Discovery II (LT) V8-4.6L (2003)
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Courtesy Lamp: Description and Operation
Interior Lamps Description
Interior Lamps Description
Interior illumination is provided by front, rear and load space lamps, ignition switch illumination, vanity mirror illumination and also includes an
electrically operated interior rear view mirror (if fitted).
The front, rear and load space lamps and the ignition illumination operate from a direct feed from the battery, independent of the ignition switch position.
The vanity mirrors and the interior rear view mirror operate with the ignition switch in position I or II.
The Body Control Unit (BCU) is programmed to operate the interior lamps and the ignition illumination by a predetermined period after a door has been
opened or an unlock request is made with the handset.
Power is supplied to the interior rear view mirror when reverse gear is selected. This changes the mirror from its dipped to normal state for clarity of
vision.
On Korean vehicles only, an additional link harness is used to provide a power supply from the rear interior lamp to the front interior lamp and infra-red
sensor.
Interior Lamps Supply
Circuit supply
A feed from the battery positive terminal is connected on an R wire to the
engine compartment fusebox where it passes through fusible links 1, 3, 7 and 8. Fusible links 1 and 7 are connected in series.
A feed through fusible links 1 and 7 is connected to the contacts of the auxiliary circuits relay.
A feed from fusible link 3 is connected from the engine compartment fusebox to the passenger compartment fusebox on an NP wire. The feed passes
through fuse 20 in the passenger compartment fusebox and is connected on a P wire to header C0289 LHD/C0294 RHD.
A feed from fusible link 8 in the engine compartment fusebox is connected on an NW wire to the passenger compartment fusebox and from the fusebox
to the ignition switch on an N wire.
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 energizes the coil and closes the relay contacts. The coil is earthed on a B wire from the engine compartment fusebox
to earth header C0018, via header C0286 LHD/C0288 RHD.
With the ignition switch in position II, a feed is connected from the ignition switch to the passenger compartment fusebox on a Y wire. The feed passes
through fuse 25 in the passenger compartment fusebox and is connected on a GY wire to the reverse lamp switch on vehicles with manual transmission
or the automatic transmission starter inhibitor/reverse lamp switch on vehicles with automatic transmission.
