Windshield Wiping/Washing: Notes

The windshield wiping/washing functions are controlled by the GM III when the ignition is in position KL R or KL15. The system has four wiping stages and four interval wiping speeds. The wiper motor output control is through two relays (double relay >98 MY, except E38) that are located in the Electronics box (E box).

The Windshield Wiping System can also be supplemented with the optional Automatic Interval Control (AIC) system. AIC uses input from a Rain Sensor (or RLS) to control the wiper intervals in the intermittent mode. The Rain Sensor detects rain drops on the windshield and sends signals to the GM via the K-Bus.