Alarm sounding after running blower

[Seattle Steve]

My 2007 290 sundancer has had an alarm go off a few times for no apparent reason. I suspect a short in the wiring somewhere.

Today, after sitting overnight, I ran the blower for about 60 seconds when the alarm abruptly went off, a steady constant loud alarm. I could only kill it by pulling the connection to the alarm itself. The boat ran fine after that - no issues at all with overheating, water pressure, oil pressure, etc.

Any ideas what I should evaluate / diagnose?

Thanks for your help as always!

 

[blu-ray]

need to be more specific?!?! alarm went off while running blower prior to starting engines? maybe a low voltage alarm? or was Alarm part of engine diagnostics?, .. did you get a warning message on digi displays in mercury view gauges? what exactly did you unplug?!?!

 

[Seattle Steve]

This was prior to running engines, never even started engines so did not get any diagnostic warning of any sort. Disconnected the wire running to the alarm (below the dashboard instrument panel)..... All is running fine, no problem other than the alarm itself....

 

[Seattle Steve]

I have reconnected everything and the alarm is no longer sounding. I wonder if it is either a short somewhere or a low voltage alarm.