lock FORD BRONCO 1988 Workshop Manual

195
However, the front driveline will remain
engaged to the front wheels until the manual
locking hubs are disengaged. To disengage the
manual locking hubs, stop the vehicle and rotate
both hub lock selector knobs counter-clockwise
to the FREE position.
*
[DR17270(B F )06/94]
Operating in 2H with the hubs in the LOCK
position increases fuel consumption, noise,
vibration, and wear. For prolonged 2H operation
on dry pavement, set the manual locking hubs
to the FREE position.
*
[DR17301(B F )06/94]
To shift between 4H and 4L:
*
[DR17330(B F )05/91]
Stop the vehicle and place the automatic
transmission into NEUTRAL or depress the
clutch on manual transmission vehicles. Push the
transfer case shift knob down (toward the
ground) and at the same time pull or push the
lever straight forward or rearward (depending
on the desired position 4H or 4L) in order to
shift the transfer case. This shift should be with
one continuous motion without pausing in the N
(neutral) position. Pausing in the neutral position
can result in gear clash and difficult shifting. If,
while shifting between 4H and 4L, the transfer
case gets stuck in the N (neutral) position or is
difficult to shift into either 4H or 4L, it may be
necessary to let the vehicle roll slightly and/or
turn off the engine (particularly on vehicles
equipped with automatic transmission).
*
[DR17390(B F )06/94]
To shift to N (neutral) from either 4H or 4L
[DR17480(B )05/91]
To shift into N (neutral), stop the vehicle and
engage the parking brake. Place the automatic
transmission into NEUTRAL or depress the
clutch on manual transmission vehicles. From
either the 4H or 4L position, push the transfer
case shift knob down (toward the ground) and
at the same time move the transfer case shift
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197
*
[DR17660(B F )06/94]
Touch Drive system indicator lights
*
[DR17690(B F )03/91]
A 4x4 indicator light and a LOW RANGE
indicator light are located at the lower right of
the instrument cluster. In addition, two small
amber lights are located near the Touch Drive
system buttons. The amber light to the left of the
4x4 button will light up at the same time as the
4x4 instrument panel light. The amber light to
the left of the LOW RANGE light will light up
at the same time as the instrument panel LOW
RANGE light.
*
[DR17750(B F )06/94]
q
Two Wheel Drive mode Ð Neither the 4x4
nor the LOW RANGE lights are lit.
*
[DR17780(B F )06/94]
q
4x4 mode Ð Only the 4x4 light is lit.
*
[DR17810(B F )06/94]
q
4x4 LOW RANGE mode Ð Both the 4x4 and
LOW RANGE lights are lit.
*
[DR17840(B F )06/94]
To shift from Two-Wheel Drive to 4x4:
*
[DR17871(B F )06/94]
To shift into 4x4, push the 4x4 button located on
the instrument panel. This shift can be done at a
stop or at speeds up to 55 miles per hour
(88 km/h). When the vehicle is driven, the
automatic locking hubs will engage. If the
vehicle is stopped while in 4x4 and the vehicle
direction is reversed from the previous direction,
the automatic locking hubs will momentarily
disengage and reengage. The automatic locking
hubs may click as they automatically engage in
the new direction.
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198
*
[DR17900(B F )05/91]
one third page art:0020634-B
Touch drive electric shift switch
*
[DR17945(B F )06/92]
Ð At extremely low temperatures, it may be
necessary to slow down or even stop to shift
from two wheel drive to 4x4.
*
[DR17960(B F )06/94]
Ð The initial shift from two-wheel drive to 4x4
while the vehicle is moving can cause some
momentary clunk and ratcheting sounds. This is
the front drivetrain coming up to speed and the
automatic locking hubs engaging and is not a
cause for concern.
*
[DR17990(B F )12/91]
Ð Because of possible damage to powertrain
components, never shift from Two-Wheel Drive
to 4x4 with the rear wheels slipping.
*
[DR18020(B F )06/94]
To shift from 4x4 to Two-Wheel Drive:
*
[DR18050(B F )06/94]
Push the 4x4 button; the 4x4 lamp on the
instrument cluster will go out indicating the
vehicle is in Two-Wheel Drive. This can be done
at any speed. To disengage the automatic
locking hubs, operate the vehicle in Two-Wheel
Drive in the opposite direction for approximately
10 feet (3 meters) in a straight line.
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199
*
[DR18080(B F )06/94]
For example:
*
[DR18110(B F )06/94]
If you were driving the vehicle forward in
4x4, the automatic locking hubs will
disengage the next time the vehicle is driven
in reverse in Two-Wheel Drive for
approximately 10 feet (3 meters) in a straight
line.
