Stop in for a cup of coffee
The wagon has a few things going on.
It may have a slow drain, in which case its almost certainly the ignition switch.
It also seems to have resistance when the heater and any other item is on, like lights. But its not consistant.
Not many access locations (connectors). A/C runs under the entire dash, so that's in the way there. Just got to take the time to take it apart. Even to get to the headlights the whole grill has to come off. OMR knows thats not a big deal either. Although in the cemetery space to put stuff was not issue! LOL