Anti-Theft System plus oddities?

Pin 12 on the CCRM is supposed to have power when the key is on but it does not. Pin 12 does come from the PCM, so I took off the PCM to test the wire that runs to pin 12. This wire showed connectivity and less than one ohm of resistance. So, pin 12 should be getting power from the PCM, but it is not. I can check later if the noise goes away when the PCM is disconnected.

So, I tested the car with and without the PCM tonight, and with the PCM all the issues are the same as they've been. Once I disconnected the PCM, there was a sound coming from the engine bay that sounded like fans turning on, but the CCRM made no noise at all.

Correct. The CCRM only makes noise when the PCM is connected, and I turn the key to the ON position.

I am confused why the CCRM would be buzzing/vibrating if an injector or fuel pump is grounded. Is that possible?

Any thoughts?

Okay. I turned the key, the CCRM began buzzing, and I was about to disconnect a fuel injector, and then I heard a click and the buzzing stopped. I then tried to turn on the car and it fired right up. This is a recurring theme where the problem is intermittent, and then I can't troubleshoot because the problem isn't manifesting itself. Just informing you in case this helps isolate the problem, but I will try to get the problem to reoccur so I can troubleshoot.

Alright, I got the CCRM buzzing again. I unplugged the fuel pump fuse, and the buzzing remained. Is that sufficient for 'disconnecting the fuel pump' or do I need to do something else? Also, it seems like the fuel injectors are inaccessible without taking apart some of the engine. Does that sound correct? I also disconnected some sensors, but I don't know all the sensors I may need to check.