High Beam Indicator

The high beam indicator (blue) display is a distributed function between the BCM and the instrument cluster. The BCM performs the following functions:
^ Reads the high beam bulb voltage.
^ Divides by the total system voltage in order to determine a percent value.

This value is compared against a calibration in order to determine if the high beams are ON. The BCM transmits the status of the high beams to the instrument cluster via the SPI serial data bus. The instrument cluster then commands the high beam indicator accordingly.