Dome light fix Options

[black92_tsi_awd]

Ok, this broken dome light is driving me crazy.

The dome light does not turn on when you open the doors, floor and iginition lights both turn on though. Map lights do not work.

I pulled the dome light and there's no voltage at the plug in the headliner with the doors open. I imagine one should have power all the time for the map lights, the other should be powered when the door is opened. The dome light did work when hooked directly to a 12v battery. All fuses are good.

What else should I look at? Is there a relay I'm missing?
Where does the dome wire go? I took down the a pillar trim and couldn't find any wiring. I'll run new wiring if I knew where it went, I rather not take down the headliner if I don't have too!