Following along with this thread and others with similar symptoms, I have the same problem. My LS was running great until three days ago when it would not start. As indicated by many of the great minds here and a very savy friend, I had the battery replaced with a brand new one, the cables cleaned, etc. and no joy. Is there a diagram that anyone can refer me to so I can follow along with the other trouble shooting proceedures, I.e., ignition switch, gear shift, P1, etc.?
If this helps, I can push start it with no problem and once it is on, it runs great, all the lights work fine when the key is turned on, there is a clicking sound when the key goes all the way over but now start...
Please help... This car is way to amazing to let her sit in the garage....
Thanks in advance, GalfnAlfa

If this helps, I can push start it with no problem and once it is on, it runs great, all the lights work fine when the key is turned on, there is a clicking sound when the key goes all the way over but now start...
Please help... This car is way to amazing to let her sit in the garage....
Thanks in advance, GalfnAlfa