I am new to this forum. I just bought a used Astra 1.4 2003 (sorry i dont know which MK*). I have a problem with the remote control. The key's battery is ok, the light blinks when [ressing the lock/unlock buttons. It only lock/unlock manually by inserting the key. Where is the remote control module in this car? any ideas to fix it? any place to download wiring diagram?