do not replace anything yet ! first check the electrical system . disconnect the negative cable ,7 K& l3 v. Q) l- \
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 , $ v% K; p% J5 s0 |9 {now you know in which that device is draining the battery .