1995 JEEP XJ coolant

²Remove windshield washer reservoir from fender
inner panel (Fig. 39).
²Remove the hood ajar switch, if equipped, from
fender (Fig. 40 and 41).
²Remove the Power Distribution Center (PDC), the
coolant recovery bottle and speed servo from fender
the inner panel (Fig. 42, 43 and 44).
Fig. 41 Hood Ajar Switch Removal/Installation
Fig. 42 Power Distribution Center and Vapor
Canister
Fig. 43 Coolant Recovery Bottle
Fig. 39 Coolant Recovery Bottle, Windshield Washer
Fluid Reservoir & Hood Support Rod
Fig. 40 Hood Ajar Switch, Speed Servo & A/C
Receiver/Drier
23 - 16 EXTERIOR COMPONENTSÐXJJ

²Install the retainers to attach the fender liner to
the fender inner panel.
²Install the rivets to attach the flare to the air de-
flector (Figs. 48 and 50). and
²Install the screws to attach the flare to the fender.
Tighten the screws to 1 Nzm (13 in-lbs) torque.
(8) Connect the front lamp wire harness connectors
to the engine wire harness connectors (Fig. 52).
(9) Install the front lamps.
(10) Install the front bumper.
(11) Install the wheel, remove the support and
lower the vehicle.
(12) Right fender only: install the hood support rod
on the fender inner panel.
(13) Install the hood bumper on the fender inner
panel.(14) Right fender only: install the Daytime Run-
ning Light (DRL) module on fender inner panel.
(15) Right fender only: install the A/C Receiver/
Drier on the fender inner panel.
(16) Right fender only: install the vapor canister
on the fender inner panel. Tighten the vapor canister
screws to 5 Nzm (45 in-lbs) torque.
(17) Right fender only: install the PDC, coolant re-
covery bottle and speed servo on the fender inner
panel.
(18) Right fender only: install the hood ajar switch,
if equipped. Tighten the screws to 2 Nzm (15 in-lbs)
torque.
(19) Right fender only: install the windshield
washer fluid reservoir on the inner panel.
(20) Right fender only: install the battery tray and
battery on the inner panel.
(21) Right fender only: if equipped, install the ra-
dio antenna. Tighten the nut/escutcheon to 4.5 Nzm
(40 in-lbs) torque. Tighten the power antenna bracket
screws to 2 Nzm (20 in-lbs) torque.
REAR WHEELHOUSE FLARES AND LINERSÐXJ
REMOVAL
(1) Remove the flare and liner lower screws (Fig.
53 and 54).
(2) Remove the nuts that attach the liner to the
wheelhouse.
(3) Remove the liner from the wheelhouse.
(4) Remove the push-nuts that attach the flare re-
tainers to the wheelhouse (Fig. 55).
(5) Remove the flare and retainers from the wheel-
house.
INSTALLATION
(1) Position the flare and retainers at the wheel-
house.
(2) Install the push-nuts to attach the flare retain-
ers to the wheelhouse.
(3) Position the liner in the wheelhouse.
Fig. 50 Fender Flare & Retainers
Fig. 51 Fender Liner and Retainers
Fig. 52 Front Lamp Wire Harness Connectors
JEXTERIOR COMPONENTSÐXJ 23 - 19

²Remove the horn from the fender inner panel (Fig.
7).
²Remove the windshield washer fluid reservoir and
coolant reserve bottle from the fender inner panel
(Fig. 8 and 9).(4) Right fender:
²Remove the jack and related tools from the jack
storage tray (Fig. 10).
²Remove the jack storage tray and A/C receiver/
drier from the fender inner panel (Fig. 11).
Fig. 7 Horn Removal/Installation
Fig. 8 Windshield Washer Fluid Reservoir
Fig. 9 Coolant Reserve Bottle
Fig. 10 Jack and Related Tools
Fig. 11 Jack Storage Tray and A/C Receiver/Drier
23 - 112 EXTERIOR COMPONENTSÐYJJ

(8) Left fender:
²Install the air cleaner housing and support bracket
on the fender inner panel.
²Install the horn on the fender inner panel.
²Install the windshield washer fluid reservoir and
coolant reserve bottle on the fender inner panel.
(9) Right fender:
²Install the jack storage tray and A/C receiver/drier
on the fender inner panel.
²Install the jack and related tools in the jack stor-
age tray (Fig. 17).
FENDER FLAREÐYJ
REMOVAL
(1) Remove the side marker lamp lens and discon-
nect the wire harness bulb socket.(2) Remove the serrated retainers, screws and
plastic nuts that attach the flare to the front fender
or rear wheelhouse (Fig. 18 and 19).
(3) Remove the flare and clean the contact surface
on the body.
(4) Inspect the flare serrated retainers and plastic
nuts. Replace any hardware that is loose or damaged.
INSTALLATION
(1) Clean the contact surface on the flare and posi-
tion it on the front fender or wheelhouse.
(2) Install the flare serrated retainers, screws and
nuts. Tighten the screw at the lower molding to 11
Nzm (96 in-lbs) torque. Tighten the upper screws to
11 Nzm (96 in-lbs) torque.
Fig. 16 Fender Splash Shields
Fig. 17 Jack Installation
Fig. 18 Front Fender Flare and Side Step Molding
Fig. 19 Rear Flare and license Plate Bracket
23 - 114 EXTERIOR COMPONENTSÐYJJ

