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GF83.10-D-4200H Roof Ventilator Switch Component Description




GF83.10-D-4200H Roof Ventilator Switch Component Description

- with CODE (H72) Electric roof fan







S163 Roof fan switch

Location
The roof ventilator switch is located in the instrument panel at the left next to the steering wheel.

Task
The driver can use the roof ventilator switch to ventilate the vehicle's load compartment with the roof ventilator. Pressing the upper part of the roof ventilator switch ventilates the load compartment. Pressing the lower section of the roof ventilator switch admits air to the load compartment. The roof ventilator can only be switched off, if the roof ventilator switch has been moved back to its center position.

Design
The roof ventilator switch consists of a housing, 2 switching surfaces (sections), an integrated light emitting diode (LED), 2 switching contacts and a plug connection.

Function
The roof ventilator switch is provided with power as from a "circuit 15 ON" status over the fuse 9 (15 A), multitone horn/roof fan (F55/3f9). If the roof ventilator switch is pressed in the upper section (ventilate load compartment), the voltage is applied to the roof fan motor (M78).
The current flows over the 1st switching contact in the roof ventilator switch to the roof fan motor and then over the 2nd switching contact in the roof ventilator switch to ground (circuit 31). The roof fan motor turns towards the "Ventilate load compartment" direction of rotation.
If the roof ventilator switch is pressed in the lower section (admit air to load compartment), the voltage is also applied to the roof fan motor. The current flows over the 2nd switching contact in the roof ventilator switch to the roof fan motor and then over the 1st switching contact in the roof ventilator switch to ground (circuit 31). The roof fan motor turns towards the "Admit air to load compartment" direction of rotation.
If the roof ventilator switch is moved to the center position, the voltage applied to the roof fan motor is interrupted. Current then no longer flows, because the 1st switching contact in the roof ventilator switch and the 2nd switching contact in the roof ventilator switch are connected to ground (circuit 31). The roof fan motor stops rotating. If a voltage is applied to the roof ventilator switch from circuit 58d, the LED integrated into the roof ventilator switch lights up and thus makes it easier to locate the roof ventilator switch in the dark (switch and controls illumination).