do not replace anything yet ! first check the electrical system . disconnect the negative cable ,# b# q) \: I% D2 }0 l
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 ,2 t- m6 p+ V) d5 n" P( c s, U: ^
now you know in which that device is draining the battery .