do not replace anything yet ! first check the electrical system . disconnect the negative cable , 6 c3 r. N. f; X+ a8 ^( Xconnect 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 , ( t- e& Z. \9 j+ _2 c6 Lnow you know in which that device is draining the battery .