battery LAND ROVER DISCOVERY 1995 Workshop Manual

HEATING AND VENTILATION
1
REPAIR HEATER BLOWER SWITCH AND ILLUMINATION
BULB
Service repair no - 80.10.22 - Switch
Service repair no - 86.48.73 - Bulb
Remove
1.Pull 3 knobs from rotary controls.
2.Pull knob from blower switch.
3.Remove 2 screws retaining graphics panel.
4.Remove graphics plate.
5.Remove capless bulb.
6.Remove 4 screws retaining switch.
7.Remove switch panel. Use plastic tube to assist
removal.
Blower switch
8.Pull blower switch from rear of panel.
9.Disconnect multiplug and remove blower switch.
Refit
10.Reverse removal procedure.HEATER CONTROL UNIT
Service repair no - 80.10.42.
Remove
1.Disconnect battery negative lead.
2.Pull 3 knobs from rotary controls.
3.Pull knob from blower switch.
4.Remove 2 retaining screws and remove
graphics panel.
5.Remove 4 screws retaining switch.
6.Remove switch panel.
7.Release fascia centre louvre vent panel from its
fitted position to gain access to rear of panel.
See CHASSIS AND BODY, Repair, Dash
Panel Central Louvre Panel

80HEATING AND VENTILATION
6
REPAIR BLOWER MOTOR UNIT - HEATER AND AIR
CONDITIONING
Service repair no - 80.20.17
Service repair no - 82.25.54.
Remove
1.Move seats to rear most position.
2.Disconnect battery negative lead.
3.Remove fascia panel assembly.
See CHASSIS
AND BODY, Repair, Dash Panel Assembly
4.Remove 2 nuts securing lower brackets to
toeboard.
5.Manoeuvre blower unit from heater unit and
remove.
Refit
6.Reverse removal procedure. Ensure seal
between blower and heater unit is tight.BLOWER MOTOR
Service repair no - 80.20.17
Service repair no - 82.25.33.
Remove
1.Remove blower motor unit.
See Blower Motor
Unit - Heater and Air Conditioning
2.Release wiring harness retaining clip.
3.Remove 3 screws securing casing.
4.Remove blower motor assembly.

82AIR CONDITIONING
2
REPAIR PERIODIC MAINTENANCE
Routine servicing, apart from visual checks, is not
necessary. The visual inspections are as follows:
Condenser
With a water hose or air line, clean the fins of the
condenser to remove flies, leaves, etc. Check the pipe
connections for signs of oil leakage.
Compressor
Check pipe connections for signs of oil leakage.
Check flexible hoses for swelling. Examine the
compressor belt for tightness and condition.
Sight glass and Receiver/Drier
Examine the sight glass for bubbles with the system
operating. Check connections for leakage.
Evaporator
Examine the refrigeration connections at the unit. If
the system should develop a fault, or if erratic
operation is noticed,
See Fault diagnosis,
Refrigeration System Faults
RECEIVER DRIER
Service repair no - 82.17.01
Remove
CAUTION: If receiver/drier is to be refitted,
the ports must be blanked off immediately
on disconnection. Exposed life of unit is
only 15 minutes.
1.Disconnect battery negative lead.
2.Recover refrigerant from system.
See
Adjustment, Refrigerant Recovery Recycling
Recharging
WARNING: Wear eye and hand protection
when disconnecting components
containing refrigerant. Plug all exposed
connections immediately.
3.Remove 3 screws from bonnet locking platform
and remove radiator grille.
Automatic gearbox
4.Remove 4 bolts securing transmission oil cooler
to body.

82AIR CONDITIONING
4
REPAIR AIR CONDITIONING SWITCH
Service repair no - 82.20.29
Remove
1.Remove fascia centre louvre vent panel.
See
CHASSIS AND BODY, Repair, Dash Panel
Central Louvre Panel
2.Disconnect multiplug from switch
3.From the rear, push switch out of panel.
Refit
4.Reverse removal procedure.DUAL PRESSURE SWITCH
Service repair no - 82.20.20
Remove
1.Disconnect battery negative lead.
2.Recover refrigerant from system.
See
Adjustment, Refrigerant Recovery Recycling
Recharging
3.Disconnect multiplug from switch.
4.Unscrew switch from adapter. Use a second
wrench to support adapter.
WARNING: Wear eye and hand protection
when disconnecting components
containing refrigerant. Plug all exposed
connections immediately.
5.Remove 'O' ring from switch.
Refit
6.Reverse removal procedure. Lubricate new 'O'
ring with refrigerant oil and fit to switch.
7.Screw switch into adapter and tighten to
11 Nm.
8.Evacuate and recharge air conditioning system.
See Adjustment, Refrigerant Recovery
Recycling Recharging

