Counter bound T218 informed that headlight on LHS of T231 was not working. TC of T231 stepped out atSBW NB and confirmed that LHS headlight was not working. ~~~~~ 3622: Counter bound T218 informed that headlight on LHS of T231 was not working. TC of T231(3622) stepped out at SBW NB and confirmed that LHS headlight was not working.  3622 B/S headlight replaced with new spare. security/function check - OK.  Kiran/Anand 44379