Intermittent Windshield Wipers

When the wiper switch is set to one of the 5 intermittent settings, it supplies ground to the internal windshield wiper motor module intermittent speed inputs, and the windshield wipers will continuously cycle for a single sweep followed by a delay of approximately 1 to 21 seconds, depending on which intermittent setting has been selected. When one of the intermittent settings is selected, the internal windshield wiper motor module starts an intermittent cycle by grounding the run/park relay coil, which activates the relay, and provides 12 volts to the low speed input of the wiper motor, causing the windshield wiper motor to cycle. When the windshield wiper motor reaches the end of an intermittent cycle, the position of the windshield wiper motor armature will cause the Hall-effect sensor to generate a voltage signal. When the wiper motor module detects the voltage signal generated by the Hall-effect sensor, it will simultaneously start a delay timer and deactivate the run/park relay, which disconnects voltage to the windshield wiper motor, leaving it parked. The windshield wipers remain parked until the internal windshield wiper motor module delay timer completes, and the next intermittent windshield wiper cycle starts.