This means nothing. All you've done is removed the gage that tells whether current is flowing out of the battery.
This may get you closer. The connector outers should go to the headlights first and then to ground. It should show ground with the resistance of at least one filament.
Yes High beam and low beam.
Not sure which plug you are looking at. If you're looking at the hi/low, according the the My-mopar diagram, red is high beam. Its probably right, but you can check the shop manual or just look at the stuf you have pulled and see if it makes sense.
OK.