I checked the fuse (#26, 30amps) and it's fine. But I think I found the problem.
I removed the switch and it looks like the connector in the recess is fairly loose. When I push the switch back in, it seems unlikely that the pins will line up. I think the rear of the switch is just pushing the connector back.
Are they supposed to be loose or fixed in place? If loose, how do I make sure the switch connects correctly without ripping the dash apart?