Wiper Switch Test
- Check wiper switch continuity, using a continuity light (J-21008 or equivalent) or an ohmmeter. Continuity should exist at switch positions indicated in Figure.
- Using an ohmmeter, check variable resistance between No. 4 and 5 terminals of intermittent system if intermittent wipe cycle is not working, but system operates properly on low and high speeds. Turn switch knob counterclockwise as far as possible. Ohmmeter should indicate 5600-8400 ohms. As knob is turned clockwise, resistance should decrease to a minimum of 100-900 ohms.
- Replace switch if continuity or resistance tests fail. If operation is proper, check wiring.