1988 JEEP CHEROKEE lock

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Page 920 of 1378

JEEP CHEROKEE 1988 Service Repair Manual 1 - 25 Amp
Rear Washer/Wiper
2 - 15 Amp
Radio, Cigarette Lighter
3 - 25 Amp
Blower Motor
4 - 20 Amp
Turn Signal, Back-Up Lights, Rear Window Defogger Rel

Page 932 of 1378

JEEP CHEROKEE 1988 Service Repair Manual hammer, tap end of drive shaft to loosen pressure plate, rotor, and
thrust plate assembly from body.
7) Lift pump body off rotor assembly. Flow control valve and
spring should slide out of bo

hammer, tap end of drive shaft to loosen pressure plate, rotor, and
thrust plate assembly from body.
7) Lift pump body off rotor assembly. Flow control valve and
spring should slide out of bore. Remove and discard end plate and
pressure plate "O" rings.
8) Using a screwdriver, pry drive shaft oil seal from body.
Lift pressure plate and cam ring from rotor. Remove rotor vanes.
9) Clamp drive shaft in soft-jawed vise, with rotor and
thrust plate facing up. Remove rotor lock ring from shaft. Use care
not to nick shaft or rotor. Slide rotor and thrust plate off shaft.
Remove shaft from vise.
CLEANING & INSPECTION
1) Clean all pump components (except drive shaft seal) in
clean solvent. Blow dry. Inspect flow control valve assembly for wear,
scoring, burrs or other damage. Inspect seal bore for burrs, nicks, or
score marks that would allow oil to by-pass outer seal surface.
2) Check all machined surfaces of body for scratches or burrs
which might allow leaks. Check "O" ring mating surfaces. Inspect pump
body drive shaft bushing for excessive wear.
3) If replacement is required, replace pump body and bushing
as an assembly. Inspect end cover "O" ring mating surface for nicks
and burrs. Polish with oil stone (if necessary).
4) Inspect rotor ring for roughness or irregularities. Use
oil stone to correct minor irregularities. Replace ring if outside cam
surface is worn or scored. Check thrust plate and pressure plate for
scoring and wear.
5) To remove light scoring, lap with crocus cloth until
surface is smooth and flat. Clean thoroughly. Check that vanes slide
freely but fit snugly into slots.
6) If vanes are loose in slots, replace rotor and/or vanes.
Scoring on rotor may be removed by lapping with crocus cloth. Clean
thoroughly.
REASSEMBLY
1) Lubricate all "O" rings, seals and seal surfaces with
power steering fluid. On Jeeps, lubricate "O" rings with petroleum
jelly. With pump on flat surface, drive new shaft seal in until it
bottoms on bore shoulder.
2) Clamp body in vise with shaft pointing down. Install end
plate and pressure plate "O" rings on body. Install body to reservoir
"O" rings. Install on pump body.
3) Place shaft, splined end up, in soft-jawed vise. Install
thrust plate on shaft with smooth, ported side up. Slide rotor,
counter bore down, over splines.
4) Install new rotor lock ring. Ensure ring is seated in
groove. Install 2 dowel pins into holes in pump cavity. Insert drive
shaft, rotor, and thrust plate assembly into pump cavity. Align
locating holes with dowel pins.
5) Slide cam ring over rotor and onto dowel pins, with arrow
on ring facing toward rear of housing. Install vanes in rotor slots
with radius edge facing out towards cam ring inner surface. Position
pressure plate on dowel pins with circular spring depression facing
rear of housing.
6) Using a 1 1/4" socket in groove of pressure plate, press
down on socket with both thumbs to seat assembly on "O" ring in pump
cavity. Place spring in groove in pressure plate. Place end cover lip
edge over spring.
7) Using thumb or arbor press, press end cover down below
retaining ring groove. Seat retaining ring in groove. Take care to
prevent cocking end cover in bore or distorting assembly.

