I had the same problem, I put heavy vibration on the lock housing near the steering column and key turned, once it turned, I kept it turned, and disassembled and removed the entire lock housing, they show you videos of this, the reason the lock jams is a small pin with a tiny spring gets stuck and won't let mechanism turn, the pin is located under a 3/4 inch square plate that can be pried off once you remove the lock housing, pin and spring are not needed, I used a air chisel with blunt tip and turned key at same time, if you do not have access to air chisel, then use an electric vibrating blade wood cutting tool, or have someone tap on lock housing with a hammer not too hard as to damage the housing about two inches from steering column as you try to turn the key, Steve