Jetta GiX cars sometimes encounter electric windows do not work, the central control lock does not work the fault phenomenon. Encounter such failures, many maintenance personnel in the inspection of the fuse found no problem, it felt no way to start. Because the power window and the central control lock are used to control the ground line, the wiring harness can not measure the voltage, the fault is occurring in the line or in the accessories is difficult to determine. If it is difficult to follow the routine procedures to check out the clue, and change the parts to confirm the cause of the failure and need to spend a lot of time and a lot of work. I am in the process of long-term maintenance to find a shortcut, that is, with the ears and eyes to see the way, combined with the structure of the relevant principles of the system quickly find the root cause.
    To check the power window does not work as an example, the ignition key is placed in the ON position, press the left front door power window switch, if you can hear the power window / central locking controller, but the power window does not work, then First check T1, T2 and other wiring harness is not real. If the harness is in good contact, it is proven that the motorized window motor is damaged.
    Press the left front door power window switch, if you can not hear the power window / central locking controller of the suction sound, you can remove the driver side door electric window control lock switch, with LED light-emitting diode to do a test light, open the ignition switch Then, one end is grounded and the other end is connected to the power window switch harness. If you are not familiar with the line, you can from T1 'to T13' one by one by line test, and pay attention to observe the light-emitting diode flashing situation. If you can hear the power window / central locking controller of the suction sound, but also to see the light-emitting diode shiny, indicating that the left front door power window centralized control switch damage. If you can not hear the electric window / central locking controller of the suction sound, indicating that the controller is damaged (the central locking and the above method is basically the same).