do not replace anything yet ! first check the electrical system . disconnect the negative cable , " B, y4 W% h, Qconnect 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 , 3 u% g. M2 W* U0 n* p" t" t1 lnow you know in which that device is draining the battery .