do not replace anything yet ! first check the electrical system . disconnect the negative cable , & n* ? V9 ~3 s/ Bconnect 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 , ( m' ]; k% I7 ]3 I4 Q4 B5 \1 ynow you know in which that device is draining the battery .