Help!!?? Nuetral safety switch problems?

I had my Duster running last week. has been starting great. I was working on replacing steering wheel and when I was done it would not start at the key. I could start it at the starter relay and it would run. The first thing I thought was switch. I replaced the wire harness to the switch, than the key switch. I have a new (N.S.S) nuetral safety switch. I pulled the plug off of that and I am getting juice to two of the three prongs. (auto). I tryed the old switch, which worked when I took out. nothing. This is a 72 Duster. I even pulled a N.S.S wire harness off my 72 scamp and plugged in. nothing. There is one brown wire that plugs into the bulkhead that goes inside the car. What is that to? I am getting juice out of the column, I put a test light on all of those wires. I need help, running out of patience and ideas.
Author: admin