do not replace anything yet ! first check the electrical system . disconnect the negative cable ,$ I' _% E' Y: q: ?2 Y
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 ,! N* d! G$ A0 `+ I5 _
now you know in which that device is draining the battery .