Originally Posted by Caretti
Volsfan is my wife.
The battery boost switch is to the right of the mystery switch. It looks similar to Iggy's. Checking voltage with the engine running and the switch toggled both ways read 13.6V so alternator is connected to storage batteries either way.
Hopefully we will never need to figure it out.
Not sure I am following your statement of never figuring it out. As several members have already stated, the toggle switch is to the heated mirrors.
It has been figured out. The mystery is solved.