Train door not proven closed. TC recyclethrice, fault persist. Operated ADBS, DIR still lit up. tra in disembark at JUR MT. Operate DIRBS to proceed in ATPM to BSD ~~~~~ Found #3704-B/S cab door sensing s/w lock nut loose and mis-align. Re-adjust back sensing s/w to the original position. DIR indication extinguished - fault cleared. ADBS sealed back. Done by Sanip. 18/07/20.