Discovery II (LT) V8-4.6L (2003)
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Brake Warning Indicator: Description and Operation
Brake System Warning Lamp
The brake system warning lamp within the instrument pack utilises a red LED and a clear legend. If the brake fluid level is low, the hand brake is
operated or there is a brake system fault, the LED will be illuminated providing the driver with a visible warning.
When the ignition is switched on, the instrument pack 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.
There are two configurations of the legend for the warning lamp:
^
NAS only.
^
All other markets.
The power input for the LED is supplied by the instrument pack via fuse 27. The hand brake switch, the low brake fluid level switch or the SLABS ECU
provides the earth path illuminating the warning lamp.
The hand brake switch has a separate connection to the vehicle body. The low brake fluid switch connects to an earth header joint.
On the earth paths to the instrument pack the warning lamp is controlled according to these voltages:
^
< 1.8 volts = warning lamp on.
^
> 7.7 volts = warning lamp off.
