Converted 74 Duster to auomatic on the floor, and now won't start. HELP!!?

I recently changed my 1974 Duster over from automatic on the column to automatic on the floor. I already changed the shifter and steering column over, and when I go to start the car, it didn't turn over. The dome light comes on, but none of the dash lights come on. The only difference in the wiring harness from the old steering column and new one is there is a single yellow wire separate from the 2 plugs. Can someone, anyone help?