Land Rover Discovery 99my To 03my Electrical Library 3rd Edition Rover Manual

DESCRIPTION AND OPERATION
4.130DISCOVERY SERIES II
Ignition switch supply
With the ignition switch in position I or II, a feed is connected from the ignition switch to the 
passenger compartment fusebox on an LGW wire.
The feed passes through fuse 26 in the passenger compartment fusebox and is connected 
on an LG wire to the coil of the auxiliary circuits relay in the engine compartment fusebox. 
This energises the coil and closes the relay contacts. The coil is earthed on a B wire from 
the engine...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.131
Interior lamps - Manual operation
The feed from fuse 20 in the passenger compartment fusebox is connected to the header 
C0289 LHD/C0294 RHD. From the header the feed is connected on a P wire to header 
C0723. Three feeds on P wires are connected from header C0723 to the front interior lamp, 
the rear interior lamp and the load space lamp.
On Korean vehicles only, two feeds on P wires are connected from header C0723 to the rear 
interior lamp and the...

DESCRIPTION AND OPERATION
4.132DISCOVERY SERIES II
The earth paths for the LH or RH (passenger) door switch, tail door switch and LH and RH 
rear door switches is from the BCU pin C0660-4 to header C0291 LHD/C0285 RHD on a 
PLG wire.
From the header C0291 LHD/C0285 RHD a PLG wire is connected to connector interface 
C0464-1/C0733-1. From the connector interface the earth continues on a PW wire to the LH 
or RH (passenger) door switch. The earth is connected from the switch on a B wire to earth 
header...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.133
INTERIOR ILLUMINATION
DESCRIPTION
General
The interior illumination provides background lighting for the instrument pack and control 
switch graphics. The interior illumination operates with the side lamps or headlamps, 
independent of the ignition switch position.
The radio, air temperature control (if fitted) and digital clock displays are illuminated 
permanently. When the side lamps are switched on the displays are dimmed.
The LH and RH rear window...

DESCRIPTION AND OPERATION
4.134DISCOVERY SERIES II
From header C0286, RB wires pass through headers C0295 and C0724 and supply power 
to the remaining interior illumination bulbs.
All of the bulbs are earthed by B wires, with the exception of the rear window LH and RH 
switches. These switches are connected to the window lift isolation switch on SG wires 
which is then connected to earth on a B wire.
NAS/Japan vehicles only
The instrument illumination dimmer rheostat receives a supply on an RO wire from...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.135
INSTRUMENTS
DESCRIPTION
General
Indications of vehicle and system status are relayed to the driver by the instruments and 
warning lamps contained within the instrument pack. The warning lamps fitted in the 
instrument pack are dependant on model/market variants and the engine/gearbox fitted.
NOTE: Some of the warning lamps are LED indicators that are powered at low voltages from 
the instrument pack internal circuits.
OPERATION
Instruments Supply...

DESCRIPTION AND OPERATION
4.136DISCOVERY SERIES II
Instruments Operation
Handbrake and low brake fluid level warning lamp
The handbrake and low brake fluid level warning lamps are connected to the instrument 
pack from pin C0230-10 on a KO wire to Header C0293 LHD/C0285 RHD. From header 
CO293 LHD/C0285 RHD a KO wire is connected to the handbrake switch, the handbrake 
switch is locally earthed.
A second connection from header C0293 LHD/C0285 RHD is connected to the brake fluid 
level switch on a KO...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.137
SRS warning lamp
The SRS warning lamp is connected from pin C0233-7 to pin C0256-13 on the SRS DCU 
on a YR wire.
Refer to Supplementary Restraint System (SRS) section of this manual for a description and 
operation of the SRS warning lamp circuit.
Fuel filter water warning lamp (Td5 models only)
A water sensor is installed in the fuel system, the power supply for the sensor is from fuse 
10 in the engine compartment fusebox and the closed contacts of...

DESCRIPTION AND OPERATION
4.138DISCOVERY SERIES II
Off road warning lamp
The off road warning lamp is connected from pin C0230-9 on the instrument pack to the off 
road mode switch.
Refer to the Self Levelling and Anti-Lock Braking System (SLABS) section in this manual for 
a description of the operation of the off road warning lamp.
SLS warning lamp
The SLS warning lamp is connected from pin C0233-2 on the instrument pack to the SLABS 
ECU pin C0655-8 on a WO wire.
Refer to the Self Levelling and...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.139
Direction indicator warning lamps
The direction indicator left and right warning lamps are connected from the instrument pack 
pin C0233-16 via header C0293 LHD/ C0292 RHD to pin C0661-1 on the BCU. This 
connection is part of the serial data bus between the instrument pack and the BCU.
The BCU and the Intelligent Driver Module (IDM) control the operation of the direction 
indicators warning lamps.
Refer to the direction indicators and hazard warning...