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INSTRUMENTS DESCRIPTION AND OPERATION 88-21 Hill Descent Control (HDC) information warning lamp The HDC information warning lamp within the instrument pack utilises a green LED and a clear legend. On vehicles When the ignition is switched on, the SLABS ECU illuminates the LED to provide a self-check, providing there is no The power input for the LED is supplied by the instrument pack via fuse 27. The SLABS ECU provides the earth path The voltage on the SLABS ECU earth path to the instrument pack is as follows: l < 1.8 volts = warning lamp on. l > 7.7 volts = warning lamp off. |