Quote Originally Posted by BestRadarDetectors View Post
It does depending on the failure, Normally it will tell you which port has the error when the self check determines the problem. The issue here is the head is not ignoring the self check commands so it knows the head is attached and connected but its hanging up and causing the self check to stall causing it to stay in parking mode. The ALP unlike other systems will not start up and let you run it if there is an issue so if the self-check hangs or can not determine the error it will not put you into defense mode and give you a false sense of security. When the error is determined and we can get the bad head or cable back engineering will try to duplicate it and then add an additional routine to identity the failure if someone else in the future has the same problem.
Sounds good, I can't really take my install apart right now, as I am not home (and likely won't be until the Holidays)... but I'll spot shoot the wiring v. head the moment I can.

Thanks for you help, and TBH, as I said before I am really leaning towards a wire causing the issue.