Page 936 of 1378

JEEP CHEROKEE 1988 Service Repair Manual If test light glows, check tailgate window motor.
TAILGATE WINDOW MOTOR
Grand Wagoneer
1) Using a 12-volt test light, connect one end of test light
to ground and probe Tan

If test light glows, check tailgate window motor.
TAILGATE WINDOW MOTOR
Grand Wagoneer
1) Using a 12-volt test light, connect one end of test light
to ground and probe Tan wire at motor. Close safety switch and turn
tailgate window switch to "DOWN" position. If test light glows and
motor does not operate, replace motor. If test light does not glow,
check feed circuit to motor and repair as necessary.
2) Probe Brown wire at motor. Close safety switch and turn
tailgate window switch to "UP" position. If test light glows and motor
does not operate, replace motor. If test light does not glow, check
feed circuit to motor and repair as necessary.
SIDE WINDOW MASTER SWITCH CIRCUIT
1) Remove escutcheon and housing from master switch. Separate
terminal plate by releasing retainer hooks to expose terminal ends.
Turn ignition on.
2) Using a 12-volt test light, connect one lead to Black wire
and other lead to Red terminal. Repeat test at second Black wire. If
test light does not glow in either test, remove lead to Black terminal
and connect to chassis ground.
3) If test light glows, an open exists between master switch
and ground. If test light does not glow, it indicates a defective
circuit breaker or an opening in the Red wire from circuit breaker to
master switch.
SIDE WINDOW CONTROL SWITCH & MOTOR TEST
Grand Wagoneer
1) Connect test light between terminals of Orange and Yellow
wires. Operate control switch up and down. If test light glows in both
switch positions, wires, individual door and master switches are not
defective.
2) Disconnect White and Green motor leads at terminal plate,
and connect to Green and White leads. Operate master switch. If window
goes up and down, motor is okay, but switch is defective. If motor
does not operate, remove trim panel and check connections and leads to
motor. If motor operates, switch is defective.
SIDE WINDOW MOTOR
Connect test battery positive lead to one of the motor
terminals. Connect negative lead to other terminal. Motor should
rotate in one direction to go up or down. Reverse battery leads, motor
should rotate in opposite direction. If window does not move, replace
motor.
SWITCH VOLTAGE TEST
1) Turn ignition on. Remove switch from trim panel.
Disconnect terminal block on wiring harness from switch body. Connect
one lead of test light to Red wire terminal and other end to ground.
2) If test light glows, wiring between battery and switch is
functional. Check continuity in Black wire (ground). If test light
does not glow, check circuit breaker. If okay, check for a broken
wire.
SWITCH UP & SWITCH DOWN TEST

Page 950 of 1378

$JEEP CHEROKEE 1988 Service Repair Manual \003 SC HED ULE D S ER VIC ES - G ASO LIN E 1988 J e ep C hero ke e 1984-88 MAINTENANCE AMC/Jeep Maintenance & Service Intervals - Gasoline Jeep; Cherokee, Wagoneer$

