Lamp Out Indicator: Description and Operation

The lamp monitor system is made up of two main components: the Driver Information Center (DIC) and the adaptive lamp monitor module. The adaptive lamp monitor module monitors each lighting circuit by looking at voltage across internal resistors in each monitored lighting circuit. If the voltage drop across one of these resistors decreases by a certain percentage, the adaptive lamp monitor module recognizes this as a lamp outage and communicates this information over the serial data line to the Driver DIC. The DIC then displays an outage and sounds a slow chime for 5 seconds.

The adaptive lamp monitor module is adaptive because it may be used in vehicles with various lighting configurations. This module recognizes and adapts to a particular lighting configuration when the ignition switch is in "RUN" and the park lamps are turned "ON". This module must relearn the vehicle lighting configuration if the battery is disconnected.