do not replace anything yet ! first check the electrical system . disconnect the negative cable , $ q; p# T' x: `. w" } k) Pconnect 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 ,$ L I! \3 T$ ]
now you know in which that device is draining the battery .