Left/Right-Turn-Signal Input

The BCM determines that the turn signal switch is ON by sensing a transition from open to B+ in one of the following circuits:
^ CKT 18 (left turn signal)
^ CKT 19 (right turn signal)

The BCM determines that the turn signal switch is oft by sensing a constant open or B+ in one of the following circuits:
^ CKT 18
^ CKT 19

The BCM uses this input for the operation of the turn signal reminder.