The alarm disarm is set to “Always with key”. We done this as discussed on a previous thread when I first encountered this issue. I will read the WSM alarm section to try and get a better understanding of the system, but I will say that even though I can fix just about anything made of metal, I’m electronics dyslexic !!
As usual on these matters SF, I can’t tell you how much we have come to rely on you to assist on electrical gremlins on these vehicles. I propose you start your own youtube site along the lines of Britannica Restorations, but for electronic issues. You would make a fortune