My wife has a 1995 Pathfinder. The right headlight will not work on lowbeam. The bulb is fine. I've swapped it out and both the new and old bulbs are fine. The high beam works ok. The Driver side light functions well too.
It might be the turn signal switch. I had a similar problem a few years ago and had to swap out the switch. Now one headlight turns on spontaneously when the car is off. To fix it, I need to flip the turn signal on. Try messing with the turn signal switch when the lights are on.