have a 91 3000gt sl ,battery is draining altenator is charging at wire on back, but at battery is not charging. i ran a separate cable from alt to battery and now i got charge. i have done all the charge circut tracing and all is good but something is robbing the charge return to the battery.a while back my power door locks quit working then i think the draw started to occur. now ive pulled the fuses for the security which is also door locks so they should not have any draw at all but when connecting and removing negative cable from battery the rt side door lock engages and you cannot manually pull the door lock lever back untill power is removed. i think this is the short but where do i look for problem?