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

DESCRIPTION AND OPERATION
4.10DISCOVERY SERIES II
CDL motor operation
The electronic relays in the passenger compartment fusebox supply power feeds or earth 
paths for each door lock motor as necessary. Each door lock motor is connected to the 
passenger compartment fusebox as follows:
Front LH/RH (drivers) door lock motor: 
zA KR wire is connected from the fusebox to the LH/RH front CDL motor.
zA KP wire is connected from the fusebox, via header C0292 LHD/C0291 RHD, to the 
LH/RH front superlock motor...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.11
WINDOWS - FRONT
DESCRIPTION
Windows - Front Description
The front windows are electrically operated from two rocker switches located in the centre 
console. The front windows are controlled by the Body Control Unit (BCU) which limits the 
operation of the windows to when the ignition is in position II and for a period of 44 seconds 
after the ignition is switched off or after the driver’s door is opened. The front window 
operation is suspended when the...

DESCRIPTION AND OPERATION
4.12DISCOVERY SERIES II
Ignition switch supply
With the ignition switch in position II, the feed from fusible link 8 passes through the ignition 
switch to fuse 29 in the passenger compartment fusebox on a Y wire. From fuse 29 the feed 
is connected to pin C0660-1 of the BCU on a GU wire.
Windows - Front Operation
BCU earth connection
The BCU is earthed from pin C0660-11 on a B wire to earth header C0551.
Front left window up
The left window switch up contact is connected to pin...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.13
Front right window up
The right window switch up contact is connected to pin C0660-19 on the BCU by a BU wire. 
When the switch is set to the up position an internal supply from the BCU flows along the 
BU wire through the contacts of the switch and to earth via earth header C0552 on a B wire.
The BCU internal logic monitors the current flow from pin C0660-19 and uses this input as 
an up signal. The BCU routes power from the permanent feed from pin...

DESCRIPTION AND OPERATION
4.14DISCOVERY SERIES II
WINDOWS - REAR
DESCRIPTION
Windows - Rear
The rear windows are electrically operated from two rockers switches located in the centre 
console. A rocker switch located in each rear door trim panel also operates the 
corresponding rear window.
A window lift isolation switch is located in the centre console. The isolation switch prevents 
rear window operation using the rear window switches in the rear door trims, but allows 
operation from the rear window...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.15
Ignition switch supply
With the ignition switch in position II, the feed from fusible link 8 passes through the ignition 
switch to fuse 29 in the passenger compartment fusebox on a Y wire.
When the ignition switch is in position II, the feed from fuse 29 is connected to the IDM. The 
IDM logic connects the feed from fuse 13 in the passenger compartment fusebox through 
the coil of the rear window lift relay, to earth header C0551 on a B wire. This...

DESCRIPTION AND OPERATION
4.16DISCOVERY SERIES II
RH rear window console switch - down
Operation of the RH window console switch in the down position, allows the feed from the 
rear window lift relay to pass through the up switch contacts to the RH rear window switch 
on an SY wire. The feed passes through the up switch contacts and is connected to the RH 
rear window motor on an SO wire.
When the RH window console switch is set in the down position, the contacts complete the 
earth path for the RH rear...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.17
LH rear window switch - up
Operation of the LH rear window switch in the up position, allows the feed from the rear 
window lift relay to pass through the down contacts of the LH window console switch to the 
rear window switch on an SY wire. The feed passes through the down switch contacts to the 
LH rear window motor on an SR wire.
When the LH rear window switch is set in the up position, the contacts complete the earth 
path for the LH rear window...

DESCRIPTION AND OPERATION
4.18DISCOVERY SERIES II
Window lift isolation switch
If the window lift isolation switch is latched out, the earth path from the LH and RH rear 
window switches is broken, preventing operation of the LH and RH rear window switches. 
Rear window operation using the console switches is not affected by the isolation switch.
When the window lift isolation switch is latched out, the removal of the earth path also breaks 
the earth path for the LH and RH rear window switch...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.19
SUNROOF
DESCRIPTION
Sunroof Description
Electric sunroofs are fitted at the front and rear of the vehicle. Both sunroofs are electrically 
operated. Switches on the front overhead console control operation of the front and rear 
sunroofs.
The rear sunroof can be operated by a switch located in the rear overhead console. The 
switch is only operative when not disabled by the rear sunroof isolation switch located in the 
front overhead console.
OPERATION...