do not replace anything yet ! first check the electrical system . disconnect the negative cable ,+ ^* `9 {5 z( b' B& R) n; s) z
connect 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 ,# Z. v) h. B8 w5 S% r' t
now you know in which that device is draining the battery .