*
[DR18140(B F )06/94]
If you were driving the vehicle in reverse in
4x4, the automatic locking hubs will
disengage the next time the vehicle is driven
forward in Two-Wheel Drive for
approximately 10 feet (3 meters) in a straight
line.
*
[DR18170(B F )01/95]
Operating in two-wheel drive mode with the
hubs locked increases fuel consumption, noise,
vibration, and wear. For prolonged two-wheel
drive operation on dry pavement, disengagement
of the automatic locking hubs, which is not
required for two-wheel drive operation, stops all
movement of front-wheel drive components
while operating in two-wheel drive.
*
[DR18230(B F )03/91]
To shift from 4x4 to 4x4 LOW RANGE:
*
[DR18290(B F )06/92]
Stop the vehicle and place the automatic
transmission in NEUTRAL or depress the clutch
on vehicles with a manual transmission. Push
the LOW RANGE button on the instrument
panel to shift the transfer case from 4x4 to 4x4
LOW RANGE. Both the 4x4 and LOW RANGE
lights are now lit.
*
[DR18300(B F )08/94]
NOTE: The vehicle must already be in 4x4
before pushing the Low Range Button.
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200
*
[DR18320(B F )03/91]
To shift from 4x4 LOW RANGE to 4x4:
*
[DR18380(B F )06/94]
Stop the vehicle and place the automatic
transmission into NEUTRAL or depress the
clutch on vehicles with a manual transmission.
Push the LOW RANGE button on the instrument
panel to shift the transfer case from 4x4 LOW
RANGE to 4x4.
*
[DR19200(B F )01/89]
Driving Off Road with 4-Wheel
Drive
*
[DR19300(B F )11/89]
Most vehicles with four-wheel drive are
especially equipped for driving on sand, snow,
mud, or rough terrain and have operating
characteristics that are somewhat different from
conventional vehicles, both off and on the road.
The driving tips below will help you learn to
use four-wheel drive.
*
[DR19400(B F )10/94]
q
Do not use 4WD LOW on dry, hard-surfaced
roads.
*
[DR19600(B F )11/89]
q
Special maintenance procedures are necessary
after operating with drive components in
water.
*
[DR19700(B F )08/94]
q
Manual locking hubs must be in LOCK
position before shifting into four-wheel drive.
*
[DR19800(B F )11/89]
When using four-wheel drive, maintain steering
wheel control at all times, especially in rough
terrain. Since sudden changes in terrain can
result in abrupt steering wheel motion, make
sure you grip the steering wheel rim from the
outside. Do not grip the spokes.
*
[DR19900(B F )05/90]
Drive cautiously to avoid vehicle damage from
concealed objects such as rocks and stumps.
Know the terrain or examine maps of the area in
question before driving. Map out your route
beforehand. To maintain steering and braking
control of your vehicle, you must have all four
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204
*
[DR22400( ALL)05/95]
RWARNING
An increase in pedal travel will result in
reduced braking capability. The brake
system should be checked immediately.
[DR22905(B )08/94]
Anti-lock Brake System
*
[DR22910(B )08/94]
Your vehicle is equipped with a Four Wheel
Anti-lock Braking System (4WABS). The 4WABS
helps the driver to maintain vehicle control by
preventing wheel lockup during hard braking.
*
[DR22915(BE )03/94]
The 4WABS operates with a computer that is
able to optimize vehicle control during braking
on varying tire and road conditions by
modulating the brake pressure at each of the
front wheels and the rear axle. This ªpumping
actionº is similar to the driver ªpumpingº the
brakes but happens at a much faster rate.
*
[DR22920(BE )05/95]
RWARNING
The Anti-lock system does NOT assist the
vehicle in stopping quickly on wet or icy
surfaces. Heavy braking combined with
poor road conditions could cause you to
lose steering control of your vehicle.
*
[DR22925(BE )10/94]
Using anti-lock brakes
*
[DR22930(BE )05/94]
The operation of a vehicle with 4WABS is not
similar to the operation of normal brakes. Some
differences exist and are listed below:
*
[DR22935(BE )10/94]
q
Apply the brake steadily. In the event of a
panic stop, do NOT ªpumpº the brakes.
ªPumpingº the brakes during an Anti-lock
stop will diminish braking effectiveness.
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205
*
[DR22940(BE )10/94]
q
During an Anti-lock stop, the driver will
notice a brake pedal pulsation and hear some
noise from the engine compartment. This is
an indication that the 4WABS system is
working correctly and is normal.
*
[DR22945(BE )05/95]
RWARNING
The Anti-lock system does NOT decrease
the time necessary to apply the brakes.
