1988 JEEP CHEROKEE warning light

SER VIC E IN DIC ATO R & W AR NIN G L IG HTS

1988 J e ep C hero ke e
1984-92 MAINTENANCE
AMC/Jeep/Eagle Service Indicator & Warning Lights
Jeep; Cherokee, Wagoneer
SERVICE INDICATOR & WARNING LIGHTS
BRAKE WARNING LIGHT
If the light stays on when the parking brake is off, it
indicates a possible brake system fluid leak or low pressure level.
LOCK INDICATOR LIGHT (1984-87)
Indicates that Selec-Trac transfer case is in part time 4WD
(high or low range).
FULL TIME 4WD INDICATOR LIGHT
Indicates that Selec-Trac transfer case is in full-time 4WD
(4x4 FULL TIME).
PART TIME 4WD INDICATOR LIGHT
Indicates that Selec-Trac transfer case is in part time 4WD
(4x4 PART TIME or 4 LO) or that Command-Trac transfer case is in 4WD
(4H or 4L).
WATER IN FUEL LIGHT (TURBO DIESEL)
Indicates water has collected in the fuel filter and should
be drained immediately.
DIESEL WAIT LIGHT (TURBO DIESEL)
Illuminates during glow plugs warm-up cycle.
LOW FUEL WARNING LIGHT
Glows when approximately 2 gals. (7.6L) remain in fuel tank.
EMISSION MAINTENANCE INDICATOR LIGHT
Illuminates at approximately 82,500 miles to indicate
scheduled maintenance (or recommended maintenance on California
vehicles). Light will remain on until system is serviced and light is
reset.
CHECK ENGINE LIGHT
If this light illuminates and remains on while driving, it
indicates a potential engine control problem that needs service.
CHECK ANTI-LOCK LIGHT
Illuminates to indicate a self-check is in process at vehicle
start up. If light remains on after start-up or comes on and stays on

at road speeds, it may indicate that the ABS system has detected a
malfunction or has become inoperative. The system reverts to standard
non-anit-lock brakes. If both Red BRAKE light and Amber CHECK ANTI-
LOCK light are on, have vehicle serviced immediately.
Fig. 1: Instrument Panel Interior Controls
Courtesy of Chrysler Motors.
Fig. 2: Dash Gauges & Warning Lights (Gasoline Engines)
Courtesy of Chrysler Motors.

Fig. 3: Dash Gauges & Warning Lights (Turbo-Diesel Engines)
Courtesy of Chrysler Motors.

STE ER IN G C O LU M N S W IT C HES

1988 J e ep C hero ke e
1988 STEERING
Jeep Steering Column Switches
All Models
REMOVAL & INSTALLATION
TURN SIGNAL & HAZARD FLASHER SWITCHES
Removal & Installation
1) Place front wheels in straight-ahead position. Disconnect
battery negative cable. Remove the steering wheel. Refer to the
STEERING WHEEL & HORN REMOVAL article.
2) On models with A/T, place selector lever in "PARK"
position. Remove selector lever retaining pin and lever. Using 2
screwdrivers, remove lock plate cover. On models with tilt column,
remove tilt lever.
3) Using Plate Compressor (J-23653-A), compress lock plate.
If shaft has metric threads, use Metric Forcing Screw (J-23653-4)
prior to installing compressor on shaft. Remove and discard lock plate
snap ring. Remove plate compressor
NOTE: The lock plate is under strong spring tension. DO NOT
attempt to remove snap ring without using lock plate
compressor.
4) Remove lock plate, canceling cam, upper bearing preload
spring, spring seat and bearing race (thrust washer on some models).
Depress hazard warning switch while unscrewing from column.
5) On vehicles with A/T, use a paper clip to compress lock
tab retaining shift quadrant light wire in connector block. Disconnect
wire. On all models, remove turn signal lever attaching screw and
lever.
6) On vehicles with cruise control, disconnect 2 of 4 wires
at switch connector. Fold wires back along harness. Tape wires to
harness. Tape a string to harness to aid in removal.
7) Disconnect turn signal switch wire harness at bottom of
steering column. Tape around turn signal switch harness connector to
aid in removal. Remove turn signal switch attaching screws. Remove
switch. To install, reverse removal procedure.
LOCK CYLINDER
Removal
1) Remove horn button and steering wheel. Refer to the
STEERING WHEEL & HORN REMOVAL article. Remove turn signal switch.
Remove key warning buzzer switch and contacts as an assembly, using
needle-nose pliers.
2) On models with standard column, turn ignition lock
cylinder (clockwise) 2 detent positions beyond the "OFF/LOCK"
position. On models with tilt column, turn lock cylinder to "LOCK"
position. On all models, compress lock cylinder retaining tab and
remove lock cylinder from housing. See Fig. 1.

