[avale]

The 986forum.com (also run by Pelican Parts) is more active for Boxster related questions. You should re-post over there. I went through debugging an '98 but it turned out to be bad door latches and a faulty ignitions switch assembly. It was the ignition switch assembly that was giving me a double beep (fault in the system) and causing the alarm to go off randomly. May want to replace that to simply cross it off the list. I believe a single horn beep means the car thinks something is still open/unlatched.