\003
SC HED ULE D S ER VIC ES - G ASO LIN E

1988 J e ep C hero ke e
1984-88 MAINTENANCE
AMC/Jeep Maintenance & Service Intervals - Gasoline
Jeep; Cherokee, Wagoneer
* PLEASE READ THIS FIRST *
NOTE: All SERVICE SCHEDULES are listed for normal service
vehicles. If vehicle is operated under severe service
conditions, see SEVERE SERVICE REQUIREMENTS (PERFORM
W/SERVICE SCHEDULES) for items requiring additional
maintenance.
NOTE: This article contains scheduled maintenance service
information. Fluid types and capacities listed with each
service in this article are only those necessary to perform
that scheduled service. For specifications pertaining to
fluid capacities for the entire vehicle, fuse and circuit
breaker identification, wheel and tire size, battery type,
warranty information, or model identification refer to the
MAINTENANCE INFORMATION article in this section.
CAUTIONS & WARNINGS
AIR CONDITIONING MAINTENANCE
WARNING: NEVER add A/C refrigerant to correct a non-cooling problem
unless pressure gauges are connected to the system by a
certified technician. Lack of cooling may be caused by a
restriction, therefore adding refrigerant can cause a
dangerous pressure rise.
ANTI-LOCK BRAKE SYSTEM (If Equipped)
The anti-lock brake system contains electronic equipment that
can be susceptible to interference caused by improperly installed or
high output radio transmitting equipment. Since this interference
could cause the possible loss of the anti-lock braking capability,
such equipment should be installed by qualified professionals.
On models equipped with anti-lock brake systems, ALWAYS
observe the following cautions:
* DO NOT attempt to bleed hydraulic system without first
referring to the appropriate ANTI-LOCK BRAKE SYSTEM article
in the BRAKES Section.
* DO NOT mix tire sizes. As long as tires remain close to the
original diameter, increasing the width is acceptable.
Rolling diameter must be identical for all 4 tires. Some
manufacturers recommend tires of the same brand, style and
type. Failure to follow this precaution may cause inaccurate
wheel speed readings.
* Use ONLY recommended brake fluids. DO NOT use silicone brake
fluids in an ABS-equipped vehicle.
BATTERY WARNING
WARNING: When battery is disconnected, vehicles equipped with

Page 964 of 1378

$JEEP CHEROKEE 1988 Service Repair Manual Inspect Front Wheel Bearings (4WD) \b\ \ \ \ \ \$

Inspect Front Wheel Bearings (4WD)

\b\
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Check Operation of Horn, Wipers/Washers & All Exterior Lights

\b\
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Inspect Condition of Wiper Blades

\b\
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Check Headlight Alignment

\b\
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Check Seat Belt Webbing and Release Mechanisms

\b\
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Check Parking Brake Operation

\b\
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Check Shift/Clutch Interlock Operation

\b\
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Lubricate Weatherstripping with Silicone

\b\
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Lubricate Door Hinges

\b\
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Lubricate Door Locks

\b\
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Check Body Drain Holes

\b\
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Rotate Tires and Adjust Air Pressure

\
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Replace

\
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Engine Oil

\b\
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Oil Filter

\b\
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Automatic Transmission Fluid, Filter and Adjust Bands

\
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\

Lubrication Specifications

\
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\

Application Specification

Automatic Transmission .......................... Dexron-IIE ATF

Brake Master Cylinder .......... DOT 3 (SAE J-1703F) Brake Fluid

Engine Coolant ........... Alugard 340-2 & Water (50/50 Mixture)

Engine Oil (
1)

Gasoline Engine

Temperature Range

Above 30
F (-1
C) ........ SAE 20W-40 Or 20W-50 API SH/CD

Above 0
F (-18
C) ......... SAE 10W-30 Or 10W-40 API SH/CD

Less Than 60
F (16
C) ............... SAE 5W-30 API SH/CD

Drive Axles ................................ SAE 75W-90 API GL-5

Drive Axles (Trac-Lok) (
2) ................ SAE 80W-140 API GL-5

Drive Axles (Trailer Towing) .............. SAE 80W-140 API GL-5

Hydraulic Clutch ............... DOT 3 (SAE J-1703F) Brake Fluid

Manual Transmission ........................ SAE 75W-90 API GL-5

Parking Brake Cable Guides ................. NLGI Grade 2, GC-LB

Door & Hood Hinges ............................ Light Engine Oil

Manual Steering Box ............... Multi-Purpose NLGI Grade 2EP

Power Steering Pump ....................... Power Steering Fluid

Transfer Case ................................... Dexron-IIE ATF

Brake Caliper Bushings ........ GE 661 or DOW 111 Silicone Grease

Caliper Slide Pins ........... GE 661 or DOW 111 Silicone Grease

Wheel Bearings .................. Multi-Purpose NLGI Grade GC-LB

Drive Shaft U-Joints .............. Multi-Purpose NLGI Grade 2EP

Steering Linkage (
4)( 5) .................... NLGI Grade 2, GC-LB

Ball Joints (
4)( 6) ......................... NLGI Grade 2, GC-LB

Weatherstrip .......................... Silicone Spray Lubricant

Wheel Lug Nut Torque ...................... 95 ft. lbs. (129 N.m)

