wiper motor ballast resistor

Do they not work at all? The resistor is only for the low speed. If hi works but not low then its the resistor. If neither speed works it could be the motor or the switch, or binding of the linkage under the dash. Find a shop manual. It gives the procedure to test the motor. From my experiencee the 2 speed motor is a little more durable than the 3 speed or variable speed units. I think it has to do with the gear box more than the motor. But they do go bad. I got a replacement from rockauto. Think it was around $75 or so.

Larry