HEATING AND AIR CONDITIONING
CONTENTS
page page
COMPONENT SERVICEÐXJ VEHICLES...... 23
COMPONENT SERVICEÐYJ VEHICLES...... 32
COMPRESSOR SERVICE.................. 19
GENERAL INFORMATION.................. 1
HEATING AND AIR CONDITIONING TEST
PROCEDURES......................... 15REFRIGERANT SERVICE AND PERFORMANCE
TEST................................ 11
TORQUE SPECIFICATIONS................ 37
WARNINGS, CAUTIONS AND SERVICE
PRECAUTIONS......................... 9
GENERAL INFORMATION
INDEX
page page
A/C Components.......................... 4
Heater and A/C Operation.................... 1
Manifold Gauge Set........................ 7Refrigerant............................... 7
Refrigerant Equipment...................... 7
HEATER AND A/C OPERATION
HEATERÐXJ
A blend-air heating system is used in XJ vehicles.
The temperature of heated air is controlled by regu-
lating the quantity of air flow through the heater
core. This is accomplished by blending outside air
with heated air from the heater core to obtain the de-
sired discharge temperature. A temperature control
lever on the heater control determines air flow
through the heater core. The lever uses a cable to op-erate the blend-air door. This door controls air flow
through the core. Vacuum motors are used to actuate
and position the remaining door in the system.
On left hand drive (LHD) XJ vehicles a water valve
controls coolant flow to the heater core. The valve is
vacuum operated. When vacuum is applied, the valve
opens and coolant is directed through the heater core
and back to the engine. When the water valve is
closed (no vacuum applied) coolant flow bypasses the
heater core back to the engine.
JHEATING AND AIR CONDITIONING 24 - 1

HEATERÐYJ
A blend-air heating system is used in YJ vehicles.
The blend-air system provides a constant flow of en-
gine coolant through the heater core.
The air control lever (Fig. 1) operates a door in the
fresh air intake duct. The door controls the amount
of fresh air flow into the heater housing and core.
When the lever is in the OFF position, the intake
door is closed preventing air flow into the housing.
The temperature control lever (Fig. 1) determines
air flow through the heater core. The lever operates
the heater housing blend-air door which controls air
flow through the core.The blower motor is operated by the control switch
(Fig. 1). The switch provides 3 blower speeds for in-
creased air flow in heat or defrost mode.
DEFROSTING
The heater housing has a defroster door to divert
heated air to the defroster duct and outlets (Fig. 2).
Defrost air flow is controlled by the air control lever.
For defroster operation, the air control lever must
be moved to the defrost detent. The detent is identi-
fied by the defrost symbol on the control panel. In
this position, the defroster door diverts the heated
air from the core to the defroster duct outlets.
If air control lever is moved to any position be-
tween heat and defrost, the defroster door does not
close completely. In this mode, the door remains par-
tially open causing heated air to be divided equally
between the heat and defrost outlets.
FRESH AIR VENTILATION
The fresh air ventilating system (Fig. 3) is operated
by the air control lever. When the lever is moved to
VENT position, outside air from the cowl intake
flows into the heater housing. Incoming air is di-
rected into the vehicle interior through vent doors in
the housing.
A door in the intake duct controls air flow into the
duct. The door is operated by a vacuum motor. The
Fig. 2 Heating System Components
Fig. 1 Heater Control Panel
JHEATING AND AIR CONDITIONING 24 - 3