* The lock inhibitor assembly consists of a lever that engages
lock levers (preventing locking of steering shaft), a button
to operate lever and a return spring. Assembly is attached to
lock housing in same location as shift gate is on column
shift. Lower steering shaft bearing is mounted in an aluminum
support.
* A spring is attached between shift housing and column jacket.
This spring keeps housing rotated counterclockwise against
rubber bumper.
OVERHAUL
STANDARD COLUMN
NOTE: All columns are similar except for appearance of covers.
Some models use ignition key light, while others do not.
Disassembly and reassembly procedures cover all models. Some
procedures may not apply to every steering column.
Disassembly
1) Pry out wiring trough retainers. Lift off trough. New
retainers may be required for reassembly. Use masking tape to protect
paint and a deep socket to back-up housing. Drive retaining roll pin
out with a punch to remove shift lever.
2) Remove breakaway capsules. Secure column in vise by
clamping at column bracket. DO NOT distort column. Remove turn signal
lever cover-to-lock housing attaching screws. Remove cover. Remove
wiper/washer switch assembly. Pull switch cover up wiper/washer lever.
Remove lever sleeve-to-switch attaching screws.
3) Rotate wiper/washer shaft to full clockwise position.
Remove shaft from switch. Remove turn signal switch and upper bearing
retaining screws. Remove retainer. Lift switch upward out of way.
Unclip horn ground wire. Remove ignition key light retaining screw.
Lift ignition key light out of way.
4) Remove bearing housing-to-lock attaching screws. Remove
snap ring from upper end of steering shaft. Remove bearing housing
from shaft. Remove lock plate spring and lock plate from shaft. Remove
shaft through lower end of column.
5) Remove ignition key. Remove warning switch retaining
screw. Lift out key warning switch. Remove 2 ignition switch-to-column
jacket retaining screws. See Fig. 2. Remove ignition switch by
rotating switch 90 degrees on actuator rod. Remove 2 dimmer switch
retaining screws. Disengage dimmer switch from rod.

1) Remove lower bracket assembly-to-lower bearing support
bolts. On column shift models, remove shift housing cover. On floor
shift models, unsnap and remove shroud extensions. Remove wiring
protector from column jacket.
2) Mount column in vise at capsule bracket. Mount Holding
Fixture (C-4132) onto column. Mount holding fixture and column in
vise.
3) Remove tilt lever. To remove hazard warning knob, push in
knob while unscrewing. Remove ignition key light assembly. Pull knob
off wiper/washer switch assembly. Pull hider up switch lever. Remove 2
sleeve-to-wiper/washer switch retaining screws. Remove sleeve.
4) Rotate shaft in wiper switch fully clockwise. Remove shaft
by pulling straight out of wiper/washer switch. Carefully remove
plastic cover from lock plate. Using Lock Plate Depressor (J-23653-A
for Jeep), depress lock plate. Pry retaining ring from groove.
5) Remove lock plate, canceling cam and upper bearing plate.
Remove switch actuator screw and arm. Remove 3 turn signal switch
attaching screws. Place shift bowl in "LOW" position. Wrap a piece of
tape around wires to prevent snagging when removing switch. Remove
switch and wiring.
6) Remove key light. Place lock cylinder in "LOCK" position.
Insert a small screwdriver into slot next to switch mounting screw
boss. Depress spring latch at bottom of slot. Remove lock.
7) Using a paper clip, remove key warning switch. Bend one
end of clip into a hook. Insert hook into exposed loop of wedge
spring. Pull clip. Remove spring and switch. DO NOT allow spring to
fall into steering column.
8) Remove 3 housing cover screws. Remove housing cover.
Remove wiper/washer switch. Using a punch, press out wiper switch
pivot pin (if necessary). Tilt lever opening shield and dimmer switch
actuator rod may be removed from cap (if necessary).
9) Place column in fully upright position. Using a large
Phillips screwdriver, remove tilt spring retainer. Insert screwdriver
in opening. Push in approximately 3/16". Turn approximately 1/8 turn
clockwise until ears align with grooves in housing. Remove spring and
guide.
10) Remove dimmer switch mounting screws. Remove dimmer
switch. Separate dimmer switch from rod by pulling on rod. Push upper
steering shaft in far enough to remove steering shaft inner race seat
and inner race. With ignition switch in "ACC" position, remove
ignition switch mounting screws and switch. Place Pivot Pin Remover
(J-21854-01 for Jeep) over pivot pin. Thread small portion of screw
firmly into pin.
11) Hold screw from turning with one wrench while turning nut
clockwise with a second wrench to withdraw pivot pin from support.
Remove opposite pivot pin in same manner. Use tilt release lever to
disengage lock shoes. Remove bearing housing assembly by pulling
upward to extend rack fully.
12) Move housing assembly left to disengage rack from
actuator. Rotate housing clockwise to free dimmer switch actuator rod.
Remove activator assembly. Remove coupling from lower end of steering
shaft. Double coupling is retained to shaft with a roll pin. Remove
shaft assembly from upper end.
CAUTION: DO NOT drop or bump steering shaft as plastic pins may shear.
13) Disassemble steering shaft assembly by removing center
spheres and anti-lash springs. See Fig. 9. Remove 4 bolts securing
support to lock plate. Remove support from end of column jacket.
Remove 2 attaching screws and shift gate from support (if necessary).
Dimmer switch is removed with support.

