Can anyone plz help me locating Infiniti G35x 2005 Sedan Window Relay location?

 

There isn't one. The window up/down buttons are a serial link to the BCM which processes and sends the data via CAN to the switch CPU located inside the same enclosure as the button for that window. The CPU process CAN and actuates the motor directly, no serviceable relays.

What exactly is the window doing? If it's not working then unplug the harness from the motor, stick DMM probes into the two harness pins, and check for voltage. You should have have battery voltage present when the button is pressed, it switches polarity for up/down operation. If you do NOT have voltage present when the switch is being operated then you need to troubleshoot the switch or sub-switch (driver side is the primary switch, passenger side is sub-switch).