do not replace anything yet ! first check the electrical system . disconnect the negative cable , z! Q8 W# D7 k% q6 e4 a: m3 C3 ?! I
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 ,2 S4 l% ^# s. w6 H- {: u$ J
now you know in which that device is draining the battery .