jacket mounting plate. Tighten screws to 60 INCH lbs. (7 N.m). Install\
lower bearing on lower end of jacket (if removed).
8) Install centering spheres and anti-lash spring in upper
steering shaft. Install lower steering shaft from same side of spheres
that spring ends protrude. Perform a trial fit of assembly to ensure
that master serration of upper shaft is on same side as master
serration of lower shaft assembly.
9) Position shift bowl fully counterclockwise. Install
ignition switch actuator rod between bowl and jacket from bottom.
Guide back of coupling into support slot. Assemble bearing housing
over steering shaft. Engage rack over end of ignition switch actuator
rod.
10) Position access hole of bearing housing over end of
dimmer switch actuator rod. Rotate housing counterclockwise to
assemble. Holding lock shoes in disengaged position, assemble bearing
housing over steering shaft until pivot holes line up with holes in
support.
11) Install pivot pins. Assemble as far as possible, using
palm pressure of hand to prevent enlarging support pivot hole. Using a
small hammer and punch, tap pins into place. Replace wiper/washer
pivot assembly. Press pivot pin in cover (if removed). Check pivot
assembly for ease of movement.
12) If movement is restricted, tap other end of pin for
clearance. Install wiper/washer switch. Replace tilt lever opening
shield in cover (if removed). Position cap over dimmer switch actuator\
rod. Guide end of actuator rod into pivot slot during cover assembly.
Hold cap so that cover will slide over it.
13) Place housing in full upward position. Ensure there is
grease between guide and peg on support, tilt spring and tilt spring
retainer. Install guide. Using a screwdriver in retaining slot, turn
retainer clockwise to engage. Install bearing inner race and seat.
14) Install lock housing cover. Tighten 3 screws to 100 INCH
lbs. (11 N.m). Assemble key warning switch to spring clip with formed
end of clip under end of switch and with spring bowed away from switch
on side opposite contact. Push switch and spring into hole in lock
housing cover with contacts facing lock cylinder bore.
15) Install key light (if equipped). Install turn signal
switch wires and connector through cover, bearing housing and shift
bowl. Push in hazard plunger. Install turn signal switch. Tighten
screws to 25 INCH lbs. (3 N.m). Install hazard warning knob and screw.\
Pull knob out.
16) Install canceling cam spring, canceling cam (carrier
assembly) and lock plate. Using Lock Plate Depressor (J-23653-A for
Jeep), depress lock plate. See Fig. 12. Install a new retaining ring.
Install tilt release lever (if removed). Install turn signal switch
lever.
Fig. 12: Installing Lock Plate Retaining Ring

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AIR RIDE SUSPENSION - WARNING LAMPS
AIR RIDE SUSPENSION - WARNING LAMP INSPECTION








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Condition Code Procedure
Bulb burned out ......... A ............ Require replacement.
Warning light does
not come on during
bulb check ............. .. . Further inspection required to
determine cause.
Warning light flashes ... .. . Further inspection required to
determine cause.
Warning light is
intermittent ........... .. . Further inspection required to
determine cause.
Warning light stays
on after initial
bulb check ............. .. . Further inspection required to
determine cause.









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AIR RIDE SUSPENSION - WIRING HARNESSES
AIR RIDE SUSPENSION - WIRING HARNESS INSPECTION








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Condition Code Procedure
Connector bent .......... A .. Require repair or replacement.
Connector broken ........ A .. Require repair or replacement.
Connector loose ......... A .. Require repair or replacement.
Damaged (cut, burned, or
chafed) ................ A .. Require repair or replacement.
Excessive resistance .... B .. Require repair or replacement.
Fuse blown .............. A ............ Require replacement.
Fusible link blown ...... A ............ Require replacement.
Open .................... A .. Require repair or replacement.
Poor ground ............. A .. Require repair or replacement.
Routed incorrectly ...... B .. Require rerouting according to
vehicle manufacturer's
specifications.
Shorted ................. A .. Require repair or replacement.
Terminal bent ........... A .. Require repair or replacement.
Terminal broken ......... A .. Require repair or replacement.
Terminal corroded ....... A .. Require repair or replacement.
Terminal loose .......... A .. Require repair or replacement.









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BALL JOINTS
Before requiring or suggesting ball joint replacement, the
approved OEM procedure must be used to measure ball joint wear. The
measurement(s) obtained, along with the vehicle manufacturer's
specifications, must be noted on the inspection report. Some states
require that these measurements also appear on the invoice.
NOTE: The term "perceptible movement," defined as any visible
movement in any direction, has been the industry standard
for determining the need for replacement of follower ball
joints. Some vehicle manufacturers are now publishing
specifications for follower ball joints that were