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.