do not replace anything yet ! first check the electrical system . disconnect the negative cable , + B+ y* @0 h- H4 W+ e0 dconnect 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 , 0 b; T" U+ I5 L& W8 i; f$ z0 ?now you know in which that device is draining the battery .