do not replace anything yet ! first check the electrical system . disconnect the negative cable , 7 A+ v! p: q4 I% T5 qconnect 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 ,# m! O% F4 ]$ E$ O
now you know in which that device is draining the battery .