High Beam Headlamps (T4F)

When the low beam headlamps are ON and the turn signal/multifunction switch is placed in the high beam position, ground is applied to the BCM through the high beam signal circuit. The BCM responds to the high beam request by applying battery positive voltage through the high beam control circuit to the left and right high beam solenoid actuators opening the left and right high beam shutters exposing the remaining portion of the headlamp that was covered by the shutters illuminating the high beams at full intensity.