1998 FORD MUSTANG maintenance

Do not park, idle, or drive your vehicle in
dry grass or other dry ground cover. The
emission system heats up the engine compartment
and exhaust system, which can start a fire.
Illumination of the charging system warning light,
ªService Engine Soonº light or the temperature
warning light, fluid leaks, strange odors, smoke or
loss of oil pressure, could indicate that the emission
control system is not working properly.
Exhaust leaks may result in entry of harmful
and potentially lethal fumes into the
passenger compartment.
Do not make any unauthorized changes to your
vehicle or engine. By law, vehicle owners and anyone
who manufactures, repairs, items, sells, leases,
trades vehicles, or supervises a fleet of vehicles are
not permitted to intentionally remove an emission
control device or prevent it from working.
Information about your vehicle's emission system is
on the Vehicle Emission Control Information Decal
located on or near the engine. This decal identifies
engine displacement and gives some tune up
specifications.
Please consult your ªWarranty Guideº for complete
emission warranty information.
Readiness for inspection/maintenance (I/M)
testing
In some localities, it may be a legal requirement to
pass an I/M test of the on-board diagnostic (OBD-II)
system. If your ªCheck Engine/Service Engine Soonº
light is on, refer to the description in theWarning
Lights and Chimessection of theInstrumentation
chapter. Your vehicle may not pass the I/M test with
the ªCheck Engine/Service Engine Soonº light on.
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164

If the vehicle's powertrain system or its battery has
just been serviced, the OBD-II system is reset to a
ªnot ready for I/M testº condition. To ready the
OBD-II system for I/M testing, a minimum of
30 minutes of city and highway driving is necessary
as described below:
²First, at least 10 minutes of driving on an
expressway or highway.
²Next, at least 20 minutes driving in stop-and-go,
city-type traffic with at least four idle periods.
Allow the vehicle to sit for at least eight hours
without starting the engine. Then, start the engine
and complete the above driving cycle. The engine
must warm up to its normal operating temperature.
Once started, do not turn off the engine until the
above driving cycle is complete.
EXTERIOR BULBS
Replacing exterior bulbs
Check the operation of the following lamps
frequently:
²Headlamps
²Tail lamps
²Brakelamps
²High-mount brakelamp
²Turn signals
²Backup lamps
²License plate lamp
Do not remove lamp bulbs unless they will be
replaced immediately. If a bulb is removed for an
extended period of time, contaminants may enter
the lamp housings and affect performance.
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165

Replacing headlamp bulbs
Handle a halogen headlamp bulb carefully
and keep out of children's reach. Grasp the
bulb only by its plastic base and do not touch the
glass. The oil from your hand could cause the bulb
to break the next time the headlamps are
operated.
To remove the headlamp bulb:
1. Make sure headlamp switch is in OFF position,
then open the hood.
2. At the back of the
headlamp, pull two
retainer pins up to
release the headlamp
assembly.
3. Pull headlamp
assembly forward
disengaging the lamp
from the rear hidden snap retainers to expose the
back of the bulb.
4. Release clip and
disconnect the
electrical connector
from the bulb.
5. Remove the bulb
retaining ring by
rotating it
counterclockwise
(when viewed from the
rear) about
1¤4turn to
free it from the bulb socket, and slide the ring off
the plastic base. Keep the ring to retain the new
bulb.
6. Without turning, remove the old bulb from the
lamp assembly by gently pulling it straight out of the
lamp assembly.
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166

To install the new bulb:
1. With the flat side of
the new bulb's plastic
base facing upward,
insert the glass end of
the bulb into the lamp
assembly. You may
need to turn the bulb left or right to align the
grooves in the plastic base with the tabs in the lamp
assembly. When the grooves are aligned, push the
bulb into the lamp assembly until the plastic base
contacts the rear of the lamp assembly.
2. Install the bulb retaining ring over the plastic base
until it contacts the rear of the socket by rotating
clockwise until you feel a ªstop.º
3. Connect the electrical connector into the plastic
base until it snaps, locking it into position.
4. Install the headlamp on vehicle by aligning the
lamp with the rear snap retainer, push to seat and
secure with two retainer pins.
5. Turn the headlamps on and make sure they work
properly. If the headlamp was correctly aligned
before you changed the bulb, you should not need to
align it again.
Replacing front parking lamp/turn signal bulbs
1. Make sure the headlamp control is in the OFF
position.
2. Open the hood.
3. At the back of the
headlamp, pull two
retainer pins up to
release the headlamp
assembly.
4. Pull headlamp
assembly forward
disengaging the lamp
from the rear snap retainer to expose the back of
the bulb.
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167

