horn LAND ROVER DEFENDER 1996 Workshop Manual

04GENERAL SPECIFICATION DATA
8
INFORMATION Fuses
Type Autofuse (blade type) blow ratings to suit individual.................................................................................
circuits
Horns
Make/type Mixo TR99........................................................................
Starter motor
Make and type Bosch 12v.................................................................
BULBS
REPLACEMENT BULBS TYPE
Headlamps 12V 60/55W Halogen
Front side lamps 12V 5W bayonet
Side repeater lamps 12V 5W capless
Tail lamps 12V 5/21W bayonet
Direction indicator lamps 12V 21W bayonet
Number plate lamp 12V 5W capless
Reverse lamp 12V 21W bayonet
Rear fog guard lamp 12V 21W bayonet
Interior roof lamps 12V 10W festoon
Instrument illumination 12V 1.2W capless
Warning light panel 12V 1.2W bulb/holder unit
Hazard warning switch 12V 1.2W capless
CAUTION: The fitting of new bulbs with wattages in excess of those specified will result in damage
to vehicle wiring and switches.

MAINTENANCE
1
MAINTENANCE SERVICE SCHEDULE
The following section describes the items detailed in
the vehicle Service Schedule. Where required
instructions are given for carrying out the service
procedure, or a cross reference is given to the section
in the manual where the procedure may be found.
Service Maintenance Schedules are published
separately to reflect the needs and intervals for each
vehicle variant. Procedures in the Workshop Manual
must be used in conjunction with the Service
Schedule sheets.
Service Maintenance Schedules are available from:
Land Rover Publications,
Character Mailing,
Heysham Road,
Bootle,
Merseyside, L70 1JL
VEHICLE INTERIOR
CHECK SEATS & BELTS
Check condition and security of seat belts, seat belt
mountings, seat belt buckles and operation of inertia
seat belts.
CHECK OPERATION OF LAMPS
Check operation of all lamps, horns and warning
indicators.
CHECK OPERATION OF WIPERS
Check operation of front/rear wipers and washers and
condition of wiper blades.CHECK OPERATION OF HANDBRAKE
Handbrake check/adjust
1.Chock road wheels.
2.Raise one rear wheel clear of ground and
support securely with axle stand.
3.Release handbrake lever.
4.Underneath vehicle, tighten adjuster bolt
clockwise to
25 Nm (18 lbf/ft)to fully lock brake
drum.
5.Slacken adjusting bolt by 1.5 turns to give brake
shoes running clearance. Check that the drum is
free to rotate.
6.Adjust handbrake cable locknuts to give pawl
two notches free movement on the rachet before
being fully operational on third notch of rachet.
NOTE: Cable adjustment must ONLY be
used for initial setting and to compensate
for cable stretch. It MUST NOT be used to
take up brake shoe wear, which MUST be adjusted
at brake drum.
7.Operate handbrake to settle brake shoes.
Recheck handbrake is fully operational on third
notch of rachet pawl. Readjust if necessary.
8.Remove axle stand and wheel chocks.

ELECTRICAL
3
DESCRIPTION AND OPERATION Door and bonnet switches
Perimetric protection for the vehicle is provided by
ECU inputs connected to the starter switch, bonnet
switch and door switches.
Ultrasonic sensor
The ultrasonic sensor operates by emitting an air
pressure carrier wave which is subsequently received
by the sensor as it bounces back from objects inside
the vehicle. Once armed, the alarm will sound if wave
is disturbed by a door opening, or if movement is
detected inside the vehicle.
When the volumetric sensor is activated it monitors
movement within the vehicle for 15 seconds before
detecting and responding to intrusions. If the sensor
detects movement it delays arming until a quiet period
has lapsed; if continuous movement is detected, the
alarm will not arm volumetrically.
NOTE: Interior protection will not operate
until 15 seconds after alarm is set.
The ultrasonic sensor is positioned in a different
location, according to vehicle type, as follows:
·90/110 Station Wagon - RH cantrail trim
·90/110 Pick-up - On headlining, between interior
lamp and rear view mirror
·130 Crewcab - On headlining above RH door
Alarm sounder
Two types of alarm sounder can be fitted, one with a
battery back-up facility and or without battery back-up,
both providing an audible warning whenever the alarm
is triggered. The vehicle horn will also operate if the
alarm sounds.
The alarm sounder is fitted to LH inner front wing in
the engine compartment.
NOTE: Disconnecting the battery on
vehicles fitted with the battery backed-up
facility will result in the alarm sounding, if
correct procedure has not been followed.Engine immobilisation warning light
The engine immobilisation warning light is located on
the instrument panel, and provides a visual indication
that the engine is immobilised.
Anti-theft alarm indicator light
The anti-theft alarm indicator light is located on the
instrument panel, between the fuel and coolant
temperature indicators, and provides a visual
indication of the alarm/ immobiliser status.

