Hmmm. Try the hot tombstones (blue wire) to ground. You should get 120V. If you do, turn the switch off and measure continuity between the neutral tombstones and ground you should get a few ohms. All this depends on your supply wiring being proper.Alright, sorry it took me so long. After messing with the ole' Multimeter, I checked the main hot and neutral to the fixture (not the tombstones) and it read about 120v AC (its analogue, so numbers are approx.)
then I check the tombstone contacts, zero. Then maybe the wires coming from them? one lead on half the fixture and another on the other half? I tried many different combinations here, all read zero. Now this could either be because of comically terrible wire nutting, OR the main power isn't getting to the tombstones. Let's assume it's the ladder; what would one do about this?
Let us know what you measure.