The passenger side headlight lights when the car is unlocked, but extinguishes when the car is started. I unplugged the wiring harness from from the headlight assembly and confirmed 12 vdc on the pins when the car is unlocked & 0 vdc when the car is started. There is no corrosion on the connectors to speak of. So, I am kind of at a loss as to where to go from here. I assume the Body Control Module controls when there is 12 v on the line & when it isn't, but that is just a guess. Any insight would be greatly appreciated.