Page 973 of 1378

$JEEP CHEROKEE 1988 Service Repair Manual T5 (Borg-Warner) ............................. 4.5 Pts. (2.1L) \ Transfer Case 1985-86$

T5 (Borg-Warner) ............................. 4.5 Pts. (2.1L) \

Transfer Case

1985-86

Selec-Trac (229 Full-Time) ................. 6.0 Pts. (2.8L) \

Command-Trac (Part-Time 207) ............... 4.5 Pts. (2.1L) \

1987

Selec-Trac ................................. 2.5 Pts. (1.2L)

Command-Trac ............................... 2.2 Pts. (1.0L)

1988

Selec-Trac ................................. 3.0 Pts. (1.4L)

Command-Trac ............................... 2.2 Pts. (1.0L)

Drive Axles (
3)

Front ........................................ 2.5 Pts. (1.2L)

Front (Disconnect Housing) .................. 5.0 Ozs. (0.15L) \

Rear ......................................... 2.5 Pts. (1.2L)

Rear (Trac-Lok) (
4) .......................... 2.5 Pts. (1.2L)

(
1) - Capacities are recommended or calculated levels. Always use

dipstick (if available) to measure level.

(
2) - Includes 2.3 qts. for coolant recovery bottle.

(
3) - Fill to bottom of filler plug hole.

(
4) - Add 4 ozs. (118 ml) of Limited-Slip differential lubricant

additive first, then add new fluid.

\
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\
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\
\f

45,000 MILE (72,000 KM) SERVICE
45,000 MILE (72,000 KM) SERVICE\
\
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\
\

Service Or Inspect

\
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\
\
\
\

Verify Last Major Service Was Performed

\b\
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\
\
\

Check Fluid Levels

\b\
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Check Fuel Lines, Connections

\b\
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Check Cooling System Hoses and Clamps

\b\
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Check Coolant Strength

\b\
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Clean Battery and Battery Terminals

\b\
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Accessory Drive Belts

\b\
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Check Exhaust System & Heat Shielding

\b\
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\
\

Check Operation of Horn, Wipers/Washers & All Exterior Lights

\b\
\
\
\
\
\
\

Inspect Condition of Wiper Blades

\b\
\
\
\
\
\
\

Check Headlight Alignment

\b\
\
\
\
\
\
\

Check Seat Belt Webbing and Release Mechanisms

\b\
\
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\
\
\
\

Check Parking Brake Operation

\b\
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\
\
\
\

Check Shift/Clutch Interlock Operation

\b\
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Inspect C/V Joint boots (4WD)

\b\
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Inspect Underside of Vehicle (Bolts & Threaded Fasteners)

Page 974 of 1378

$JEEP CHEROKEE 1988 Service Repair Manual \b\ \ \ \ \ \ \ Check/Lube Manual Steering Gear$

\b\
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Check/Lube Manual Steering Gear

\b\
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Check Drive Shaft Seals

\b\
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Lubricate Ball Joints, Steering Linkage & Suspension

\b\
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Lube Drive Shaft U-Joints and Slip Splines

\b\
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Lube Front Axle Drive Joint and Pivot Bearings (4WD)

\b\
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Lube Parking Brake Ratio Lever Pivot

\b\
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Lube Manual Gearshift Control (4WD Transfer Case)

\b\
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Inspect/Repack Front Wheel Bearings (2WD Models)

\b\
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Inspect Front Brake Pads & Rotors

\b\
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Lubricate Caliper Slide Rails

\b\
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Inspect Rear Brake Linings & Drums

\b\
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Inspect Brake System Hoses & Lines

\b\
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Inspect Shocks for Leakage

\b\
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Inspect Tire Wear Pattern

\b\
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Lubricate Weatherstripping with Silicone

