do not replace anything yet ! first check the electrical system . disconnect the negative cable , ~4 y5 S( l- t
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 ,% I+ @' E. @" N5 t1 x* D
now you know in which that device is draining the battery .