do not replace anything yet ! first check the electrical system . disconnect the negative cable ,- p7 S* d2 t, m. g. V
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 ,: o0 G4 R" S2 l
now you know in which that device is draining the battery .