Headlight Switch Cranks Engine??

I understand when the door opens it triggers the dome light to come on due to the switch making ground contact.
Do you now understand how power can be at lamp, and it doesn't light up?
Like you observed here
These issues began when I was investigating why my brake lights were not working, they all illuminated, but wouldn't signal me using my brake.

Then all of a sudden my rear taillight stopped working but they were receiving power, bulbs aren't burnt.

That is when I realized when I turned on my headlights my passenger fender mounted turn signal was on and my driver side grille turn signal, was on with constant power but not the other turn signals. Turn signals should only get power when using the turn signal lever on the column.
it might be switched on th eground side or it could be a bad ground wire connection causing the open circuit.