do not replace anything yet ! first check the electrical system . disconnect the negative cable , T7 B5 z2 X6 R2 r; jconnect 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 , / O- {: o- O1 x8 o3 y$ Ynow you know in which that device is draining the battery .