I would suspect the battery drain is coming from your alternator. It is common for a slight drain from the alternator to occur. That is why when modern alternator charging systems were introduced the accessory type ignition switch also came into being. The accessory post (now a fourth terminal on the ignition switch) was isolated from the rest of the terminals on the switch and that stopped the feedback current at that terminal. You can do the same thing with a DA Plug and you will not have to change out your ignition switch. Thanks Randy
