Two questions; (my opinion only)
1. Does the key turn and start the motor, but not unlock the column? IF yes, the pin behind the key assembly is jammed or the spring is broken. You will have to pull the ignition switch out again to find out which. Not an easy job.
2. If the key turns hard or doesn't turn at all, you have a key/tumbler problem. Again, the key assembly has to come out.
In this case a key lube might help, but not likely.
The "Mitchell" repair manual has a very good section on this proceedure. I had my own repair shop for 14 years and they were the only manuals I would buy especialy for electrical problems. They aren't cheap, but you get what you pay for. Hope this gives you a direction being the switch changed. Jim at; jamesweizel@yahoo. Com
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Sunday, September 28th, 2008 AT 1:25 PM