... Jumper on S1 &S2→ Unlocking4. WiringOn the back of receiver board marks: K, G, and BK is normal open ... is off position) press A on the transmitter, receiver A goes on 2 seconds, then goes off automatically ... , same of B/C/D.2) Non lock modelPress remote button A, the receiver relay is on, ... D.3) Interlock modelPress remote button A, the receiver relay A is on, the relay B/C/D ...