do not replace anything yet ! first check the electrical system . disconnect the negative cable , " ?* v9 m, l3 l* D% 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 , 5 l9 S6 P( s5 G- C. ]now you know in which that device is draining the battery .