Okay, feeling like a true doofus now. I have reassembled the ignition switch and made sure all connectors are secure. Key turns over like a dream, everything comes on except the car won't start. It won't even engage the starter. It feels like some sensor is preventing the circuit from closing.

Can it be I'm a victim of the one-two punch -- sticky ignition followed immediately by RCM module failure? I hope not.

Any help is greatly appreciated.

Thanks.