Corvette CCM Reverse Engineering Anyone?

[steveo]

With only power to F1 and ground on E16, < edit, had letters swapped] try grounding the drivers side door input - C12. Regardless of security system state your buzzer should cycle on and off about 1.5 times per second.

And yes, almost all digital input pins will wake the unit and cause it to start spamming the aldl.

i ran the test and got the expected result, so that means my security light works, right? it's not triggering the security light during normal operation.

i tried cutting IGN (but not BAT) for a few hours and then came back and connected it again, same result.

not sure what else it could be. there is definitely no heartbeat frame and the CCM definitely does not want to shut up

i would buy that there's some preconditions for the CCM to think it's in a vehicle and everything is okay, but that doesn't explain why it was working on the bench for you ?

also just tried a simulated key insertion - connect BAT without resistor or IGN, then add resistor, then IGN.