do not replace anything yet ! first check the electrical system . disconnect the negative cable ,) m3 {1 q+ J K/ f( X8 @
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 , 7 b+ f$ ~) \4 D2 d; u9 @now you know in which that device is draining the battery .