Just follow the "road map." It might be right in the ignition switch contacts / ignition switch connector. Don't get distracted by such as the alternator unless there is some other problem. Concentrate on the two end "subjects" and what is in between..........that is, the battery, and the VR. Follow that specific path. Is it the blue "igntiion run" terminals in the bulkhead? Is it the igntiion switch connector? Is it the switch itself? You can access the switch, so you can check it fairly easily.