Thanks for the input. The problem changed symptoms on me and I made a couple of discoveries. When I turned the cabin light switch to the OFF (center) position the cabin alarm is silenced. Then I made another discovery: While turning right (the most common situation for initiating the failure) I move...

Blows intermittently. Sometimes weeks, days, daily. Last night 3 times within miles.
Chime sounds continuously when blown.
Trunk open light HAD been lighting when occurs but last night no trunk light. Comes on when trunk open.
Most lights out when occurs.

How do I troubleshoot this mess?