Hey everyone, 
  
After a very cold morning -8, i went to start the Z to go to work. It refused to start it just made a click sound from the engine, then all the power goes. All the light on dash will turn on but when i go to start it, it cuts out. Anyway i thought it would be the battery so i got a new one and swapped it. But i get the exact same problem as before.  
  
it seems like the power is cutting out when i try to start it. its like its shorting out or something. 
  
Does anyone know what this could be? 
  
Thanks  
  
Steve