vin FORD BRONCO 1988 Workshop Manual

191
*
[DR16370(B F )06/94]
4x4 system indicator lights
*
[DR16401(B F )06/94]
A 4x4 light and a LOW RANGE light are
located at the lower right of the instrument
cluster.
*
[DR16430(B F )06/94]
q
2H position Ð Neither the 4X4 or the LOW
RANGE lights are lit.
*
[DR16460(B F )06/94]
q
4H position Ð Only the 4x4 light is lit.
*
[DR16490(B F )06/94]
q
N position Ð Neither the 4x4 or LOW
RANGE lights are lit.
*
[DR16520(B F )06/94]
q
4L position Ð Both the 4x4 and the LOW
RANGE lights are lit.
*
[DR16550(B F )03/91]
Lever Operated System With Automatic
Locking Hubs
*
[DR16580(B F )06/94]
To shift from 2H to 4H:
*
[DR16610(B F )02/92]
Stop the vehicle and move the transfer case shift
lever straight back to the 4H position, the
automatic locking hubs will engage when the
vehicle is driven. When the automatic locking
hubs are engaged, shifts between 2H and 4H
may take place at any speed.
*
[DR16620(B F )02/92]
q
The automatic locking hubs may disengage in
2H if the vehicle's direction is momentarily
reversed, or the vehicle is allowed to roll
slightly in the opposite direction. If a
grinding noise occurs when shifting from 2H
to 4H while the vehicle is moving, one or
both of the automatic locking hubs have been
disengaged and the transfer case shift lever
should be switched back to the 2H position.
To shift back into 4H, stop the vehicle and
move the transfer case shift lever straight
back to the 4H position.
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192
*
[DR16630(B F )05/91]
q
When the vehicle is stopped while in 4H and
the vehicle's direction is reversed from the
previous direction, the automatic locking hubs
momentarily disengage and then re-engage.
The automatic locking hubs may click as they
automatically engage in the new direction.
*
[DR16640(B F )06/94]
To shift from 4H to 2H:
*
[DR16670(B F )03/93]
Move the transfer case shift lever straight
forward to the 2H position. This can be done at
any speed. To disengage the automatic locking
hubs, operate the vehicle in 2H in the opposite
direction for approximately 10 feet (3 meters).
*
[DR16701(B F )06/94]
For example:
*
[DR16730(B F )03/93]
If you were driving the vehicle forward in
4H, the automatic locking hubs will
disengage the next time the vehicle is driven
in reverse in 2H for approximately 10 feet (3
meters).
*
[DR16760(B F )03/93]
If you were driving the vehicle in reverse in
4H, the automatic locking hubs will
disengage the next time the vehicle is driven
forward in 2H for approximately 10 feet (3
meters).
*
[DR16790(B F )03/91]
Ð Operating in 2H with the hubs locked
increases fuel consumption, noise, vibration, and
wear. For prolonged 2H operation on dry
pavement, disengage the automatic locking hubs.
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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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201
tires on the ground, and they must be rolling,
not sliding or spinning.
*
[DR19925(B F )11/89]
Transmission upshift in 4x4 with transfer case in
4L may be quite firm due to large total gear
reduction. This condition is normal.
*
[DR20000(B F )11/89]
Sand
*
[DR20100(B F )11/89]
When driving over sand, try to keep all four
wheels of the vehicle on the most solid area of
the trail. Do not reduce the tire pressures but
shift to a lower gear and drive steadily through
the terrain. Apply accelerator slowly and avoid
spinning the wheels.
*
[DR20200(B F )11/89]
Mud and Water
*
[DR20300(B F )12/89]
When driving through water, determine the
depth; avoid water higher than the bottom of
the hubs (if possible) and proceed slowly. If the
ignition system gets wet, the vehicle may stall.
*
[DR20400(B F )11/89]
Once through water, always try the brakes. Wet
brakes do not stop the vehicle as effectively as
dry brakes. Drying can be improved by moving
your vehicle slowly, while applying light
pressure on the brake pedal.
*
[DR20500(B F )11/89]
After driving through mud, clean off residue
stuck to rotating driveshafts and tires. Excess
mud stuck on tires and rotating driveshafts
causes an imbalance which could damage drive
components.
