do not replace anything yet ! first check the electrical system . disconnect the negative cable ,# m! I+ g; Z# s: H: \
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 ,9 h! w$ S7 X* |, s7 l
now you know in which that device is draining the battery .