AIR CONDITIONING
5
REPAIR COMPRESSOR
Service repair no - 82.10.20
Remove
1.Disconnect battery negative lead.
2.Recover refrigerant from air conditioning system.
See Adjustment, Refrigerant Recovery
Recycling Recharging
3.Remove screws retaining centre panel to fan
cowl
4.Remove centre panel.
V8i engine illustrated
5.Remove 2 bolts securing hose flanges to
compressor.
WARNING: Wear eye and hand protection
when disconnecting components
containing refrigerant. Plug all exposed
connections immediately.6.Disconnect high pressure hose from
compressor.
7.Disconnect low pressure hose from compressor.
8.Remove 'O' ring from each flange.
9.Disconnect electrical lead from compressor
clutch.
10.Release drive belt from compressor pulley.
See
ENGINE, Repair, Drive Belt
11.Remove 4 bolts securing compressor to
mounting bracket.
12.Remove compressor from mounting bracket.
Refit
13.New compressor to be fitted: Drain oil from new
compressor outlet port. Drain and measure oil
from old compressor. Measure new oil equal to
amount drained from old compressor, add 30 ml
extra to this amount and refill new compressor
through outlet port.
14.Locate compressor in mounting bracket, fit bolts.
Tighten to
25 Nm.
15.Connect electrical lead to compressor clutch.
16.Fit new 'O' rings to high and low pressure hose
flanges, lubricate with refrigerant oil.
17.Engage hose flanges, fit bolts. Tighten to
10
Nm.
18.Fit compressor drive belt.See ENGINE, Repair,
Drive Belt
19.Fit centre panel to fan cowl.
20.Evacuate and recharge air conditioning system.
See Adjustment, Refrigerant Recovery
Recycling Recharging
21.Perform a leak test on disturbed joints.
22.Carry out a functional check.

82AIR CONDITIONING
6
REPAIR CONDENSER
Service repair no - 82.15.07
Remove
1.Disconnect battery negative lead.
WARNING: Wear eye and hand protection
when disconnecting components
containing refrigerant. Plug all exposed
connections immediately.
2.Recover refrigerant from system.
See
Adjustment, Refrigerant Recovery Recycling
Recharging
3.Remove front grille panel.
4.Remove battery.
See ELECTRICAL, Repair,
Battery
5.Remove radiator and oil coolers assembly.See
COOLING SYSTEM, Repair, Radiator
6.Disconnect high and low pressure pipes at
condenser unions.
7.Discard 'O' ring seal from each union.
8.Remove 2 bolts securing condenser to body.
9.Pull condenser into radiator area.
10.Disconnect multiplug from each fan lead.
11.Remove condenser assembly.
Do not carry out
further dismantling if component is removed
for access only.
Blank off inlet and outlet ports.

82AIR CONDITIONING
8
REPAIR HEATER AND COOLER UNIT
Service repair no - 86.25.21
WARNING: All work involving the service
and maintenance of air conditioning
requires special equipment, knowledge,
experience and a full awareness and adherence to
safety precautions.
Remove
1.Disconnect battery negative lead.
2.Drain engine coolant.
See COOLING SYSTEM,
Adjustment, Coolant
3.Recover refrigerant from air conditioning system.
See Adjustment, Refrigerant Recovery
Recycling Recharging
4.Remove fascia panel assembly.See CHASSIS
AND BODY, Repair, Dash Panel Assembly
5.Release clips and disconnect coolant hoses
from heater pipes.
6.Remove securing bolt and disconnect low
pressure pipe from evaporator.
WARNING: Wear eye and hand protection
when disconnecting components
containing refrigerant. Plug all exposed
connections immediately.
7.Release 'P' clip retaining high and low pressure
pipes.
8.Remove securing bolt and disconnect high
pressure pipe from evaporator.
9.Discard 'O' ring seals.

