... circuit (locked vehicles); B, lifted 4 and circuit lock (unlock); C, a mandatory four-wheel lock. (For wireless control). D, an independent ... vehicle (off oil power), but the control buttons and the A, B linkage. 2, can identify the alarm state of working ... (four sets of numbers). Work Status: A, four-wheel lock; B, four-wheel lock lifted. C, time information. D, illegal intrusion state ...