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Electrical system 29
9-5
83
61
E363D 026
649
650
Rain Sensing Wipers (Available on Arc and Aero)
Brief description
• Stalk switch (61)
• Rain sensor (649)
• Relay (83 and 650)
Windshield wipers with rain sensor
The windshield wiper unit is located under the
cover below the windshield and comprises a
motor, arm system and two wiper arms with
wiper blades. The function is controlled by the
rain sensor via two wiper relays.
The windshield wipers have two speeds,
high/low, and an automatic mode. In automatic
mode, the rain sensor sensitivity can be
adjusted using a control on the stalk switch.
The rain sensor measures the amount of
moisture on the windshield using sensors that
generate infrared light. The sensor automatically
starts the wiper blade on the windshield and
adjusts the speed to the current weather
conditions. The system calculates the need to
activate the windshield wipers in all weather
conditions.
The rain sensor assumes the DICE functions
regarding windshield wipers.
The system is activated by moving the stalk
switch on the steering wheel (located to the right
of the steering wheel) to position 1. On cars
without rain sensor, this position is for
intermittent wiper operation. How sensitive the
sensor is and how often the wipers operate can
be adjusted with the knob on the stalk switch.
The sensor is most sensitive with the knob in its
uppermost position.
The system switches between single and
continuous strokes depending on the amount of
snow or water that is on the windscreen. The
sensitivity will increase in darkness.
In the U.S., the system will be available as part
of an optional package on Saab 9-5 Arc 3.0t and
Aero models.