WIPERS AND WASHERS
5
REPAIR WINDSCREEN WIPER MOTOR AND LINKAGE
Service repair no - 84.15.12.
Remove
1.Disconnect battery negative lead.
2.Remove windscreen wiper arms.
See Wiper
arms - Windscreen
3.Remove securing nuts and steel and rubber
washer from wiper spindles.
4.Open the bonnet [hood].
5.Remove rubber seal from cowl flange.
6.Disconnect tubing from windscreen washer jets.
7.Remove centre bolt from cowl.
8.Remove retainers securing centre section of
cowl to outer sections.
9.Detach centre section of cowl.
10.Remove nut and bolt securing wiper motor
negative lead to body.
11.Remove five screws securing wiper
motor/linkage support plate.
12.Lift assembly clear of bulkhead, disconnect
wiper motor multi-plug and withdraw assembly.
13.Remove wiper motor spindle nut and release
rotary connecting link from spindle.
14.Remove wiper motor retaining bolts and
withdraw negative lead and wiper motor from
support plate.
15.The linkage arms can be detached by removing
the retaining clips and withdrawing the arms and
washers.
Note location of plain and wavy washers for
reassembly purposes.

84WIPERS AND WASHERS
6
REPAIR Refit
16.Reverse removal procedure.
17.Fit wiper motor to support plate using new
sealing bushes at the motor spindle as
necessary.
18.When positioning assembled motor and support
plate use a new seal and bushes, if necessary.
REAR DOOR WIPER MOTOR
Service repair no - 84.35.12.
Remove
1.Disconnect battery negative lead.
2.Remove rear door trim panel.
3.Remove spare wheel.
4.Remove wiper arm and grommet.
5.Remove nut, plain washer and seal from drive
spindle.
6.From inside the door, disconnect wiper motor
leads from door harness at multi-plug.
7.Remove bolts securing wiper motor mounting
bracket and negative lead to inner door panel.
8.Withdraw motor spindle from outer door panel
and manoeuvre wiper motor from door casing
complete with the spindle spacer.
9.Remove two rubber mounted nuts securing
mounting bracket to motor and detach bracket.
Refit
10.Reverse removal procedure. 1 to 9.
NOTE: If a new wiper motor assembly has
been fitted, before fitting the wiper arm.
Reconnect battery negative lead. Operate
wiper motor to ensure that motor spindle is in
park position.

ELECTRICAL
1
DESCRIPTION AND OPERATION ELECTRICAL EQUIPMENT
DESCRIPTION
The electrical system is Negative ground, and it is
most important to ensure correct polarity of the
electrical connections at all times. Any incorrect
connections made when reconnecting cables may
cause irreparable damage to the semi-conductor
devices used in the generator and regulator. Incorrect
polarity would also seriously damage any
transistorized equipment such as radio and
tachometer etc.
WARNING: During battery removal or
before carrying out any repairs or
maintenance to electrical components
always disconnect the battery negative lead first.
If the positive lead is disconnected with the
negative lead in place, accidental contact of the
wrench to any grounded metal part could cause a
severe spark, possibly resulting in personal
injury. Upon installation of the battery the positive
lead should be connected first.
GENERATOR
The generator is a three phase, field sensed unit. The
rotor and stator windings produce three phase
alternating current, AC, which is rectified to direct
current, DC. The electronic voltage regulator unit
controls the generator output voltage by high
frequency switching of the rotor field circuit. Use only
the correct Vehicle replacement fan belt. Occasionally
check that the engine and generator pulleys are
accurately aligned.
It is essential that good electrical connections are
maintained at all times. Of particular importance are
those in the charging circuit (including those at the
battery) which should be occasionally inspected to
see that they are clean and tight. In this way any
significant increase in circuit resistance can be
prevented.Do not disconnect battery cables while the engine is
running or damage to the semi-conductor devices
may occur. It is also inadvisable to break or make any
connections in the generator charging and control
circuits while the engine is running.
The electronic voltage regulator employs micro-circuit
techniques resulting in improved performance under
difficult service conditions. The whole assembly is
encapsulated in silicone rubber and housed in an
aluminium heat sink, ensuring complete protection
against the adverse effects of temperature, dust, and
moisture etc.
The regulating voltage is set during manufacture to
give the required regulating voltage range of 14.2±
0.2 volts, and no adjustment is necessary. The only
maintenance needed is the occasional check on
terminal connections and wiping with a clean dry
cloth.
The generator system provides for direct connection
of a charge (ignition) indicator warning light, and
eliminates the need for a field switching relay or
warning light control unit. As the warning lamp is
connected in the charging circuit, lamp failure will
cause loss of charge. Lamp should be checked
regularly and spare carried.
When using rapid charge equipment to re-charge the
battery, the battery must be disconnected from the
vehicle.
NOTE: For description and operation of
electrical circuits see separate publication:
Electrical Troubleshooting Manual.