1995 LAND ROVER DISCOVERY battery replacement

BRAKES
1
FAULT DIAGNOSIS ABS FAULT DIAGNOSIS
If a fault has occurred, or has been identified by ECU
self diagnostic function and ABS warning light is
illuminated. The system and components must be
checked to locate and rectify fault, using Testbook
diagnostics.
NOTE: If warning lamp has indicated a
fault in system, and no fault code has been
stored in memory, cause of fault is:
a) Failure in electrical supply
b) Bad ECU ground
c) Faulty warning light relay
d) ECU not connected
Before commencing fault diagnosis procedure
following items must be checked:
1.Inspect all exposed cables for damage or
abrasion.
2.Check ground on ABS system.
3.Battery - state of charge.
4.Check hub end-float.
5.All ABS fuses and electrical connections.
Fault rectification
1.Complete harness should be replaced if faults
are found in wiring harness.
2.DO NOT use unspecified cables or connectors,
as this could jeopardise safe function of ABS.
3.DO NOT attempt to open sealed 35 way
connector to ECU.FAULT DIAGNOSIS PROCEDURE
NOTE: If ABS warning light illuminates due
to large sensor air gap, fault will be
retained by the ECU memory. Where wheel
sensors have been pushed fully home prior to
test, The ECU will indicate a fault that has been
rectified.
NOTE: After any steering adjustment,
bearing replacement/adjustment, brake
disc replacement: Check hub end-float and
sensor clearance.
RELAYS AND FUSES ABS
The location and identification of ABS electrical relays
are given in the Electrical Troubleshooting Manual
For location and identification of ABS electrical fuses.
See ELECTRICAL, Repair, Fuse Box - Interioror.
See ELECTRICAL, Repair, Fuse Box - Engine
Compartment

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.

ELECTRICAL
15
REPAIR Refit
9.If removed fit the mounting plate to the actuator.
10.Engage the actuator operating rod with hooked
end of the actuator link.
11.Fit the actuator and mounting plate to the door
and loosely secure with the four screws.
12.Set the mounting plate with the screws in the
centre of the slotted holes, then tighten the
screws.
13.Connect the actuator lead to the door harness.
14.Reconnect battery negative lead.
15.With the sill locking button held in position, set
the bellcrank to approximately the position it
would be in if the sill button was depressed to
half of its total movement.
16.At this setting check the electrical operation of
the door lock. Adjust the mounting plate as
necessary to achieve the correct setting. Fully
tighten the securing screws on completion.
17.Refit the vapour barrier.
18.Connect the sill button operating rod to the
bellcrank, hold in position, fit the door trim panel
and the door pull.
BULB REPLACEMENT
For bulb type and rating refer to rating shown on the
bulb or bulb replacement list.
See GENERAL
SPECIFICATION DATA, Information, Bulbs
HEADLIGHT
Service repair no - 86.40.02/13
Remove
1.Rotate three retaining clips 10 degrees, to align
with slots in headlight mounting plate.
2.Withdraw light unit
NOTE: Detach adjustment operating rod
on vehicles fitted with headlight levelling.3.Disconnect electrical multiplugs and remove
headlight unit.
4.Release spring clips and withdraw headlight
bulb.
Key
1. Headlight
2. Retaining clips
3. Bulb
4. Spring clip
5. Cover
6. Bulb sidelight
7. Plug
8. Plug sidelight
Refit
5.Reverse removal procedure.

ELECTRICAL
39
REPAIR CIGAR LIGHTER AND BULB
Service repair no - 86.65.60
Service repair no - 86.45.55
Cigar Lighter
Remove
1.Remove centre console.
See CHASSIS AND
BODY, Repair, Centre Console
2.Depress lugs securing cigar lighter, withdraw
lighter from centre console.
Bulb replacement
3.Remove bulb from holder.
Refit
4.Reverse removal procedure.OIL PRESSURE WARNING SWITCH - V8i
Service repair no - 86.65.30
Remove
1.Disconnect the battery negative lead.
2.Disconnect electrical lead.
3.Unscrew switch unit.
4.Remove switch and sealing washer.
Refit
5.Reverse removal procedure. Using a NEW
sealing washer.

86ELECTRICAL
40
REPAIR INSTRUMENT ILLUMINATION ELECTRONIC
DIMMER/RHEOSTAT
Service repair no - 86.65.07
Electronic dimming control switch is located in
instrument panel finisher. Rotate control to vary
intensity of illumination.
Remove
1.Disconnect the battery negative lead.
2.Remove instrument panel finisher.
See
CHASSIS AND BODY, Repair, Instrument
Panel Finisher
3.Remove 2 screws securing rheostat, remove
rheostat.
Refit
4.Reverse removal procedure.WINDOW LIFT/HEATED SEAT CUSHION
SWITCHES AND BULBS
Service repair no - 86.25.16 - Switches
Service repair no - 86.45.29 - Bulb
Switch Replacement
1.Disconnect the battery negative lead.
2.Carefully release rear of surround from centre
console.
3.Remove screws, pry window lift switch surround
from glove box.
4.Disconnect multi-plug(s) at rear of switch(es).
5.Apply pressure to rear of switch, push it through
surround.
Bulb replacement
6.Identify bulb to be replaced and remove
appropriate switch.
7.Rotate bulb holder 90°and withdraw it from
switch; discard bulb and holder.
Refit
8.Reverse removal procedure.

ELECTRICAL
41
REPAIR COOLANT TEMPERATURE TRANSMITTER - V8i
Service repair no - 26.10.02
Remove
1.Disconnect battery negative lead.
2.Disconnect lead from transmitter.
3.Remove transmitter, discard sealing washer if
fitted.
Refit
4.Coat threads of replacement transmitter with
Loctite 572.
5.Fit a new sealing washer to transmitter.
6.Fit transmitter, connect lead.
7.Top-up cooling system.HEATED FRONT SCREEN
Heated front screen will operate when switch is
operated, with engine running. Timer unit will provide
a preset time cycle of 7« minutes±20%.
To identify timer unit.
See Electrical Trouble
Shooting Manual.Electrical Troubleshooting
Manual
Switching OFF ignition, or further operation of heated
front screen switch during cycle will switch off screen
and cancel, reset and switch off timer unit.