Glow plug warning lamp
The glow plug warning lamp within the instrument pack utilizes an amber LED and a clear legend. On vehicles with diesel engines the LED illuminates when the ECM operates the glow plugs. After a predetermined time calculated by the ECM, dependent on engine temperature, the LED is switched off providing the driver with a visible warning that the engine can be started.
The power input for the LED is supplied by the instrument pack via fuse 27. The ECM provides the earth path to illuminate the warning lamp.
The voltage on the earth path from the ECM to the instrument pack is as follows:
- < 1.8 volts = warning lamp on.
- > 7.7 volts = warning lamp off.