Discovery II (LT) V8-4.0L (2002)
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Trailer Warning Indicator: Description and Operation
Trailer Warning Lamp
The trailer warning lamp within the instrument pack utilises a green LED and a clear legend. When a trailer is fitted to the vehicle, and the direction
indicators are operated, the BCU detects additional current draw and illuminates the LED, providing the driver with a visible warning.
When the ignition is switched on the BCU illuminates the LED to provide a self-check, providing there is no fault it will remain illuminated for 3
seconds or until the ignition is switched off. This self-check is every time the ignition is switched on, not only if a trailer is connected.
The power input for the LED is supplied by the instrument pack via fuse 27. The BCU provides the earth path to illuminate the warning lamp.
