do not replace anything yet ! first check the electrical system . disconnect the negative cable ,5 M( d3 M2 I s% [1 Q+ g& W. r& F/ K
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 , ( Z+ e D5 f% p( M9 @* Pnow you know in which that device is draining the battery .