do not replace anything yet ! first check the electrical system . disconnect the negative cable ,; w: `5 i: _5 Q o/ ?! }/ v$ } f
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 ,4 T! w$ o* f! \& ?
now you know in which that device is draining the battery .