I had a Maverick 'not from Alaska' that would turn on the dome light when it got below about 35 degrees. Never saw it cause the car had to cool to that point.........Weird. Neighbor told me.

In place of a ampmeter, you can also use a small light bulb like on a lawn tractor to see if it lights a bit. If not use a brake bulb to see if there is a drain with everything off. Smaller bulbs will show the clock, computer and radio memory so dont use them or youll get false readings. It is a cheap work around for the tool poor among us. Woody