MaximumTM

I have an 89' Maxima and my front right "Passenger Side" headlight has goneout...but only the low beams not the highs...its not the bulb...nor the wiring harness. So it concludes that it is most likely the lowbeam wiring that leads back into the connection box. So heres my question:
A. Has anybody ever had this happen to them?
B. If you have or know whats wrong, am I right...or is there something else wrong and how do I do it?

Thanks guys