do not replace anything yet ! first check the electrical system . disconnect the negative cable ," W+ y# Y+ t4 K! r$ y$ m
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 , $ r" X1 n7 p% Snow you know in which that device is draining the battery .