Discovery II (LT) V8-4.6L (2003)
/v8-4.6l/Page-1751001.png)
Audible Warning Device: Description and Operation
Description
Lights On Alarm Description
The lights on alarm in the instrument pack operates when the driver's door is open and the side lamps are on. The system uses inputs from:
-
The drivers door switch
-
The lighting switch
A serial data bus allows communication between the the Body Control Unit (BCU) the Intelligent Driver's Module (IDM) and the instrument pack.
Lights On Alarm Supply
Circuit supply
A feed from the battery positive terminal is connected on an R wire to the engine compartment fusebox where it is connected to fusible links 8 and 12
and fuse 13.
A feed from fusible link 12 is connected on an NG wire to the lighting switch.
A feed from fuse 13 is connected on a PN wire to pin C0660-13 on the BCU. A BCU system earth is provided by a B wire connected to earth header
C0551.
A feed from fusible link 8 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 II, the feed from fusible link 8 flows through the ignition switch to the passenger compartment fuse box on a Y wire.
The feed continues through fuse 29 in the passenger compartment fusebox and is connected to pin C0660-1 on the BCU by a GU wire.
