Low Beam Input

Range: 0 - 16 Volts
The BCM uses this input in order to determine the state of the low beam headlamps. A single wire input into the BCM monitors the low beam lamp voltage. On a known good vehicle, with the low beams off, the scan tool displayed value should be battery system voltage.

On a known good vehicle, with the DRL on, the scan tool display value should be 25 percent to 83 percent of battery system voltage.

On a known good vehicle, with the low beams on, the scan tool display value should be 0 percent (0 Volts) to 16 percent of the battery system voltage. On a known good vehicle, with the high beams on (low beams off), the scan tool display value should be the battery system voltage.