Well, took my Z to the shop couple days ago to have various gremlins looked at. Among them is my stupid dim headlight.
Do you know what... it's not a grounding issue at all. It's the stupid headlight sensor! Apparently one of the pins on the module isn't supplying enough power. Meaning it needs to be replaced.
I"ve checked all the parts places and junkyards around here and nothing. Even Courtesy Nissan doesn't have one. So if any of you 280ZX guys out there has or knows where I can get a new/not-broken Headlamp Sensor, please do let me know. I really need BOTH headlights now that it gets dark so early.