Land Rover Defender 1999 Td5 Electrical Library Rover Manual

DESCRIPTION AND OPERATION
DEFENDER 1999 MY4.17
AIR CONDITIONING - Td5
DESCRIPTION
The air conditioning (aircon) system fitted to Defender 1999 MY operates
independently of the standard heating and ventilation system. Controlled by 2
switches, the aircon system will only operate when the engine is running and
the blower control switch is in at least position I.
Both the blower control and temperature control are 3 position switches. The
cooled and dehumidified air produced by the aircon system is directed...

DESCRIPTION AND OPERATION
4.18
DEFENDER 1999 MY
Fuse 3 of the passenger compartment fuse box (C0580-6) provides a feed to
the blower relay (C0153-3) and the air conditioning unit (C1273-11) on
white/green wires. The blower relay (C0153-2) is earthed on a blue/black wire
and is energised whenever the ignition switch is in position II. This allows a
feed from fuse 9 of the passenger compartment fuse box (C0580-18) to flow
across the relay (C0153-1 & C0153-4) to the blower motor (C0023-1) on a
blue/white...

DESCRIPTION AND OPERATION
DEFENDER 1999 MY4.19
The second input to the ECM (C0658-23) is the fan request from the air
conditioning unit (C1273-1) on a white/black then purple/black wire. This
causes the ECM (C0658-4) to earth the cooling fan relay (C0019-86) on a
black/purple wire. Current can now flow from fuse 10 of the passenger
compartment fuse box, across the energised cooling fan relay (C0019-30 &
C0019-87) and supply a feed to the condenser fan (C0280-1) on a black/brown
wire. The fan is earthed...

DESCRIPTION AND OPERATION
4.20
DEFENDER 1999 MY
HEATER
DESCRIPTION
The heater is operated by three sliding controls attached to the instrument
binnacle. Two of the controls mechanically regulate the temperature and air
flow distribution. The third control is a switch that operates the two speed
heater blower. The heater blower operates with the ignition switch in position I
or II, and is completely independent of the air conditioning system.
OPERATION
Feed from the battery positive terminal is connected...

DESCRIPTION AND OPERATION
DEFENDER 1999 MY4.21
HEATED REAR WINDOW (HRW)
DESCRIPTION
The heated rear window (HRW) is operated by a latching switch mounted on
the dash panel. When the switch is set to the On position, the instrument
panel warning lamp will illuminate to indicate the HRW is operating. The HRW
only operates when the ignition switch is turned to position II.
OPERATION
Feed from the battery positive terminal is connected to fusible link 1 and fusible
link 5 of the engine compartment fuse box...

DESCRIPTION AND OPERATION
4.22
DEFENDER 1999 MY
WIPERS AND WASHERS
DESCRIPTION
The front windscreen wipers are controlled from the column switch and operate
when the ignition switch is in position II. The wipers have 2 speed settings,
along with a flick wipe and single wipe facility. An intermittent wipe function and
programmed wash wipe facility is controlled by the windscreen wiper delay
ECU.
Moving the wiper switch down from the off position initiates the intermittent
wipe function. Moving the wiper...

DESCRIPTION AND OPERATION
DEFENDER 1999 MY4.23
OPERATION
Feed from the positive battery terminal is connected to fusible link 5 of the
engine compartment fuse box (C0632-1) by a brown wire. Current passes
across fusible link 5 (C0570-2) which is connected to the ignition switch
(C0028-1) by a brown/white wire.
With the ignition switch in position II, current flows across the switch
(C0094-1) to fuses 2 and 3 of the passenger compartment fuse box (C0580-1)
on a white wire. Fuse 3 (C0580-6) supplies power...

DESCRIPTION AND OPERATION
4.24
DEFENDER 1999 MY
Park Circuit
Positioning the wash/wipe switch back to the Off position cuts power to the
wiper motor on the blue/light green or red/light green wire (depending on the
operational speed of the wiper motor). The park circuit operates to return the
wipers to their park position. The park switch (C0030-4) is integral to the wiper
motor, and receives a feed on a white/green wire from fuse 2 of the passenger
compartment fuse box (C0580-4). The park switch is...

DESCRIPTION AND OPERATION
DEFENDER 1999 MY4.25
When the windscreen wiper delay ECU (C0303-6) receives a feed from the
wash/wipe switch (C0278-2), it supplies a feed (C0303-2) back to the
wash/wipe switch (C0278-4) on a yellow/light green wire. Power flows across
the wash/wipe switch (C0278-1) and onto the wiper motor (C0030-3), which
operates at slow speed. When the washer switch is released, the ECU will
operate the wipers for a further 3 cycles. Once this has been completed, the
feed to the wash/wipe...

DESCRIPTION AND OPERATION
4.26
DEFENDER 1999 MY
EXTERIOR LAMPS - Brake and Reverse Lamps
DESCRIPTION
The brake lamps illuminate when the ignition switch is in position II and the
brake pedal is depressed. The reverse lamps illuminate when the ignition
switch is in position II and the gear selector lever is in the reverse position.
OPERATION
Feed from the battery positive terminal is connected to fusible link 5 of the
engine compartment fuse box (C0632-1) by a brown wire. Current passes
through fusible...