type of d c electric motor 14 for controlling the window on the driver side door a dual four position switch 15 for controlling the window on the driver side door and a two position switch 16 for controlling the window on the front passenger side door the said switches 15 and 16 may be located normally on the armrest on the driver side door the said dual switch 15 presents a first contact element 17 which may be operated for connecting its common terminal to two terminals b and a for respectively raising the window partially and fully in automatic manner when the said contact element 17 shown schematically with the end bent is operated for contacting terminal a it also remains connected to terminal b the said dual switch 15 also presents a second contact element 18 identical to contact element 17 and designed to connect its center terminal to terminals c and d for respectively lowering the window partially and fully in automatic manner the fixed center terminals on dual switch 15 are connected to input 1 on control system 13 whereas a ground wire 3 from block 12 is connected via a resistive divider 19 to terminals a b c and d in more detail the said wire 3 is connected via resistor 20 to terminal a terminal.