No but why would they be unplugged?
So I don't know what transpired with Jeremy but the symptoms you were giving us here indicated a problem with the VATS.
Questions that have not been answered yet:
- Which PCM are you using? Your original one or the one from the donor truck?
- Has the ignition switch been checked or replaced?
- Has anything else been changed or modified?
The symptom of the security light being on solid and the security relearn not working is telling me that there is something else going on. Quite possibly the sensor in the key switch is not working and telling the BCM and PCM that the key switch has been damaged. That's why I suggested that VATS be disabled in the PCM so it would ignore that. Maybe
@limequat can chime in here if I'm wrong.
Now you're saying the power won't turn off. That may indicate a problem with the ignition switch.