I finally was able to remove the passenger headlight, and replaced the bulb, BUT now with the replacement bulb, it still not working. All of the headlights work. What could now be the problem?

 

Could be a wiring issue or a fcm issue. The head lights get a signal from the switch that goes to the fcm to switch the lights on. and its one signal for one side and one signal for the other. Have you checked for any codes?