Found and sort-of fixed another little problem with the car. Yesterday I wanted to take a quick trip to the store, but the windshield was foggy, so I hit the wipers. Nothing. So I wiped the windshield off with a paper towel and went to the store. Today I decided to investigate the problem. I found that the wipers did work with the switch on high, but only there. A check of the wiring diagram shows that on high, 12 volts goes directly to the wiper motor, but in all other positions, it goes through the pulse board. So I took the board out of my parts car in put it in the white car. Now the wipers work on all positions, but they don't completely turn off. In "off", the wipers still wipe at long intervals, like at the slowest pulse setting. So for now, I unplugged the pulse board.