do not replace anything yet ! first check the electrical system . disconnect the negative cable ,9 |, I- h" J0 n# [6 P0 V+ o7 m
connect a test light between cable and battery post . if the test light lights up bright , there could be a short circuit somewhere . pull out each fuse to see until the test light goes dim , % z3 v7 ~( u/ [8 Enow you know in which that device is draining the battery .