do not replace anything yet ! first check the electrical system . disconnect the negative cable , + o: s7 ~% i3 mconnect 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 , 5 C- k0 I# k% c q5 unow you know in which that device is draining the battery .