Checked the fuses and they're all okay. The previous owner told me they went just before I bought the car from him. It seems strange to me that all of the motors would have gone at the same time, and that it it's not the motors but some part that they all have in common. Some have alluded to an "ice cube relay", but I haven't gotten a good explanation of what and where it is. Some have said it's behind the instrument cluster, but I'd hate to take it apart to find that I was looking in the wrong place.