electrical LAND ROVER DISCOVERY 1995 Workshop Manual

ELECTRICAL
33
REPAIR INSTRUMENT BINNACLE COMPONENTS
1. Instrument cowl
2. Face plate
3. Fuel gauge
4. Speedometer
5. Instrument binnacle
6. Screw - securing circuit board
7. Circuit board8. Tachometer
9. Temperature gauge
10. Illumination board
11. Screw securing illumination board
12. Circuit board - instrument illumination
13. Instrument illumination bulb holder and bulb
14. Speedometer trip reset button sleeve
15. Screw - cowl and binnacle

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34
REPAIR PRINTED CIRCUIT AND WARNING LIGHTS
1. Panel illumination bulbs
2. Transmission oil temperature warning lamp bulb
3. Hazard warning lamp bulb
4. Check engine warning lamp bulb
5. Handbrake/brake fluid warning lamp bulb
6. ABS warning lamp bulb
7. Headlamp main beam warning lamp bulb
8. Trailer direction warning lamp bulb9. Direction indicator warning lamp bulb
10. Air suspension warning lamp bulb
11. Ignition/no charge warning lamp bulb
12. Seat belt warning lamp bulb
13. Not used
14. Traction control warning lamp bulb
15. Diesel heater plug warning lamp bulb (if fitted)
16. Main printed circuit

ELECTRICAL
35
REPAIR INSTRUMENT COWL AND ILLUMINATION BOARD
Service repair no - 88.20.06 - Instrument cowl
Service repair no - 88.20.22 - Illumination board
Remove
1.Remove binnacle,
See Instrument binnacle
Instrument cowl
2.Remove bulb holder from binnacle.
3.Release 4 clips securing top of cowl to binnacle.
4.Release 3 clips securing bottom of cowl to
binnacle, remove cowl.
Illumination board
5.Release bulb holder wires from clip.
6.Remove screw securing illumination board to
cowl, remove board.Refit
Illumination board
7.Position illumination board to cowl, fit and tighten
screw.
8.Secure bulb holder wires in clip.
Instrument cowl
9.Ensure instrument face plate is correctly
positioned.
10.Position cowl to binnacle ensuring speedometer
trip passes through hole in cowl.
11.Secure cowl retaining clips.
12.Fit bulb holder in binnacle.
13.Fit binnacle.
See Instrument binnacle

86ELECTRICAL
36
REPAIR SPEEDOMETER
Service repair no - 88.30.01
Remove
1.Remove instrument cowl.
See Instrument
cowl and illumination board
2.Remove speedometer trip reset button sleeve.
3.Remove instrument face plate.
4.Remove 4 screws securing speedometer,
remove speedometer.
Refit
5.Reverse removal procedure.TACHOMETER
Service repair no - 88.30.21
Remove
1.Remove circuit board.
See Circuit board
2.Remove instrument cowl.See Instrument
cowl and illumination board
3.Remove speedometer trip reset button sleeve.
4.Remove instrument face plate.
5.Remove 3 screws securing tachometer to
binnacle, remove tachometer.
Refit
6.Reverse removal procedure.

ELECTRICAL
37
REPAIR COOLANT TEMPERATURE AND FUEL GAUGES
Service repair no - 88.25.14 - Coolant temperature
gauge
Service repair no - 88.25.26 - Fuel gauge
Remove
1.Remove instrument cowl.
See Instrument
cowl and illumination board
2.Remove speedometer trip reset button sleeve.
3.Remove instrument face plate.
Coolant temperature gauge
4.Remove circuit board,See Circuit board
5.Remove 3 screws securing coolant temperature
gauge to binnacle, remove gauge.
Fuel gauge
6.Remove 3 screws securing fuel gauge to
binnacle, remove gauge.
Refit
7.Reverse removal procedure.SPEEDOMETER TRANSDUCER
Service repair no - 88.30.14
Remove
1.Position vehicle on ramp and chock wheels.
2.Raise ramp.
3.Disconnect multiplug from transducer.
4.Remove bolt securing transducer, remove
transducer.
Refit
5.Reverse removal procedure.

86ELECTRICAL
38
REPAIR REVERSE LIGHT SWITCH
Service repair no - 37.27.01
Manual Gearbox
Remove
Reverse light switch is located at rear of selector
housing, accessible from beneath vehicle.
1.Place vehicle on suitable ramp.
2.Disconnect the battery negative lead.
3.Disconnect electrical leads.
4.Release lock-nut.
5.Remove switch.
NOTE: Reverse light switch requires
re-setting on reassembly.
6.Select reverse gear.
7.Connect 12 volt supply and test lamp across
switch terminals.
8.Screw switch into housing until test lamp is
illuminated. Screw switch in a further half turn,
tighten locknut.
9.Connect electrical leads.
10.Reconnect the battery negative lead.HEATER/VENTILATION AND AIR CONDITIONING
CONTROL PANEL BULB
Service repair no - 86.45.73
Remove
1.Carefully pull 3 rotary knobs off switches.
2.Prise blower speed control knob off lever.
3.Remove 2 screws securing panel, ease panel
away from fascia.
4.Pull bulb from holder.
5.Insert new bulb in holder.
Refit
6.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.

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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.

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REPAIR FOG LAMP - FRONT
Service repair no - 86.40.96
Remove
1.Locate and release lamp harness multiplug from
clip behind headlamp.
2.Disconnect multiplug.
3.Attach a draw string to harness.
4.Remove 2 nuts securing lamp bracket to bumper
studs.
5.Remove 2 screws securing lamp bracket to
spoiler.
6.Release lamp assembly and pull lamp harness
through front panel.
7.Detach draw string from harness.
8.Remove lamp/bracket assembly.
9.Remove 2 spire nuts from lamp bracket.
Refit
10.Reverse removal procedure.