oil until you are ready to use it. Install the cap im-
mediately after using. Store the oil only in a clean
moisture-free container.
Keep service tools and the work area clean. Con-
tamination of A/C system through careless work hab-
its must be avoided.
COOLING SYSTEM
To maintain the performance level of the heating/
air conditioning system, the engine cooling system
must be properly maintained.
The use of a bug screen is not recommended. Any
obstructions in front of the radiator or condenser can
reduce the performance of the A/C and cooling sys-
tem. If a bug screen is used it must be cleaned fre-
quently.
COOLANT PRECAUTIONS
WARNING: ANTIFREEZE IS AN ETHYLENE GLYCOL
BASE COOLANT AND IS HARMFUL IF SWAL-
LOWED OR INHALED. IF SWALLOWED, DRINK
TWO GLASSES OF WATER AND INDUCE VOMIT-
ING. IF INHALED, MOVE TO FRESH AIR AREA.
SEEK MEDICAL ATTENTION IMMEDIATELY.
WARNING: WASH SKIN AND CLOTHING THOR-
OUGHLY AFTER COMING IN CONTACT WITH ETH-
YLENE GLYCOL.
WARNING: KEEP OUT OF REACH OF CHILDREN
AND PETS.
WARNING: DO NOT OPEN A COOLING SYSTEM
WHEN THE ENGINE IS AT RUNNING TEMPERA-
TURE. PERSONAL INJURY CAN RESULT.WARNING: DO NOT STORE IN OPEN OR UN-
MARKED CONTAINERS.
WARNING: HOT ENGINE COOLANT CAN CAUSE
SEVERE BURNS. DO NOT OPEN THE RADIATOR
DRAIN COCK WHEN THE COOLING SYSTEM IS
HOT AND PRESSURIZED. ALLOW THE COOLANT
TO DECREASE TO ROOM TEMPERATURE BEFORE
STARTING REPAIR OPERATIONS.
The engine cooling system is designed to develop
internal pressure of 97 to 124 kPa (14 to 18 psi). Al-
low the vehicle 15 minutes to cool down (or until a
safe temperature and pressure are attained) before
opening the cooling system. Refer to Group 7, Cooling
System.REFRIGERANT HOSES/TUBES PRECAUTIONS
Kinks or sharp bends in the refrigerant tubing or
hoses will reduce the capacity of the entire system.
High pressures are produced in the system when it is
operating. Extreme care must be exercised to make
sure that all connections are pressure tight. Dirt and
moisture can enter the system when it is opened for
repair.
A good rule for the flexible hose lines is to keep the
radius of all bends at least 10 times the diameter of
the hose. Sharp bends will reduce the flow of refrig-
erant. The flexible hose lines should be routed so
they are at least 80 mm (3 inches) from the exhaust
manifold. It is a good practice to inspect all flexible
hose lines at least once a year to make sure they are
in good condition and properly routed.
24 - 10 HEATING AND AIR CONDITIONINGJ

(6) Test A/C blower switch HIGH terminal with
blower switch in HIGH, should be battery voltage. If
not, replace switch.
BLOWER MOTOR
The A/C blower motor is attached to the evaporator
housing mounted under the instrument panel. The
motor has a ground wire and 3 wires connect to the
motor brushes. When voltage is applied to the sepa-
rate brushes it provides the 3 blower speeds LO,
MED, and HIGH.
BLOWER MOTOR TEST
Turn ignition switch to RUN for voltage tests and
turn ignition switch to OFF for resistance test.
(1) Test A/C blower motor ground terminal should
be 0 ohms. If not, repair ground circuit.
(2) Test A/C blower motor connector LO terminal
with blower switch in LO, should be battery voltage.
If not repair open from blower switch. If the blower
motor is still inoperative replace motor.
(3) Test A/C blower motor connector MED terminal
with blower switch in MED, should be battery volt-
age. If not repair open from blower switch. If the
blower motor is still inoperative replace motor.
(4) Test A/C blower motor connector HIGH termi-
nal with blower switch in HIGH, should be battery
voltage. If not, repair open from blower switch. If the
blower motor is still inoperative, replace motor.
HEATER DIAGNOSIS
On LHD XJ vehicles a water valve controls coolant
flow to the heater core. The valve is vacuum oper-
ated. When vacuum is applied, the valve opens and
coolant is directed through the heater core and back
to the engine. When the water valve is closed (no
vacuum applied) coolant flow bypasses the heater
core back to the engine.
The heating system receives its battery feed from
the fuse box. On YJ vehicles the feed circuit runs to
the HEATER/OFF switch and then to the BLOWER
switch. On XJ vehicles the feed circuit runs to the
HEAT/MODE switch and then to the BLOWER
switch.
The blower speed is controlled by the blower switch
and blower resistors. With the switch in LO, battery
voltage is supplied to the motor through all of the re-
sistors. The motor runs slowly. When the blower
switch is moved to a higher speed, battery voltage in-
creases to the blower motor which increase its speed.
This is accomplished by bypassing some of the blower
resistors. When the switch is in HI, blower resistors
are bypassed and battery voltage is applied directly
to the blower motor.
The following chart has been developed for quick
reference.
Refer to the Group 8W Wiring Diagrams for com-
plete wiring schematic.
JHEATING AND AIR CONDITIONING 24 - 17