When I had my problem I also had power at the headlights and but not at the switch... if that makes sense to you. Meaning that my daytime running lights and high beams worked, but no low beams. My problem was a broken wire at the connector plate in the steering column. When you tore apart your steering column did you locate the connector plate for the wires? If not, check there. If so, did you wiggle each wire and check connectivity? That is where I would start. I hope this helps.
Good luck solving your problem.
Brad
