TC reported APS fault at car 1507. Unable to reset. Staff(YCK) checked and confirmed no converter fa ult at car 1507. TC reported APS fault at car 1507. Unable t o reset. Staff(YCK) checked and confirmed no converter fault ~~~~~ TC reported APS fault at car 1507. Unable to duplicated intermittently at depot.A/C unit running ok.Suspect false alarm due to losseness in connection leading to Tims unit.Apply pressure and shook CN-11 while measuring Pin 25 CNM3 (Tims control unit)Wire T181 to the APS Panel delay board.DCR-wire T181 and found no fluctuation in resistance.Subsequently,we shook the junction box wire T181 at terminal at terminal 130 and found fluctuating resistance.To rectify we changed the WAGO connection port and secured wire T181 in the new port.Function test and shook wire T181 no fluctuation observed.Train released for further monitoring. Done by Ashwin. 02/11/22