ELECTRICAL
5
DESCRIPTION AND OPERATION REV: 05/99 ALARM SYSTEM OPERATION
Arming alarm
To arm the alarm, aim handset at vehicle and press
the RH button (Padlock symbol). Provided all doors
and or apertures are closed, the direction indicator
lamps will flash three times to confirm that the alarm is
armed. All security features previously described will
be active.
Once armed, the alarm will sound if a door or the
bonnet is opened, or if movement is detected inside
the vehicle.
Disarming alarm
Within range of the vehicle, briefly press the LH
(Plain) button on the handset; the direction indicator
lamps will flash once to indicate that the alarm has
been disarmed and the engine re-mobilised.
NOTE: In some territories, the interior
lamps will illuminate when the alarm is
disarmed.
If the direction indicators fail to flash when the
alarm is armed:
This indicates that a door or the bonnet is not fully
closed, in which case the alarm will be partially armed
and engine immobilised, but interior protection will not
be active.
Once the open door or bonnet is closed, the direction
indicators will flash three times and the alarm will fully
arm as described previously.
If the alarm sounds:
The vehicle horn and alarm sounder will operate
continuously for 30 seconds when the alarm is
triggered. The horn and alarm sounder can be
triggered up to three times.
To silence the alarm, press either handset button. If
the handset is inoperative, the alarm can only be
disarmed by entering the emergency key access
code, seeEngine immobilisation override.Anti-theft alarm indicator light
A RED indicator light on the instrument panel
indicates the status of the alarm system. When the
alarm is armed successfully, the light flashes rapidly.
After 10 seconds, the light adjusts to a slower
frequency and continues flashing as an anti-theft
deterrent.
If the light fails to illuminate during the rapid flash
phase, this indicates a 'mislock' (door or the bonnet
not fully closed or key in starter switch). If this occurs,
the indicator light will still flash at slower frequency as
an anti-theft deterrent.
The indicator light will illuminate continuously under
the following conditions:
1.Alarm system armed and immobilised with
ignition 'on' or driver's door open.
2.Engine immobilised with ignition 'on' or driver's
door open.
Interior protection
Interior protection is activated automatically when the
alarm system is armed; twin sensors inside the
vehicle monitor interior space and will activate the
alarm if an intrusion is detected.
However, if passengers or animals are to be left inside
the vehicle, or if a window or sunroof is to be left
open, the alarm must be armed with the interior
protection DISABLED as follows:
To disable interior protection:
1.Open the driver's door.
2.Use the handset to arm the alarm in normal way.
3.Close the driver's door (the direction indicator
lamps will flash three times and the anti-theft
indicator light commences flashing rapidly). The
alarm system is now armed with the interior
protection disabled.
NOTE: Interior protection will not operate
until 15 seconds after the alarm is set.

ELECTRICAL
7
DESCRIPTION AND OPERATION ALARM SYSTEM FUSES
When the vehicle immobilisation and alarm system is
fitted, three fuses are used to protect the circuit:
·Alarm system 15 amp fuse, main harness, located
behind instrument binnacle.
·Alarm sounder 20 amp fuse No.10, located in main
fuse box.
·Alarm system 5 amp fuse No.20, located in main
fuse box.
The main fuse box is positioned in the centre of the
fascia, in front of the main gear lever. A label in the
fuse box cover shows the circuits protected, the fuse
rating and their locations. They are also listed below.
MAIN FUSE BOX
Fuse No. Value (amps) Electrical circuit
1 15 Hazard warning lights
2 20 Interior lamp, horn
3 15 Wipers & washers - rear
4 10 Wipers & washers - front
5 15 Heater
6 7.5 Rear fog guard lamps
7 5 Radio/cassette player
8 15 Heated rear window
9 10 Cigar lighter
10 20 Alarm sounder
11 7.5 Headlamp - RH, dipped beam
12 7.5 Headlamp - LH, dipped beam
13 7.5 Headlamp - RH, main beam
14 7.5 Headlamp - LH, main beam
15 5 Side lamps - LH
16 5 Side lamps - RH
17 15 Stop & reverse lamps
18 20 Air conditioning
19 5 Air conditioning
20 5 Alarm system

ELECTRICAL
9
DESCRIPTION AND OPERATION IMMOBILISATION AND ALARM SYSTEM CIRCUIT
DIAGRAM
1.Anti-theft alarm indicator light (LED)
2.Engine immobilisation warning light
3.Alarm system fuse - 15 amp
4.Alarm sounder relay
5.Under bonnet lighting fuse
6.Alarm sounder (without battery back-up)
7.Alarm system fuse - 5 amp (position 20)
8.Electronic control unit (ECU)
9.Bonnet switch
10.Alarm sounder protection fuse - 20 amp
(position 10)
11.Starter switch
12.Under bonnet ignition fuse
13.Driver's door switch
14.Vehicle horn switch
15.Vehicle horn
16.Passive coil
17.Starter switch relay
18.Front passenger door switch
19.Hazard warning light fuse - 15 amp (position 1)
20.Ultrasonic sensor
21.Interior lamp and horn fuse - 20 amp (position 3)
22.Alarm sounder (with battery back-up)
23.LH direction indicator lamps
24.RH direction indicator lamps
25.Interior lamp
26.Immobilisation spider
27.Rear side doors and rear door switches
28.Diagnostic connector
29.Diagnostic fuse - 7.5 amp
30.Starter solenoid
31.Fuel switch-off solenoid (injection pump)
32.Generator
33.AerialKey to cable colours
B-Black
G-Green
K-Pink
LG-Light Green
N-Brown
O-Orange
P-Purple
R-Red
S-Slate
U-Blue
W-White
Y-Yellow
The last letter of a colour code denotes the tracer
colour

