do not replace anything yet ! first check the electrical system . disconnect the negative cable , 9 X* `+ H6 h: f% m6 v8 sconnect 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 , * z. S+ P- f& V# U* B. B) {now you know in which that device is draining the battery .