\b\
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\
\
\
\

Lubricate Door Hinges

\b\
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\
\
\
\
\

Lubricate Door Locks

\b\
\
\
\
\
\
\

Check Body Drain Holes

\b\
\
\
\
\
\
\

Rotate Tires and Adjust Air Pressure

\
\
\
\
\
\
\

Replace

\
\
\
\
\
\
\

Engine Oil

\b\
\
\
\
\
\
\

Oil Filter

\b\
\
\
\
\
\
\

Automatic Transmission Fluid, Filter and Adjust Bands

\b\
\
\
\
\
\
\

Flush and Fill Engine Coolant, if not done in last 36 months

\
\
\
\
\
\
\

Lubrication Specifications

\
\
\
\
\
\
\

Application Specification

Automatic Transmission .......................... Dexron-IIE ATF

Brake Master Cylinder .......... DOT 3 (SAE J-1703F) Brake Fluid

Engine Coolant ........... Alugard 340-2 & Water (50/50 Mixture)

Engine Oil (
1)

Gasoline Engine

Temperature Range

Above 30
F (-1
C) ........ SAE 20W-40 Or 20W-50 API SH/CD

Above 0
F (-18
C) ......... SAE 10W-30 Or 10W-40 API SH/CD

Less Than 60
F (16
C) ............... SAE 5W-30 API SH/CD

Drive Axles ................................ SAE 75W-90 API GL-5

Page 984 of 1378

JEEP CHEROKEE 1988 Service Repair Manual 1987

Selec-Trac ................................. 2.5 Pts. (1.2L)

Command-Trac ............................... 2.2

1987

Selec-Trac ................................. 2.5 Pts. (1.2L)

Command-Trac ............................... 2.2 Pts. (1.0L)

1988

Selec-Trac ................................. 3.0 Pts. (1.4L)

Command-Trac ............................... 2.2 Pts. (1.0L)

Drive Axles (
3)

Front ........................................ 2.5 Pts. (1.2L)

Front (Disconnect Housing) .................. 5.0 Ozs. (0.15L) \

Rear ......................................... 2.5 Pts. (1.2L)

Rear (Trac-Lok) (
4) .......................... 2.5 Pts. (1.2L)

(
1) - Capacities are recommended or calculated levels. Always use

dipstick (if available) to measure level.

(
2) - Includes 2.3 qts. for coolant recovery bottle.

(
3) - Fill to bottom of filler plug hole.

(
4) - Add 4 ozs. (118 ml) of Limited-Slip differential lubricant

additive first, then add new fluid.

\
\
\
\
\
\
\
\f

75,000 MILE (120,000 KM) SERVICE
75,000 MILE (120,000 KM) SERVICE\
\
\
\
\
\
\

Service Or Inspect

\
\
\
\
\
\
\

Verify Last Major Service Was Performed

\b\
\
\
\
\
\
\

Check Fluid Levels

\b\
\
\
\
\
\
\

Check Fuel Lines, Connections

\b\
\
\
\
\
\
\

Check Cooling System Hoses and Clamps

\b\
\
\
\
\
\
\

Check Coolant Strength

\b\
\
\
\
\
\
\

Check Exhaust System & Heat Shielding

\b\
\
\
\
\
\
\

Clean Battery and Battery Terminals

\b\
\
\
\
\
\
\

Adjust Drive Belt Tension

\b\
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\
\
\
\
\

Inspect Brake System

\b\
\
\
\
\
\
\

Check Operation of Horn, Wipers/Washers & All Exterior Lights

\b\
\
\
\
\
\
\

Inspect Condition of Wiper Blades

\b\
\
\
\
\
\
\

Check Headlight Alignment

\b\
\
\
\
\
\
\

Check Seat Belt Webbing and Release Mechanisms

\b\
\
\
\
\
\
\

Check Parking Brake Operation

\b\
\
\
\
\
\
\

Check Shift/Clutch Interlock Operation

\b\
\
\
\
\
\
\

Inspect C/V Joint boots (4WD)

\b\
\
\
\
\
\
\

Inspect Underside of Vehicle (Bolts & Threaded Fasteners)

\b\
\
\
\
\
\
\

Check/Lube Manual Steering Gear

\b\
\
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\

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