ELECTRICAL
11
DESCRIPTION AND OPERATION IMMOBILISATION AND ALARM SYSTEM CIRCUIT
DIAGRAM - WITH DDS
1.Anti-theft alarm indicator light (LED)
2.Engine immobilisation warning light
3.Alarm system fuse - 15 amp
4.Alarm sounder relay
5.Under bonnet lighting fuse
6.Alarm sounder (without battery back-up)
7.Alarm system fuse - 5 amp (position 20)
8.Electronic control unit (ECU)
9.Bonnet switch
10.Alarm sounder protection fuse - 20 amp
(position 10)
11.Starter switch
12.Under bonnet ignition fuse
13.Driver's door switch
14.Vehicle horn switch
15.Vehicle horn
16.Passive coil
17.Starter switch relay
18.Front passenger door switch
19.Hazard warning light fuse - 15 amp (position 1)
20.Ultrasonic sensor
21.Interior lamp and horn fuse - 20 amp (position 3)
22.Alarm sounder (with battery back-up)
23.LH direction indicator lamps
24.RH direction indicator lamps
25.Interior lamp
26.Digital diesel shut-off valve (DDS)
27.Rear side doors and rear door switches
28.Diagnostic connector
29.Diagnostic fuse - 7.5 amp
30.Starter solenoid
31.Fuel shut-off solenoid (injection pump)
32.Generator
33.AerialKey to cable colours
B-Black
G-Green
K-Pink
LG-Light Green
N-Brown
O-Orange
P-Purple
R-Red
S-Slate
U-Blue
W-White
Y-Yellow
The last letter of a colour code denotes the tracer
colour

86ELECTRICAL
12
DESCRIPTION AND OPERATION VEHICLE ALARM SYSTEM BUILT-IN TEST
NOTE: The handset should be detached
from the key to allow perimetric testing of
the alarm system. The system will
automatically switch to volumetric testing if the
handset is in close proximity to the starter switch.
The built-in test procedure can be accessed providing
the following conditions exist:
Alarm disarmed.
Ignition 'off'.
Doors unlocked.
Bonnet closed.
With assistance, the test mode can be entered by
completing the following instructions within 5 seconds:
1.Open bonnet.
2.Turn starter switch 'on'.
3.Open driver's door (far enough to activate door
switch).
4.Turn starter switch 'off'.
5.Turn starter switch 'on'.
If the test mode has been correctly accessed, the
alarm sounder/horn will operate briefly and the
anti-theft alarm indicator and direction indicator lamps
will flash.
Perimetric tests
The anti-theft alarm indicator light and direction
indicator lamps will flash when:
1.Door switches are activated.
2.The bonnet is opened.
3.Key switches are activated.Volumetric tests
Press the LH (unlock) button or move the handset
close to the starter switch to disable perimetric testing
and enable volumetric testing. If movement is
detected within the vehicle by the ultrasonic sensor
the anti-theft alarm indicator and direction indicator
lamps will illuminate.
NOTE: Exit the anti-theft alarm built-in test
by turning the starter switch to the 'off'
position.
If the previously described conditions are not achieved
during the built-in test procedure, this would indicate a
fault in the alarm system. Before undertaking detailed
fault diagnosis procedures, first make visual checks of
components such as a faulty door switch or blown
alarm system fuse.

86ELECTRICAL
20
REPAIR WINDSCREEN WIPER/WASHER SWITCH
Service repair no - 84.15.34
Remove
1.Remove steering column nacelle
See
STEERING, Repair, Steering column nacelle.
2.Disconnect switch multi-plug from main harness.
3.Remove 2 screws and star washer securing
switch to mounting bracket.
4.Remove switch complete with harness.
Refit
5.Fit new switch to mounting bracket.
6.Reconnect switch multi-plug.
7.Fit steering column nacelle
See STEERING,
Repair, Steering column nacelle.
DIRECTION INDICATOR/HEADLAMP/HORN
SWITCH
Service repair no - 86.65.55
Remove
1.Remove steering column nacelle
See
STEERING, Repair, Steering column nacelle.
2.Disconnect 3 steering column switch multi-plugs
from main harness.
3.Slacken clamp screw and withdraw switch
assembly from steering column.
4.Remove fixings and detach windscreen
wiper/washer and main lighting switches from
mounting bracket.
5.Renew complete direction
indicator/headlamp/horn switch and switch
bracket assembly.
Refit
6.Fit main lighting and windscreen wiper/washer
switches to mounting bracket.
7.Position switch assembly on steering column
and fully tighten clamp.
8.Reconnect switch multi-plugs.
9.Fit steering column nacelle
See STEERING,
Repair, Steering column nacelle.