do not replace anything yet ! first check the electrical system . disconnect the negative cable ,; w! M9 d: M* g; h; _8 d
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 ,' i& e: Y4 |! k+ x3 F, |0 _7 g
now you know in which that device is draining the battery .