The first thing to try is to get under the dash and find the delay module. It should be a black box with a largish plug at each end, stuck to the underside of the dash with Velcro. Remove that module, and plug the two ends of the harness together. If your wipers now work, it's the module. If they still don't, you'll have to do some more troubleshooting. You could start by taking the cowl vent cover off, and unplugging the motor, and seeing if there is any voltage to the motor terminals. One terminal will be hot all the time the ignition is on (that's the park line). One should go hot when you're on high, and another on low. You can figure this out with a test light and trial and error. If you're getting voltage to the terminals, it's the motor. If there isn't, you need to trace backwards.