do not replace anything yet ! first check the electrical system . disconnect the negative cable , - _% e" Z0 O5 {. d5 oconnect 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" o! C; O: F& a+ t$ Q3 {now you know in which that device is draining the battery .