Windows: Description and Operation

Glass, Frames and Mechanisms

COMPONENT LOCATION - SHEET 1 OF 2

NOTE:
Shaded areas denote armored glass.





COMPONENT LOCATION - SHEET 2 OF 2









OVERVIEW
Armored glass replaces the glass used in non-armored vehicles for the windshield and the door windows. Armored glass is also installed in an aperture in the steel armor behind the rear seats. The armored glass offers ballistic protection whilst retaining the optical quality of the glass in non-armored vehicles. The glass used in non-armored vehicles is retained for the roof, above the armor, for the sixth lights, and for the rear window. The rear window and the sixth lights are internally treated using an anti-smash film. There is no sunroof option on armored vehicles.
The windshield and the armored rear window incorporate heater elements as standard. Windshield heating is the same as on non-armored vehicles. Armored rear window heating is controlled by a relay under the luggage compartment floor cover, in the rear right corner of the spare wheel well, that switches power from the satellite junction box to the heater element.
The rear doors have fixed windows. The driver and front passenger doors either have a fixed window or an hydraulically operated window with a maximum opening of approximately 100 mm (4 in.). All of the window switches from non-armored vehicles are retained in armored vehicles, but only those related to an hydraulically operated front window are operative.
Hydraulically operated windows use the same door modules that are installed on non-armored vehicles, but the electric motor and cable regulator in the door are replaced by an hydraulic reservoir, reversible electric motor and hydraulic pump, and a scissor action regulator driven by an hydraulic ram. The opposing sides of the piston in the hydraulic ram are connected to the hydraulic pump so that the extension and retraction of the ram is related to the direction of rotation of the pump. The direction of rotation of the pump is controlled by window open and window close relays installed in the rear right corner of the spare wheel well, which switch power from the satellite junction box to the hydraulic pump motor.

SYSTEM OPERATION

Window Heating
Operation of windshield heating and rear window heating is the same as on non-armored vehicles, but when rear window heating is selected, the power output from the CJB (central junction box) to the rear window heater is also used to energize the armored rear window heater relay. The energized relay then connects power from the satellite junction box to the armored rear window heater.

Hydraulically Operated Window
While the window open and window close relays are de-energized, they connect opposing poles of the hydraulic pump motor to ground. When energized, the relays replace the ground connection with a power feed from the satellite junction box. By energizing one or other of the relays, the door module controls the direction of rotation of the hydraulic pump. When a window open or close selection is made with a window switch, the door module energizes the appropriate relay to move the window in the required direction. Window movement stops immediately the switch is released.

WARNING: There is no one-shot or anti-trap operation on hydraulically operated windows.