Mystery On/Off Switch Above Mirror Adjust Controls
2013 Ford Tioga 26Q E-450 chassis. Doesn't seem to do anything(?)
Forum Discussion
Almost certainly mirror heaters.
There's a reasonably good chance that they might operate even with the ignition off, so it would be a good idea to make doubly sure you turn them off after use lest you run down the chassis battery in pretty short order.
There's a reasonably good chance that they might operate even with the ignition off, so it would be a good idea to make doubly sure you turn them off after use lest you run down the chassis battery in pretty short order.