*
[DR20525(B F )07/94]
NOTE: If the transmission and transfer case is
submerged in water, their fluids should
be checked and changed, if necessary.
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202
*
[DR20650(B )11/89]
Additional Special Driving
Instructions for Utility Vehicles
*
[DR20701(B F )11/89]
Driving on Hill or Slope Terrain
*
[DR20800(B F )08/94]
When driving on a hill, it may be necessary to
travel diagonally up or down. Avoid driving
crosswise or turning on steep slopes, you could
lose traction and slip sideways. Drive straight
up, straight down or avoid the hill completely.
Know the conditions on the other side of a hill
before driving over the crest.
*
[DR20900(B F )11/89]
When climbing a steep hill, start in a lower gear,
rather than finding it necessary to downshift
from a higher gear after the ascent has started.
This reduces strain on the engine and the
possibility of stalling.
*
[DR21000(B F )11/89]
When descending a steep hill avoid sudden
braking. Rapid pumping of the brake pedal will
help slow the vehicle and still maintain steering
control.
*
[DR21101(B F )11/89]
Driving on Snow or Ice
*
[DR21200(B F )10/90]
A four-wheel drive vehicle has advantages over
two-wheel drive vehicles in snow and ice but
can skid like any other vehicle. If so equipped,
keep the vehicle in four-wheel drive if icy or
slippery conditions exist.
*
[DR21300(B F )11/89]
Avoid sudden applications of power and quick
changes of direction on snow or ice. Apply the
accelerator slowly and steadily when starting
from a full stop.
[DR21312(B F )05/95]
All utility-type and Four-Wheel Drive vehicles
have special design and equipment features to
make them capable of performing in a wide
variety of off-road applications. Specific design
characteristics give them higher centers of
gravity than ordinary passenger cars.
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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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207
*
[DR23400(BEF )11/89]
RWARNING
Modifications to the suspension spring
rates and/or vehicle ride height may
adversely affect vehicle stopping ability.
*
[DR23500(BEF )07/92]
If Brakes Pull
*
[DR23600(BEF )07/92]
q
Check tire pressure
*
[DR23700(BEF )07/92]
q
Perform the self-adjustment procedure
described underIf Brakes Do Not Grip Well or
Pedal is ªLow.º
*
[DR23800(BEF )05/95]
If pull occurs during the first 500 miles
(800 km), make 10 moderately fast stops from
40 mph (65 km/h) and then perform the
self-adjustment procedure above. It may be
necessary to repeat this operation to properly
seat new brake linings and pads.
*
[DR24000( ALL)01/93]
Stopping Distances
*
[DR24100( ALL)11/89]
Stopping distances vary with different loads and
driving conditions. Use caution when
encountering new conditions and acquaint
yourself with vehicle performance. Take full
advantage of engine braking power when
slowing down.
%*
[DR24200( ALL)01/95]
Applying the Brakes
*
[DR24300( ALL)05/95]
Apply the brake pedal gradually. Use the
ªsqueezeº technique Ð push on the brake pedal
with a steadily increasing force. This allows the
wheels to continue to roll while you are slowing
down, which lets you steer properly.
*
[DR24400( ALL)05/95]
RWARNING
Do not drive with your foot resting on the
brake pedal. This will increase your
vehicle's stopping distance and may also
cause brake damage.
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208
*
[DR24500( ALL)05/95]
RWARNING
If you are driving down a long or steep
hill, shift to a lower gear. Do not apply
your brakes continuously, as they may
overheat and become less effective.
*
[DR24600( ALL)03/95]
Using the Parking Brake
*
[DR24650(BEF )01/95]
The parking brake should be used whenever you
park your vehicle.
*
[DR24800(B F )12/91]
The parking brake pedal is suspended just below
the bottom of the instrument panel to the left of
service brake and/or clutch pedals. To set the
parking brake while parking your vehicle, press
the brake pedal with your right foot and hold it
while you push the parking brake pedal down
firmly and fully with your left foot.
*
[DR24920(B FM)07/91]
one third page art:0020893-A
Parking Brake
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