5.Rotate the bulb
socket counterclockwise
about
1¤4turn and
remove from lamp
assembly.
6. Carefully pull the
bulb straight out from
the socket and push in
the new bulb.
7. To complete installation, follow the removal
procedure in reverse order.
High-mount brakelamp bulbs
1. Open trunk.
2. Inside trunk, locate
access hole under the
luggage compartment
door.
3. Remove the bulb
socket by rotating it
45 degrees and pulling
it out of the lamp
assembly.
4. Carefully pull bulb straight out of socket and push
in new bulb.
5. To complete installation, follow the removal
procedure in reverse order.
Replacing foglamp bulbs
The halogen bulb contains gas under pressure.
The bulb may shatter if the glass envelope is
scratched or if the bulb is dropped. Handle the
bulb carefully. Grasp the bulb only by its base.
Avoid touching the glass envelope.
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168

1. Rotate the foglamp
bulb counterclockwise
and remove from
foglamp (the rear side
of the foglamp is
shown).
2. Disconnect the
electrical connector
from the foglamp bulb.
3. Connect the electrical connector to the new
foglamp bulb.
4. Install the foglamp bulb in foglamp by rotating
clockwise.
Replacing license plate lamp bulbs
To change the license plate bulbs:
1. Open trunk and
remove bulb socket
from the trunk lid by
turning
counterclockwise.
2. Pull the bulb straight
out of the socket and
push in the new bulb.
3. Install the bulb socket in trunk lid by turning
clockwise.
Replacing tail lamp/backup bulbs
For bulb replacement, see a dealer or qualified
technician.
Interior bulbs
Check the operation of the following interior bulbs
frequently:
²interior overhead lamp
²map lamp
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169

Map lamps
For bulb replacement, see a qualified service
technician or your dealer.
Using the right bulbs
Function Trade Number
Tail lamp, brakelamp, turn lamp 3157K
Park lamp, turn lamp, side
marker (front)3157NAK
Backup lamp 3156K
License plate lamp 168
High-mount brakelamp 906
Headlamps 9007
Luggage compartment lamp 906
Dome lamp 575
Map lamp 575
Visor vanity lamp 74
Glove compartment 194
Rearview mirror map lamps 192
Fog lamp 899
To replace all instrument panel lights - see your
dealer.
AIMING THE HEADLAMPS
The alignment of your headlamps should be checked
if:
²Oncoming motorists frequently signal you to
deactivate your high beams, and your high beams
are not activated.
²The headlamps do not seem to provide enough
light for clear night vision.
²The headlamp beams are pointed substantially
away from a slightly down and to the right
position.
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170

Vertical aim adjustment
1. Park the vehicle on
a level surface
approximately
7.6 meters (25 feet)
from a vertical wall or
screen directly in front
of it.
2. Measure the height
from the center of your
headlamp to the
ground and mark an
2.4 meters (8 foot)
horizontal reference line on the vertical wall or
screen at this height (a piece of masking tape works
well). The center of the lamp is marked by a 3.0 mm
circle on the headlamp lens.
3. Turn on the low beam headlamps to illuminate the
wall or screen and open the hood.
4. On the wall or screen you will observe a distinct
line of high intensity light. If this is not centered on
the horizontal reference line, the beam will need to
be adjusted.
5. Locate the vertical adjuster on each headlamp,
then usea6mmwrench or screwdriver to turn the
adjuster either counterclockwise (to adjust up) or
clockwise (to adjust down) centering the light on
the horizontal reference line.
6. HORIZONTAL AIM IS NOT REQUIRED FOR THIS
VEHICLE AND IS NON-ADJUSTABLE.
7. Close the hood and turn off the lamps.
CLEANING AND CARING FOR YOUR VEHICLE
Refer to the ªCustomer Assistance Guideº for a list
of Ford-approved cleaners, polishes and waxes.
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171