If you use a rental trailer, follow
the instructions that the rental
agency gives to you.
Trailer brakes
Electric brakes and manual,
automatic or surge-type brakes are
safe if installed properly and
adjusted to the manufacturer's
specifications. The trailer brakes
must meet local and Federal
regulations.
Driving
122

Fuse/Relay
LocationFuse Amp
RatingDescription
5 15A Digital Transmission Range (DTR)
Sensor, Daytime Running Lamps
(DRL) Module, Speed Control
Servo/Amplifier Assembly,
Heater-A/C Control Assembly,
Blend Door Actuator, Electronic
Variable Orifice (EVO) Module
6 5A Shift Lock Actuator, Generic
Electronic Module (GEM), 4
Wheel Air Suspension (4WAS)
Module, Compass Sensor, Steering
Wheel Rotation Sensor, Heated
Grid Relay, Overhead Trip
Computer (OTC) Module
7 5A Auxiliary A/C Relay, Console
Blower Motor
8 5A Radio, Main Light Switch, Remote
Anti-Theft Personality (RAP)
Module
9 Ð Not Used
10 Ð Not Used
11 30A Washer Pump Relay, Wiper
Run/Park Relay, Wiper Hi/Lo
Relay, Windshield Wiper Motor,
Rear Wiper Pump Relay
12 5A Data Link Connector (DLC)
13 15A Brake On/Off (BOO) Switch,
Brake Pressure Switch
14 15A Battery Saver Relay, Interior
Lamp Relay
15 5A Generic Electronic Module
(GEM), Passive Anti-Theft System
(PATS) Module
Roadside emergencies
131

Fuse/Relay
LocationFuse Amp
RatingDescription
16 20A Instrument Cluster (W/O DRL),
Daytime Running Lamps (DRL)
Module, Hi-Beam Headlamps
(Power supplied through
Multi-Function Switch)
17 10A Heated Backlight Switch, Left
Power/Heated Signal Mirror, Right
Power/Heated Signal Mirror
18 5A Main Light Switch, Generic
Electronic Module (GEM),
Instrument Illumination (Power
supplied through Main Light
Switch)
19 10A Instrument Cluster, Air Bag
Diagnostic Monitor
20 5A 4 Wheel Air Suspension (4WAS),
Generic Electronic Module (GEM)
21 15A Digital Transmission Range (DTR)
Sensor, Junction Box Fuse/Relay
Panel (Fuse 20)
22 10A Air Bag Diagnostic Monitor
23 10A Trailer Tow Battery Charge Relay,
4X4 Center Axle Disconnect
solenoid, 4X2 Center Axle
Disconnect Solenoid, Function
Selector Switch, Rear Integrated
Control Panel, Recirculation
Vacuum Solenoid, Auxiliary A/C
Mode Acturator, Auxiliary A/C
Control Module
24 10A Function Selector Switch
25 5A 4 Wheel Anti-Lock Brake System
(4WABS) Module, 4WABS Relay
Roadside emergencies
132