Always leave enough room between the
vehicle in front of you and your vehicle.
*
[DR22950(BE )05/95]
4WABS driver warning light
[DR22955(BE )08/94]
The 4WABS computer continuously monitors the
system while driving for any electrical faults or
system malfunctions. In addition, the 4WABS
computer performs an initial system check called
bulb proveout when the vehicle ignition is
switched on. During bulb proveout, the amber
ªABSº light on the instrument cluster will
momentarily illuminate and then go out.
*
[DR22960(BE )03/93]
NOTE: After starting the vehicle and upon
initial drive-off, the driver may notice
a single pulse of the brake pedal and a
noise from the engine compartment.
This is part of the initial system check
and is normal.
[DR22965(BE )08/94]
Should a malfunction in the 4WABS system
occur, the amber ªABSº light on the instrument
cluster will come on and stay on indicating that
the antilock system has been shut down and the
vehicle needs to be serviced. Normal braking is
not affected unless the red brake warning light
is also illuminated.
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206
*
[DR22970(BE )10/94]
NOTE: It is important to note that when the
ABS Warning Light is illuminated the
ABS system is disabled. The vehicle
must be serviced immediately to
restore the benefits of the Anti-lock
system.
*
[DR22975(BE )10/94]
NOTE: Mobile phones or radio transmitters
not installed by Ford Motor Company
may interfere with the Anti-lock
System. Should the Anti-lock system
activate unexpectedly or the Anti-lock
Warning Light illuminate after
installation of such a unit, have the
installation of the unit checked.
*
[DR23000(BE M)12/89]
If Brakes Do Not Grip Well or Pedal is
ªLowº
*
[DR23200(BEF )11/89]
If brakes do not grip well, it may indicate the
rear drum brakes need adjustment. To do this,
drive the vehicle in reverse at 5 mph (8 km/h)
on level, dry pavement. Stop the vehicle by
firmly applying the brakes. Repeat this
procedure four or five times.
*
[DR23250( ALL)11/89]
If during normal operation the brake pedal
seems ªlowº, it may indicate the need for a
brake system inspection and/or service. You
should have your brakes checked as soon as
possible.
*
[DR23300( ALL)02/95]
Occasional brake squeal during light to moderate
stops does not affect the function of the brake
system and is normal. However, if the squeal
becomes annoyingly loud or increases
significantly in frequency of occurrence, return
the vehicle to your dealer for inspection.
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209
*
[DR24950(B F )03/95]
RWARNING
When parking, do not use the gearshift in
place of the parking brake. Turn the key
to LOCK whenever you leave your
vehicle. Always set the parking brake
fully and make sure that the gearshift is
securely latched in P (Park) (automatic
transmission) or in 1 (First) (manual
transmission). Never leave your vehicle
unattended while it is running. If you do
not take these precautions, your vehicle
may move unexpectedly and injure
someone.
[DR24970(B F )05/95]
When the transfer case is in the N (Neutral)
position, the engine and transmission are
disconnected from the rest of the driveline.
Therefore, the vehicle is free to roll even if the
automatic transmission is in P (Park) or the
manual transmission is in gear.
*
[DR24975(B F )05/95]
RWARNING
Do not leave the vehicle unattended with
the transfer case in the N (Neutral)
position. Always set the parking brake
fully and turn off the ignition when
leaving the vehicle.
*
[DR25000(B FM)03/93]
To release the parking brake, press the service
brake pedal with your right foot and pull the
parking brake release lever.
*
[DR25050( ALL)01/93]
RWARNING
If the parking brake is fully released, but
the Brake System light remains on, have
the brakes checked immediately. They
may not be working properly.
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212
*
[DR27150(B F )05/95]
RWARNING
To avoid losing control on slippery roads,
do not downshift into Low with the
automatic transmission when moving
faster than 20 mph (32 km/h). Do not
downshift into First with the manual
transmission when moving faster than
5 mph (8 km/h).
*
[DR27350(B F )06/94]
RWARNING
The rear antilock brake system may not
prevent brake lock-up on extremely
slippery surfaces. Rear brake lock-up may
also occur while driving in four-wheel
drive because the transfer case couples the
front and rear axles together.
*
[DR27450(BEF )03/95]
Traction-Lok Rear Axle (If equipped)
*
[DR27501(BEF )03/95]
This axle provides added drive away traction on
slippery surfaces, particularly when one or more
wheels are on a surface with poor traction.
*
[DR27550(BEF )03/93]
Extended use of other than matching 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.
*
[DR27601(BEF )05/95]
RWARNING
To avoid injury, never run the engine
with one wheel off the ground, such as
when changing a tire.
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